This file contains information about GCC releases which has been generated
automatically from the online release notes. It covers releases of GCC
(and the former EGCS project) since EGCS 1.0, on the line of development
that led to GCC 3. For information on GCC 2.8.1 and older releases of GCC 2,
see ONEWS.
======================================================================
http://gcc.gnu.org/gcc-4.0/index.html
GCC 4.0 Release Series
April 20, 2005
The [1]GNU project and the GCC developers are pleased to announce the
release of GCC 4.0.0.
Release History
GCC 4.0.0
April 20, 2005 ([2]changes)
References and Acknowledgements
GCC used to stand for the GNU C Compiler, but since the compiler
supports several other languages aside from C, it now stands for the
GNU Compiler Collection.
A list of [3]successful builds is updated as new information becomes
available.
The GCC developers would like to thank the numerous people that have
contributed new features, improvements, bug fixes, and other changes
as well as test results to GCC. This [4]amazing group of volunteers is
what makes GCC successful.
For additional information about GCC please refer to the [5]GCC
project web site or contact the [6]GCC development mailing list.
To obtain GCC please use [7]our mirror sites, one of the [8]GNU mirror
sites, or [9]our CVS server.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [10]gnu@gnu.org. There
are also [11]other ways to contact the FSF.
These pages are maintained by [12]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [13]GCC manuals. If that fails, the
[14]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [15]gcc@gnu.org or
[16]gcc@gcc.gnu.org. All of our lists have [17]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2005-04-21 [18]Valid XHTML 1.0
References
1. http://www.gnu.org/
2. http://gcc.gnu.org/gcc-4.0/changes.html
3. http://gcc.gnu.org/gcc-4.0/buildstat.html
4. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
5. http://gcc.gnu.org/index.html
6. mailto:gcc@gcc.gnu.org
7. http://gcc.gnu.org/mirrors.html
8. http://www.gnu.org/order/ftp.html
9. http://gcc.gnu.org/cvs.html
10. mailto:gnu@gnu.org
11. http://www.gnu.org/home.html#ContactInfo
12. http://gcc.gnu.org/about.html
13. http://gcc.gnu.org/onlinedocs/
14. mailto:gcc-help@gcc.gnu.org
15. mailto:gcc@gnu.org
16. mailto:gcc@gcc.gnu.org
17. http://gcc.gnu.org/lists.html
18. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.0/changes.html
GCC 4.0 Release Series
Changes, New Features, and Fixes
Caveats
* GCC now generates location lists by default when compiling with
debug info and optimization.
+ GDB 6.0 and older crashes when it sees location lists. GDB
6.1 or later is needed to debug binaries containing location
lists.
+ When you are trying to view a value of a variable in a part
of a function where it has no location (for example when the
variable is no longer used and thus its location was used for
something else) GDB will say that it is not available.
You can disable generating location lists by -fno-var-tracking.
* GCC no longer accepts the -fwritable-strings option. Use named
character arrays when you need a writable string.
* The options -freduce-all-givs and -fmove-all-movables have been
discontinued. They were used to circumvent a shortcoming in the
heuristics of the old loop optimization code with respect to
common Fortran constructs. The new (tree) loop optimizer works
differently and doesn't need those work-arounds.
* The graph-coloring register allocator, formerly enabled by the
option -fnew-ra, has been discontinued.
* -I- has been deprecated. -iquote is meant to replace the need for
this option.
* The MIPS -membedded-pic and -mrnames options have been removed.
* All MIPS targets now require the GNU assembler. In particular,
IRIX configurations can no longer use the MIPSpro assemblers,
although they do still support the MIPSpro linkers.
* The SPARC option -mflat has been removed.
* English-language diagnostic messages will now use Unicode
quotation marks in UTF-8 locales. (Non-English messages already
used the quotes appropriate for the language in previous
releases.) If your terminal does not support UTF-8 but you are
using a UTF-8 locale (such locales are the default on many
GNU/Linux systems) then you should set LC_CTYPE=C in the
environment to disable that locale. Programs that parse
diagnostics and expect plain ASCII English-language messages
should set LC_ALL=C. See [1]Markus Kuhn's explanation of Unicode
quotation marks for more information.
* The specs file is no longer installed on most platforms. Most
users will be totally unaffected. However, if you are accustomed
to editing the specs file yourself, you will now have to use the
-dumpspecs option to generate the specs file, and then edit the
resulting file.
General Optimizer Improvements
* The [2]tree ssa branch has been merged. This merge has brought in
a completely new optimization framework based on a higher level
intermediate representation than the existing RTL representation.
Numerous new code transformations based on the new framework are
available in GCC 4.0, including:
+ Scalar replacement of aggregates
+ Constant propagation
+ Value range propagation
+ Partial redundancy elimination
+ Load and store motion
+ Strength reduction
+ Dead store elimination
+ Dead and unreachable code elimination
+ [3]Autovectorization
+ Loop interchange
+ Tail recursion by accumulation
Many of these passes outperform their counterparts from previous
GCC releases.
* [4]Swing Modulo Scheduling (SMS). An RTL level instruction
scheduling optimization intended for loops that perform heavy
computations.
New Languages and Language specific improvements
C family
* The sentinel attribute has been added to GCC. This function
attribute allows GCC to warn when variadic functions such as execl
are not NULL terminated. See the GCC manual for a complete
description of its behavior.
* Given __attribute__((alias("target"))) it is now an error if
target is not a symbol, defined in the same translation unit. This
also applies to aliases created by #pragma weak alias=target. This
is because it's meaningless to define an alias to an undefined
symbol. On Solaris, the native assembler would have caught this
error, but GNU as does not.
C and Objective-C
* The -Wstrict-aliasing=2 option has been added. This warning
catches all unsafe cases, but it may also give a warning for some
cases that are safe.
* The cast-as-lvalue, conditional-expression-as-lvalue and
compound-expression-as-lvalue extensions, which were deprecated in
3.3.4 and 3.4, have been removed.
* The -fwritable-strings option, which was deprecated in 3.4, has
been removed.
* #pragma pack() semantics have been brought closer to those used by
other compilers. This also applies to C++.
* Taking the address of a variable with register storage is invalid
in C. GCC now issues an error instead of a warning.
* Arrays of incomplete element type are invalid in C. GCC now issues
an error for such arrays. Declarations such as extern struct s
x[]; (where struct s has not been defined) can be moved after the
definition of struct s. Function parameters declared as arrays of
incomplete type can instead be declared as pointers.
C++
* When compiling without optimizations (-O0), the C++ frontend is
much faster than in any previous versions of GCC. Independent
testers have measured speed-ups up to 25% in real-world production
code, compared to the 3.4 family (which was already the fastest
version to date). Upgrading from older versions might show even
bigger improvements.
* ELF visibility attributes can now be applied to a class type, so
that it affects every member function of a class at once, without
having to specify each individually:
class __attribute__ ((visibility("hidden"))) Foo
{
int foo1();
void foo2();
};
The syntax is deliberately similar to the __declspec() system used
by Microsoft Windows based compilers, allowing cross-platform
projects to easily reuse their existing macro system for denoting
exports and imports. By explicitly marking internal classes never
used outside a binary as hidden, one can completely avoid PLT
indirection overheads during their usage by the compiler. You can
find out more about the advantages of this at
[5]http://people.redhat.com/drepper/dsohowto.pdf
* The -fvisibility-inlines-hidden option has been added which marks
all inlineable functions as having hidden ELF visibility, thus
removing their symbol and typeinfo from the exported symbol table
of the output ELF binary. Using this option can reduce the
exported symbol count of template-heavy code by up to 40% with no
code change at all, thus notably improving link and load times for
the binary as well as a reduction in size of up to 10%. Also,
check the new [6]-fvisibility option.
* The compiler now uses the library interface specified by the
[7]C++ ABI for thread-safe initialization of function-scope static
variables. Most users should leave this alone, but embedded
programmers may want to disable this by specifying
-fno-threadsafe-statics for a small savings in code size.
* Taking the address of an explicit register variable is no longer
supported. Note that C++ allows taking the address of variables
with register storage so this will continue to compile with a
warning. For example, assuming that r0 is a machine register:
register int foo asm ("r0");
register int bar;
&foo; // error, no longer accepted
&bar; // OK, with a warning
* G++ has an undocumented extension to virtual function covariancy
rules that allowed the overrider to return a type that was
implicitly convertable to the overridden function's return type.
For instance a function returning void * could be overridden by a
function returning T *. This is now deprecated and will be removed
in a future release.
* The G++ minimum and maximum operators (<? and >?) and their
compound forms (<?=) and >?=) have been deprecated and will be
removed in a future version. Code using these operators should be
modified to use std::min and std::max instead.
* Declaration of nested classes of class templates as friends are
supported:
template <typename T> struct A {
class B {};
};
class C {
template <typename T> friend class A<T>::B;
};
This complements the feature member functions of class templates
as friends introduced in GCC 3.4.0.
* When declaring a friend class using an unqualified name, classes
outside the innermost non-class scope are not searched:
class A;
namespace N {
class B {
friend class A; // Refer to N::A which has not been declared yet
// because name outside namespace N are not searched
friend class ::A; // Refer to ::A
};
}
Hiding the friend name until declaration is still not implemented.
* Friends of classes defined outside their namespace are correctly
handled:
namespace N {
class A;
}
class N::A {
friend class B; // Refer to N::B in GCC 4.0.0
// but ::B in earlier versions of GCC
};
Runtime Library (libstdc++)
* Optimization work:
+ Added efficient specializations of istream functions for char
and wchar_t.
+ Further performance tuning of strings, in particular wrt
single-char append and getline.
+ iter_swap - and therefore most of the mutating algorithms -
now makes an unqualified call to swap when the value_type of
the two iterators is the same.
* A large subset of the features in Technical Report 1 (TR1 for
short) is experimentally delivered (i.e., no guarantees about the
implementation are provided. In particular it is not promised that
the library will remain link compatible when code using TR1 is
used):
+ General utilities such as reference_wrapper and shared_ptr.
+ Function objects, i.e., result_of, mem_fn, bind, function.
+ Support for metaprogramming.
+ New containers such as tuple, array, unordered_set,
unordered_map, unordered_multiset, unordered_multimap.
* As usual, many bugs have been fixed and LWG resolutions
implemented for the first time (e.g., DR 409).
Java
* In order to prevent naming conflicts with other implementations of
these tools, some GCJ binaries have been renamed:
+ rmic is now grmic,
+ rmiregistry is now grmiregistry, and
+ jar is now fastjar.
In particular, these names were problematic for the jpackage.org
packaging conventions which install symlinks in /usr/bin that
point to the preferred versions of these tools.
* The -findirect-dispatch argument to the compiler now works and
generates code following a new "binary compatibility" ABI. Code
compiled this way follows the binary compatibility rules of the
Java Language Specification.
* libgcj now has support for using GCJ as a JIT, using the
gnu.gcj.jit family of system properties.
* libgcj can now find a shared library corresponding to the bytecode
representation of a class. See the documentation for the new
gcj-dbtool program, and the new gnu.gcj.precompiled.db.path system
property.
* There have been many improvements to the class library. Here are
some highlights:
+ Much more of AWT and Swing exist.
+ Many new packages and classes were added, including
java.util.regex, java.net.URI, javax.crypto,
javax.crypto.interfaces, javax.crypto.spec, javax.net,
javax.net.ssl, javax.security.auth,
javax.security.auth.callback, javax.security.auth.login,
javax.security.auth.x500, javax.security.sasl, org.ietf.jgss,
javax.imageio, javax.imageio.event, javax.imageio.spi,
javax.print, javax.print.attribute,
javax.print.attribute.standard, javax.print.event, and
javax.xml
+ Updated SAX and DOM, and imported GNU JAXP
Fortran
* A new [8]Fortran front end has replaced the aging GNU Fortran 77
front end. The new front end supports Fortran 90 and Fortran 95.
It may not yet be as stable as the old Fortran front end.
Ada
* Ada (with tasking and Zero Cost Exceptions) is now available on
many more targets, including but not limited to: alpha-linux,
hppa-hpux, hppa-linux, powerpc-darwin, powerpc-linux, s390-linux,
s390x-linux, sparc-linux.
* Some of the new Ada 2005 features are now implemented like
Wide_Wide_Character and Ada.Containers.
* Many bugs have been fixed, tools and documentation improved.
* To compile Ada from the sources, install an older working Ada
compiler and then use --enable-languages=ada at configuration
time, since the Ada frontend is not currently activated by
default. See the [9]Installing GCC for details.
New Targets and Target Specific Improvements
H8/300
* The frame layout has changed. In the new layout, the prologue of a
function first saves registers and then allocate space for locals,
resulting in an 1% improvement on code size.
IA-32/x86-64 (AMD64)
* The acos, asin, drem, exp10, exp2, expm1, fmod, ilogb, log10,
log1p, log2, logb and tan mathematical builtins (and their float
and long double variants) are now implemented as inline x87
intrinsics when using -ffast-math.
* The ceil, floor, nearbyint, rint and trunc mathematical builtins
(and their float and long double variants) are now implemented as
inline x87 intrinsics when using -ffast-math.
* The x87's fsincos instruction is now used automatically with
-ffast-math when calculating both the sin and cos of the same
argument.
* Instruction selection for multiplication and division by constants
has been improved.
IA-64
* Floating point division, integer division and sqrt are now
inlined, resulting in significant performance improvements on some
codes.
MIPS
* Division by zero checks now use conditional traps if the target
processor supports them. This decreases code size by one word per
division operation. The old behavior (branch and break) can be
obtained either at configure time by passing --with-divide=breaks
to configure or at runtime by passing -mdivide-breaks to GCC.
* Support for MIPS64 paired-single instructions has been added. It
is enabled by -mpaired-single and can be accessed using both the
target-independent vector extensions and new MIPS-specific
built-in functions.
* Support for the MIPS-3D ASE has been added. It is enabled by
-mips3d and provides new MIPS-3D-specific built-in functions.
* The -mexplicit-relocs option now supports static n64 code (as is
used, for example, in 64-bit linux kernels). -mexplicit-relocs
should now be feature-complete and is enabled by default when GCC
is configured to use a compatible assembler.
* Support for the NEC VR4130 series has been added. This support
includes the use of VR-specific instructions and a new VR4130
scheduler. Full VR4130 support can be selected with -march=vr4130
while code for any ISA can be tuned for the VR4130 using
-mtune=vr4130. There is also a new -mvr4130-align option that
produces better schedules at the cost of increased code size.
* Support for the Broadcom SB-1 has been extended. There is now an
SB-1 scheduler as well as support for the SB-1-specific
paired-single instructions. Full SB-1 support can be selected with
-march=sb1 while code for any ISA can be optimized for the SB-1
using -mtune=sb1.
* The compiler can now work around errata in R4000, R4400, VR4120
and VR4130 processors. These workarounds are enabled by
-mfix-r4000, -mfix-r4400, -mfix-vr4120 and -mfix-vr4130
respectively. The VR4120 and VR4130 workarounds need binutils 2.16
or above.
* IRIX shared libraries are now installed into the standard library
directories: o32 libraries go into lib/, n32 libraries go into
lib32/ and n64 libraries go into lib64/.
* The compiler supports a new -msym32 option. It can be used to
optimize n64 code in which all symbols are known to have 32-bit
values.
S/390 and zSeries
* New command line options help to generate code intended to run in
an environment where stack space is restricted, e.g. Linux kernel
code:
+ -mwarn-framesize and -mwarn-dynamicstack trigger compile-time
warnings for single functions that require large or dynamic
stack frames.
+ -mstack-size and -mstack-guard generate code that checks for
stack overflow at run time.
+ -mpacked-stack generates code that reduces the stack frame
size of many functions by reusing unneeded parts of the stack
bias area.
* The -msoft-float option now ensures that generated code never
accesses floating point registers.
* The s390x-ibm-tpf target now fully supports C++, including
exceptions and threads.
* Various changes to improve performance of the generated code have
been implemented, including:
+ GCC now uses sibling calls where possible.
+ Condition code handling has been optimized, allowing GCC to
omit redundant comparisons in certain cases.
+ The cost function guiding many optimizations has been refined
to more accurately represent the z900 and z990 processors.
+ The ADD LOGICAL WITH CARRY and SUBTRACT LOGICAL WITH BORROW
instructions are now used to avoid conditional branches in
certain cases.
+ The back end now uses the LEGITIMIZE_RELOAD_ADDRESS feature
to optimize address arithmetic required to access large stack
frames.
+ GCC now makes more efficient use of memory-to-memory type
instructions (MVC, CLC, ...).
+ More precise tracking of special register use allows better
instruction scheduling, in particular of the function
prologue and epilogue sequences.
+ The Java front end now generates inline code to implement
integer division, instead of calling library routines.
SPARC
* The options -mv8, -msparclite, -mcypress, -msupersparc, -mf930 and
-mf934 have been removed. They have been replaced with -mcpu=xxx.
* The internal model used to estimate the relative cost of each
instruction has been updated. It is expected to give better
results on recent UltraSPARC processors.
* Code generation for function prologues and epilogues has been
improved, resulting in better scheduling and allowing multiple
exit points in functions.
* Support for Sun's Visual Instruction Set (VIS) has been enhanced.
It is enabled by -mvis and provides new built-in functions for VIS
instructions on UltraSPARC processors.
NetWare
* Novell NetWare (on ix86, no other hardware platform was ever
really supported by this OS) has been re-enabled and the ABI
supported by GCC has been brought into sync with that of
MetroWerks CodeWarrior (the ABI previously supported was that of
some Unix systems, which NetWare never tried to support).
Obsolete Systems
Support for a number of older systems has been declared obsolete in
GCC 4.0. Unless there is activity to revive them, the next release of
GCC will have their sources permanently removed.
These individual systems have been obsoleted:
* SPARC family
+ SPARClite-based systems (sparclite-*-coff, sparclite-*-elf,
sparc86x-*-elf)
+ OpenBSD 32-bit (sparc-*-openbsd*)
Documentation improvements
Other significant improvements
* Location lists are now generated by default when compiling with
debug info and optimization. Location lists provide more accurate
debug info about locations of variables and they allow debugging
code compiled with -fomit-frame-pointer.
* The -fvisibility option has been added which allows the default
ELF visibility of all symbols to be set per compilation and the
new #pragma GCC visibility preprocessor command allows the setting
of default ELF visibility for a region of code. Using
-fvisibility=hidden especially in combination with the new
-fvisibility-inlines-hidden can yield substantial improvements in
output binary quality including avoiding PLT indirection
overheads, reduction of the exported symbol count by up to 60%
(with resultant improvements to link and load times), better scope
for the optimizer to improve code and up to a 20% reduction in
binary size. Using these options correctly yields a binary with a
similar symbol count to a Windows DLL.
Perhaps more importantly, this new feature finally allows (with
careful planning) complete avoidance of symbol clashes when
manually loading shared objects with RTLD_GLOBAL, thus finally
solving problems many projects such as python were forced to use
RTLD_LOCAL for (with its resulting issues for C++ correctness).
You can find more information about using these options at
[10]http://gcc.gnu.org/wiki/Visibility.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There
are also [12]other ways to contact the FSF.
These pages are maintained by [13]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [14]GCC manuals. If that fails, the
[15]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [16]gcc@gnu.org or
[17]gcc@gcc.gnu.org. All of our lists have [18]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2005-04-16 [19]Valid XHTML 1.0
References
1. http://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html
2. http://gcc.gnu.org/projects/tree-ssa/
3. http://gcc.gnu.org/projects/tree-ssa/vectorization.html
4. http://gcc.gnu.org/news/sms.html
5. http://people.redhat.com/drepper/dsohowto.pdf
6. http://gcc.gnu.org/gcc-4.0/changes.html#visibility
7. http://www.codesourcery.com/cxx-abi/
8. http://gcc.gnu.org/fortran/
9. http://gcc.gnu.org/install/
10. http://gcc.gnu.org/wiki/Visibility
11. mailto:gnu@gnu.org
12. http://www.gnu.org/home.html#ContactInfo
13. http://gcc.gnu.org/about.html
14. http://gcc.gnu.org/onlinedocs/
15. mailto:gcc-help@gcc.gnu.org
16. mailto:gcc@gnu.org
17. mailto:gcc@gcc.gnu.org
18. http://gcc.gnu.org/lists.html
19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.4/index.html
GCC 3.4 Release Series
November 4, 2004
The [1]GNU project and the GCC developers are pleased to announce the
release of GCC 3.4.3.
This release is a bug-fix release, containing fixes for regressions in
GCC 3.4.2 relative to previous releases of GCC.
September 6, 2004
The [2]GNU project and the GCC developers are pleased to announce the
release of GCC 3.4.2.
This release is a bug-fix release, containing fixes for regressions in
GCC 3.4.1 relative to previous releases of GCC.
July 1, 2004
The [3]GNU project and the GCC developers are pleased to announce the
release of GCC 3.4.1.
This release is a bug-fix release, containing fixes for regressions in
GCC 3.4.0 relative to previous releases of GCC.
April 18, 2004
The [4]GNU project and the GCC developers are pleased to announce the
release of GCC 3.4.0.
The GCC 3.4 release series includes numerous [5]new features,
improvements, bug fixes, and other changes, thanks to an [6]amazing
group of volunteers.
Release History
GCC 3.4.3
November 4, 2004 ([7]changes)
GCC 3.4.2
September 6, 2004 ([8]changes)
GCC 3.4.1
July 1, 2004 ([9]changes)
GCC 3.4.0
April 18, 2004 ([10]changes)
References and Acknowledgements
GCC used to stand for the GNU C Compiler, but since the compiler
supports several other languages aside from C, it now stands for the
GNU Compiler Collection.
A list of [11]successful builds is updated as new information becomes
available.
The GCC developers would like to thank the numerous people that have
contributed new features, improvements, bug fixes, and other changes
as well as test results to GCC. This [12]amazing group of volunteers
is what makes GCC successful.
For additional information about GCC please refer to the [13]GCC
project web site or contact the [14]GCC development mailing list.
To obtain GCC please use [15]our mirror sites, one of the [16]GNU
mirror sites, or [17]our CVS server.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [18]gnu@gnu.org. There
are also [19]other ways to contact the FSF.
These pages are maintained by [20]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [21]GCC manuals. If that fails, the
[22]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [23]gcc@gnu.org or
[24]gcc@gcc.gnu.org. All of our lists have [25]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [26]Valid XHTML 1.0
References
1. http://www.gnu.org/
2. http://www.gnu.org/
3. http://www.gnu.org/
4. http://www.gnu.org/
5. http://gcc.gnu.org/gcc-3.4/changes.html
6. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
7. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.3
8. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.2
9. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.1
10. http://gcc.gnu.org/gcc-3.4/changes.html
11. http://gcc.gnu.org/gcc-3.4/buildstat.html
12. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
13. http://gcc.gnu.org/index.html
14. mailto:gcc@gcc.gnu.org
15. http://gcc.gnu.org/mirrors.html
16. http://www.gnu.org/order/ftp.html
17. http://gcc.gnu.org/cvs.html
18. mailto:gnu@gnu.org
19. http://www.gnu.org/home.html#ContactInfo
20. http://gcc.gnu.org/about.html
21. http://gcc.gnu.org/onlinedocs/
22. mailto:gcc-help@gcc.gnu.org
23. mailto:gcc@gnu.org
24. mailto:gcc@gcc.gnu.org
25. http://gcc.gnu.org/lists.html
26. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.4/changes.html
GCC 3.4 Release Series
Changes, New Features, and Fixes
The latest release in the 3.4 release series is [1]GCC 3.4.3.
GCC 3.4 has [2]many improvements in the C++ frontend. Before reporting
a bug, please make sure it's really GCC, and not your code, that is
broken.
Caveats
* GNU Make is now required to build GCC.
* With -nostdinc the preprocessor used to ignore both standard
include paths and include paths contained in environment
variables. It was neither documented nor intended that environment
variable paths be ignored, so this has been corrected.
* GCC no longer accepts the options -fvolatile, -fvolatile-global
and -fvolatile-static. It is unlikely that they worked correctly
in any 3.x release.
* GCC no longer ships <varargs.h>. Use <stdarg.h> instead.
* Support for all the systems [3]obsoleted in GCC 3.3 has been
removed from GCC 3.4. See below for a [4]list of systems which are
obsoleted in this release.
* GCC now requires an ISO C90 (ANSI C89) C compiler to build. K&R C
compilers will not work.
* The implementation of the [5]MIPS ABIs has changed. As a result,
the code generated for certain MIPS targets will not be binary
compatible with earlier releases.
* In previous releases, the MIPS port had a fake "hilo" register
with the user-visible name accum. This register has been removed.
* The implementation of the [6]SPARC ABIs has changed. As a result,
the code generated will not be binary compatible with earlier
releases in certain cases.
* The configure option --enable-threads=pthreads has been removed;
use --enable-threads=posix instead, which should have the same
effect.
* Code size estimates used by inlining heuristics for C,
Objective-C, C++ and Java have been redesigned significantly. As a
result the parameters of -finline-insns, --param
max-inline-insns-single and --param max-inline-insns-auto need to
be reconsidered.
* --param max-inline-slope and --param min-inline-insns have been
removed; they are not needed for the new bottom-up inlining
heuristics.
* The new unit-at-a-time compilation scheme has several
compatibility issues:
+ The order in which functions, variables, and top-level asm
statements are emitted may have changed. Code relying on some
particular ordering needs to be updated. The majority of such
top-level asm statements can be replaced by section
attributes.
+ Unreferenced static variables and functions are removed. This
may result in undefined references when an asm statement
refers to the variable/function directly. In that case either
the variable/function shall be listed in asm statement
operand or in the case of top-level asm statements the
attribute used shall be used to force function/variable to be
always output and considered as a possibly used by unknown
code.
For variables the attribute is accepted only by GCC 3.4 and
newer, while for earlier versions it is sufficient to use
unused to silence warnings about the variables not being
referenced. To keep code portable across different GCC
versions, you can use appropriate preprocessor conditionals.
+ Static functions now can use non-standard passing conventions
that may break asm statements calling functions directly.
Again the attribute used shall be used to prevent this
behavior.
As a temporary workaround, -fno-unit-at-a-time can be used, but
this scheme may not be supported by future releases of GCC.
* GCC 3.4 automatically places zero-initialized variables in the
.bss section on some operating systems. Versions of GNU Emacs up
to (and including) 21.3 will not work correctly when using this
optimization; you can use -fno-zero-initialized-in-bss to disable
it.
* If GCC 3.4 is configured with --enable-threads=posix (the default
on most targets that support pthreads) then _REENTRANT will be
defined unconditionally by some libstdc++ headers. C++ code which
relies on that macro to detect whether multi-threaded code is
being compiled might change in meaning, possibly resulting in
linker errors for single-threaded programs. Affected users of
[7]Boost should compile single-threaded code with
-DBOOST_DISABLE_THREADS. See Bugzilla for [8]more information.
General Optimizer Improvements
* Usability of the profile feedback and coverage testing has been
improved.
+ Performance of profiled programs has been improved by faster
profile merging code.
+ Better use of the profile feedback for optimization (loop
unrolling and loop peeling).
+ File locking support allowing fork() calls and parallel runs
of profiled programs.
+ Coverage file format has been redesigned.
+ gcov coverage tool has been improved.
+ make profiledbootstrap available to build a faster compiler.
Experiments made on i386 hardware showed an 11% speedup on
-O0 and a 7.5% speedup on -O2 compilation of a [9]large C++
testcase.
+ New value profiling pass enabled via -fprofile-values
+ New value profile transformations pass enabled via -fvpt aims
to optimize some code sequences by exploiting knowledge about
value ranges or other properties of the operands. At the
moment a conversion of expensive divisions into cheaper
operations has been implemented.
+ New -fprofile-generate and -fprofile-use command line options
to simplify the use of profile feedback.
* A new unit-at-a-time compilation scheme for C, Objective-C, C++
and Java which is enabled via -funit-at-a-time (and implied by
-O2). In this scheme a whole file is parsed first and optimized
later. The following basic inter-procedural optimizations are
implemented:
+ Removal of unreachable functions and variables
+ Discovery of local functions (functions with static linkage
whose address is never taken)
+ On i386, these local functions use register parameter passing
conventions.
+ Reordering of functions in topological order of the call
graph to enable better propagation of optimizing hints (such
as the stack alignments needed by functions) in the back end.
+ Call graph based out-of-order inlining heuristics which
allows to limit overall compilation unit growth (--param
inline-unit-growth).
Overall, the unit-at-a-time scheme produces a 1.3% improvement for
the SPECint2000 benchmark on the i386 architecture (AMD Athlon
CPU).
* More realistic code size estimates used by inlining for C,
Objective-C, C++ and Java. The growth of large functions can now
be limited via --param large-function-insns and --param
large-function-growth.
* A new cfg-level loop optimizer pass replaces the old loop
unrolling pass and adds two other loop transformations -- loop
peeling and loop unswitching -- and also uses the profile feedback
to limit code growth. (The three optimizations are enabled by
-funroll-loops, -fpeel-loops and -funswitch-loops flags,
respectively).
The old loop unroller still can be enabled by -fold-unroll-loops
and may produce better code in some cases, especially when the
webizer optimization pass is not run.
* A new web construction pass enabled via -fweb (and implied by -O3)
improves the quality of register allocation, CSE, first scheduling
pass and some other optimization passes by avoiding re-use of
pseudo registers with non-overlapping live ranges. The pass almost
always improves code quality but does make debugging difficult and
thus is not enabled by default by -O2
The pass is especially effective as cleanup after code duplication
passes, such as the loop unroller or the tracer.
* Experimental implementations of superblock or trace scheduling in
the second scheduling pass can be enabled via
-fsched2-use-superblocks and -fsched2-use-traces, respectively.
New Languages and Language specific improvements
Ada
* The Ada front end has been updated to include numerous bug fixes
and enhancements. These include:
+ Improved project file support
+ Additional set of warnings about potential wrong code
+ Improved error messages
+ Improved code generation
+ Improved cross reference information
+ Improved inlining
+ Better run-time check elimination
+ Better error recovery
+ More efficient implementation of unbounded strings
+ Added features in GNAT.Sockets, GNAT.OS_Lib,
GNAT.Debug_Pools, ...
+ New GNAT.xxxx packages (e.g. GNAT.Strings,
GNAT.Exception_Action)
+ New pragmas
+ New -gnatS switch replacing gnatpsta
+ Implementation of new Ada features (in particular limited
with, limited aggregates)
C/Objective-C/C++
* Precompiled headers are now supported. Precompiled headers can
dramatically speed up compilation of some projects. There are some
known defects in the current precompiled header implementation
that will result in compiler crashes in relatively rare
situations. Therefore, precompiled headers should be considered a
"technology preview" in this release. Read the manual for details
about how to use precompiled headers.
* File handling in the preprocessor has been rewritten. GCC no
longer gets confused by symlinks and hardlinks, and now has a
correct implementation of #import and #pragma once. These two
directives have therefore been un-deprecated.
* The undocumented extension that allowed C programs to have a label
at the end of a compound statement, which has been deprecated
since GCC 3.0, has been removed.
* The cast-as-lvalue extension has been removed for C++ and
deprecated for C and Objective-C. In particular, code like this:
int i;
(char) i = 5;
or this:
char *p;
((int *) p)++;
is no longer accepted for C++ and will not be accepted for C and
Objective-C in a future version.
* The conditional-expression-as-lvalue extension has been deprecated
for C and Objective-C. In particular, code like this:
int a, b, c;
(a ? b : c) = 2;
will not be accepted for C and Objective-C in a future version.
* The compound-expression-as-lvalue extension has been deprecated
for C and Objective-C. In particular, code like this:
int a, b;
(a, b) = 2;
will not be accepted for C and Objective-C in a future version. A
possible non-intrusive workaround is the following:
(*(a, &b)) = 2;
* Several [10]built-in functions such as __builtin_popcount for
counting bits, finding the highest and lowest bit in a word, and
parity have been added.
* The -fwritable-strings option has been deprecated and will be
removed.
* Many C math library functions are now recognized as built-ins and
optimized.
* The C, C++, and Objective-C compilers can now handle source files
written in any character encoding supported by the host C library.
The default input character set is taken from the current locale,
and may be overridden with the -finput-charset command line
option. In the future we will add support for inline encoding
markers.
C++
* G++ is now much closer to full conformance to the ISO/ANSI C++
standard. This means, among other things, that a lot of invalid
constructs which used to be accepted in previous versions will now
be rejected. It is very likely that existing C++ code will need to
be fixed. This document lists some of the most common issues.
* A hand-written recursive-descent C++ parser has replaced the
YACC-derived C++ parser from previous GCC releases. The new parser
contains much improved infrastructure needed for better parsing of
C++ source codes, handling of extensions, and clean separation
(where possible) between proper semantics analysis and parsing.
The new parser fixes many bugs that were found in the old parser.
* You must now use the typename and template keywords to
disambiguate dependent names, as required by the C++ standard.
struct K {
typedef int mytype_t;
};
template <class T1> struct A {
template <class T2> struct B {
void callme(void);
};
template <int N> void bar(void)
{
// Use 'typename' to tell the parser that T1::mytype_t names
// a type. This is needed because the name is dependent (in
// this case, on template parameter T1).
typename T1::mytype_t x;
x = 0;
}
};
template <class T> void template_func(void)
{
// Use 'template' to prefix member templates within
// dependent types (a has type A<T>, which depends on
// the template parameter T).
A<T> a;
a.template bar<0>();
// Use 'template' to tell the parser that B is a nested
// template class (dependent on template parameter T), and
// 'typename' because the whole A<T>::B<int> is
// the name of a type (again, dependent).
typename A<T>::template B<int> b;
b.callme();
}
void non_template_func(void)
{
// Outside of any template class or function, no names can be
// dependent, so the use of the keyword 'typename' and 'template'
// is not needed (and actually forbidden).
A<K> a;
a.bar<0>();
A<K>::B<float> b;
b.callme();
}
* In a template definition, unqualified names will no longer find
members of a dependent base (as specified by [temp.dep]/3 in the
C++ standard). For example,
template <typename T> struct B {
int m;
int n;
int f ();
int g ();
};
int n;
int g ();
template <typename T> struct C : B<T> {
void h ()
{
m = 0; // error
f (); // error
n = 0; // ::n is modified
g (); // ::g is called
}
};
You must make the names dependent, e.g. by prefixing them with
this->. Here is the corrected definition of C<T>::h,
template <typename T> void C<T>::h ()
{
this->m = 0;
this->f ();
this->n = 0
this->g ();
}
As an alternative solution, you may use using declarations instead
of this->:
template <typename T> struct C : B<T> {
using B<T>::m;
using B<T>::f;
using B<T>::n;
using B<T>::g;
void h ()
{
m = 0;
f ();
n = 0;
g ();
}
};
* In templates, all non-dependent names are now looked up and bound
at definition time (while parsing the code), instead of later when
the template is instantiated. For instance:
void foo(int);
template <int> struct A {
static void bar(void){
foo('a');
}
};
void foo(char);
int main()
{
A<0>::bar(); // Calls foo(int), used to call foo(char).
}
* In an explicit instantiation of a class template, you must
use class or struct before the template-id:
template <int N>
class A {};
template A<0>; // error, not accepted anymore
template class A<0>; // OK
* The "named return value" and "implicit typename" extensions have
been removed.
* Default arguments in function types have been deprecated and will
be removed.
* ARM-style name-injection of friend declarations has been
deprecated and will be removed. For example: struct S { friend
void f(); }; void g() { f(); } will not be accepted by future
versions of G++; instead a declaration of "f" will need to be
present outside of the scope of "S".
* Covariant returns are implemented for all but varadic functions
that require an adjustment.
* When -pedantic is used, G++ now issues errors about spurious
semicolons. For example,
namespace N {}; // Invalid semicolon.
void f() {}; // Invalid semicolon.
* G++ no longer accepts attributes for a declarator after the
initializer associated with that declarator. For example,
X x(1) __attribute__((...));
is no longer accepted. Instead, use:
X x __attribute__((...)) (1);
* Inside the scope of a template class, the name of the class itself
can be treated as either a class or a template. So GCC used to
accept the class name as argument of type template, and template
template parameter. However this is not C++ standard compliant.
Now the name is not treated as a valid template template argument
unless you qualify the name by its scope. For example, the code
below no longer compiles.
template <template <class> class TT> class X {};
template <class T> class Y {
X<Y> x; // Invalid, Y is always a type template parameter.
};
The valid code for the above example is
X< ::Y> x; // Valid.
(Notice the space between < and : to prevent GCC to interpret this
as a digraph for [.)
* Friend declarations that refer to template specializations are
rejected if the template has not already been declared. For
example,
template <typename T>
class C {
friend void f<> (C&);
};
is rejected. You must first declare f as a template,
template <typename T>
void f(T);
* In case of friend declarations, every name used in the friend
declaration must be accessible at the point of that declaration.
Previous versions of G++ used to be less strict about this and
allowed friend declarations for private class members, for
example. See the ISO C++ Standard Committee's [11]defect report
#209 for details.
* Declaration of member functions of class templates as friends are
supported. For example,
template <typename T> struct A {
void f();
};
class C {
template <typename T> friend void A<T>::f();
};
* You must use template <> to introduce template specializations, as
required by the standard. For example,
template <typename T>
struct S;
struct S<int> { };
is rejected. You must write,
template <> struct S<int> {};
* G++ used to accept code like this,
struct S {
int h();
void f(int i = g());
int g(int i = h());
};
This behavior is not mandated by the standard. Now G++ issues an
error about this code. To avoid the error, you must move the
declaration of g before the declaration of f. The default
arguments for g must be visible at the point where it is called.
* The C++ ABI Section 3.3.3 specifications for the array
construction routines __cxa_vec_new2 and __cxa_vec_new3 were
changed to return NULL when the allocator argument returns NULL.
These changes are incorporated into the libstdc++ runtime library.
* Using a name introduced by a typedef in a friend declaration or in
an explicit instantiation is now rejected, as specified by the ISO
C++ standard.
class A;
typedef A B;
class C {
friend class B; // error, no typedef name here
friend B; // error, friend always needs class/struct/enum
friend class A; // OK
};
template <int> class Q {};
typedef Q<0> R;
template class R; // error, no typedef name here
template class Q<0>; // OK
* When allocating an array with a new expression, GCC used to allow
parentheses around the type name. This is actually ill-formed and
it is now rejected:
int* a = new (int)[10]; // error, not accepted anymore
int* a = new int[10]; // OK
* When binding an rvalue of class type to a reference, the copy
constructor of the class must be accessible. For instance,
consider the following code:
class A
{
public:
A();
private:
A(const A&); // private copy ctor
};
A makeA(void);
void foo(const A&);
void bar(void)
{
foo(A()); // error, copy ctor is not accessible
foo(makeA()); // error, copy ctor is not accessible
A a1;
foo(a1); // OK, a1 is a lvalue
}
This might be surprising at first sight, especially since most
popular compilers do not correctly implement this rule
([12]further details).
* When forming a pointer to member or a pointer to member function,
access checks for class visibility (public, protected, private)
are now performed using the qualifying scope of the name itself.
This is better explained with an example:
class A
{
public:
void pub_func();
protected:
void prot_func();
private:
void priv_func();
};
class B : public A
{
public:
void foo()
{
&A::pub_func; // OK, pub_func is accessible through A
&A::prot_func; // error, cannot access prot_func through A
&A::priv_func; // error, cannot access priv_func through A
&B::pub_func; // OK, pub_func is accessible through B
&B::prot_func; // OK, can access prot_func through B (within B)
&B::priv_func; // error, cannot access priv_func through B
}
};
Runtime Library (libstdc++)
* Optimization work:
+ Streamlined streambuf, filebuf, separate synched with C
Standard I/O streambuf.
+ All formatted I/O now uses cached locale information.
+ STL optimizations (memory/speed for list, red-black trees as
used by sets and maps).
+ More use of GCC builtins.
+ String optimizations (avoid contention on
increment/decrement-and-test of the reference count in the
empty-string object, constructor from input_iterators
speedup).
* Static linkage size reductions.
* Large File Support (files larger than 2 GB on 32-bit systems).
* Wide character and variable encoding filebuf work (UTF-8,
Unicode).
* Generic character traits.
* Also support wchar_t specializations on Mac OS 10.3.x, FreeBSD
5.x, Solaris 2.7 and above, AIX 5.x, Irix 6.5.
* The allocator class is now standard-conformant, and two additional
extension allocators have been added, mt_alloc and
bitmap_allocator.
* PCH support: -include bits/stdc++.h (2x compile speedup).
* Rewrote __cxa_demangle with support for C++ style allocators.
* New debug modes for STL containers and iterators.
* Testsuite rewrite: five times as many tests, plus increasingly
sophisticated tests, including I/O, MT, multi-locale, wide and
narrow characters.
* Use current versions of GNU "autotools" for build/configuration.
Objective-C
* The Objective-C front end has been updated to include the numerous
bug fixes and enhancements previously available only in Apple's
version of GCC. These include:
+ Structured exception (@try... @catch... @finally, @throw) and
synchronization (@synchronized) support. These are accessible
via the -fobjc-exceptions switch; as of this writing, they
may only be used in conjunction with -fnext-runtime on Mac OS
X 10.3 and later. See [13]Options Controlling Objective-C
Dialect for more information.
+ An overhaul of @encode logic. The C99 _Bool and C++ bool type
may now be encoded as 'B'. In addition, the back-end/codegen
dependencies have been removed.
+ An overhaul of message dispatch construction, ensuring that
the various receiver types (and casts thereof) are handled
properly, and that correct diagnostics are issued.
+ Support for "Zero-Link" (-fzero-link) and "Fix-and-Continue"
(-freplace-objc-classes) debugging modes, currently available
on Mac OS X 10.3 and later. See [14]Options Controlling
Objective-C Dialect for more information.
+ Access to optimized runtime entry points (-fno-nil-receivers
) on the assumption that message receivers are never nil.
This is currently available on Mac OS X 10.3 and later. See
[15]Options Controlling Objective-C Dialect for more
information.
Java
* Compiling a .jar file will now cause non-.class entries to be
automatically compiled as resources.
* libgcj has been ported to Darwin.
* Jeff Sturm has adapted Jan Hubicka's call graph optimization code
to gcj.
* libgcj has a new gcjlib URL type; this lets URLClassLoader load
code from shared libraries.
* libgcj has been much more completely merged with [16]GNU
Classpath.
* Class loading is now much more correct; in particular the caller's
class loader is now used when that is required.
* [17]Eclipse 2.x will run out of the box using gij.
* Parts of java.nio have been implemented. Direct and indirect
buffers work, as do fundamental file and socket operations.
* java.awt has been improved, though it is still not ready for
general use.
* The HTTP protocol handler now uses HTTP/1.1 and can handle the
POST method.
* The MinGW port has matured. Enhancements include socket timeout
support, thread interruption, improved Runtime.exec() handling and
support for accented characters in filenames.
Fortran
* Fortran improvements are listed in the [18]Fortran documentation.
New Targets and Target Specific Improvements
Alpha
* Several [19]built-in functions have been added such as
__builtin_alpha_zap to allow utilizing the more obscure
instructions of the CPU.
* Parameter passing of complex arguments has changed to match the
[20]ABI. This change is incompatible with previous GCC versions,
but does fix compatibility with the Tru64 compiler and several
corner cases where GCC was incompatible with itself.
ARM
* Nicolas Pitre has contributed his hand-coded floating-point
support code for ARM. It is both significantly smaller and faster
than the existing C-based implementation, even when building
applications for Thumb. The arm-elf configuration has been
converted to use the new code.
* Support for the Intel's iWMMXt architecture, a second generation
XScale processor, has been added. Enabled at run time with the
-mcpu=iwmmxt command line switch.
* A new ARM target has been added: arm-wince-pe. This is similar to
the arm-pe target, but it defaults to using the APCS32 ABI.
* The existing ARM pipeline description has been converted to the
use the [21]DFA processor pipeline model. There is not much change
in code performance, but the description is now [22]easier to
understand.
* Support for the Cirrus EP9312 Maverick floating point co-processor
added. Enabled at run time with the -mcpu=ep9312 command line
switch. Note however that the multilibs to support this chip are
currently disabled in gcc/config/arm/t-arm-elf, so if you want to
enable their production you will have to uncomment the entries in
that file.
H8/300
* Support for long long has been added.
* Support for saveall attribute has been added.
* Pavel Pisa contributed hand-written 32-bit-by-32-bit division code
for H8/300H and H8S, which is much faster than the previous
implementation.
* A lot of small performance improvements.
IA-32/AMD64 (x86-64)
* Tuning for K8 (AMD Opteron/Athlon64) core is available via
-march=k8 and -mcpu=k8.
* Scalar SSE code generation carefully avoids reformatting
penalties, hidden dependencies and minimizes the number of uops
generated on both Intel and AMD CPUs.
* Vector MMX and SSE operands are now passed in registers to improve
performance and match the argument passing convention used by the
Intel C++ Compiler. As a result it is not possible to call
functions accepting vector arguments compiled by older GCC
version.
* Conditional jump elimination is now more aggressive on modern
CPUs.
* The Athlon ports has been converted to use the DFA processor
pipeline description.
* Optimization of indirect tail calls is now possible in a similar
fashion as direct sibcall optimization.
* Further small performance improvements.
* -m128bit-long-double is now less buggy.
* __float128 support in 64-bit compilation.
* Support for data structures exceeding 2GB in 64-bit mode.
* -mcpu has been renamed to -mtune.
IA-64
* Tuning code for the Itanium 2 processor has been added. The
generation of code tuned for Itanium 2 (option -mtune=itanium2) is
enabled by default now. To generate code tuned for Itanium 1 the
option -mtune=itanium1 should be used.
* [23]DFA processor pipeline descriptions for the IA-64 processors
have been added. This resulted in about 3% improvement on the
SPECInt2000 benchmark for Itanium 2.
* Instruction bundling for the IA-64 processors has been rewritten
using the DFA pipeline hazard recognizer. It resulted in about 60%
compiler speedup on the SPECInt2000 C programs.
M32R
* Support for the M32R/2 processor has been added by Renesas.
* Support for an M32R Linux target and PIC code generation has been
added by Renesas.
M68000
* Bernardo Innocenti (Develer S.r.l.) has contributed the
m68k-uclinux target, based on former work done by Paul Dale
(SnapGear Inc.). Code generation for the ColdFire processors
family has been enhanced and extended to support the MCF 53xx and
MCF 54xx cores, integrating former work done by Peter Barada
(Motorola).
MIPS
Processor-specific changes
* Support for the RM7000 and RM9000 processors has been added. It
can be selected using the -march compiler option and should work
with any MIPS I (mips-*) or MIPS III (mips64-*) configuration.
* Support for revision 2 of the MIPS32 ISA has been added. It can be
selected with the command-line option -march=mips32r2.
* There is a new option, -mfix-sb1, to work around certain SB-1
errata.
Configuration
* It is possible to customize GCC using the following configure-time
options:
+ --with-arch, which specifies the default value of the -march
option.
+ --with-tune, which specifies the default value of the -mtune
option.
+ --with-abi, which specifies the default ABI.
+ --with-float=soft, which tells GCC to use software floating
point by default.
+ --with-float=hard, which tells GCC to use hardware floating
point by default.
* A 64-bit GNU/Linux port has been added. The associated
configurations are mips64-linux-gnu and mips64el-linux-gnu.
* The 32-bit GNU/Linux port now supports Java.
* The IRIX 6 configuration now supports the o32 ABI and will build
o32 multilibs by default. This support is compatible with both
binutils and the SGI tools, but note that several features,
including debugging information and DWARF2 exception handling, are
only available when using the GNU assembler. Use of the GNU
assembler and linker (version 2.15 or above) is strongly
recommended.
* The IRIX 6 configuration now supports 128-bit long doubles.
* There are two new RTEMS-specific configurations, mips-rtems and
mipsel-rtems.
* There are two new *-elf configurations, mipsisa32r2-elf and
mipsisa32r2el-elf.
General
* Several [24]ABI bugs have been fixed. Unfortunately, these changes
will break binary compatibility with earlier releases.
* GCC can now use explicit relocation operators when generating
-mabicalls code. This behavior is controlled by -mexplicit-relocs
and can have several performance benefits. For example:
+ It allows for more optimization of GOT accesses, including
better scheduling and redundancy elimination.
+ It allows sibling calls to be implemented as jumps.
+ n32 and n64 leaf functions can use a call-clobbered global
pointer instead of $28.
+ The code to set up $gp can be removed from functions that
don't need it.
* A new option, -mxgot, allows the GOT to be bigger than 64k. This
option is equivalent to the assembler's -xgot option and should be
used instead of -Wa,-xgot.
* Frame pointer elimination is now supported when generating 64-bit
MIPS16 code.
* Inline block moves have been optimized to take more account of
alignment information.
* Many internal changes have been made to the MIPS port, mostly
aimed at reducing the reliance on assembler macros.
PowerPC
* GCC 3.4 releases have a number of fixes for PowerPC and PowerPC64
[25]ABI incompatibilities regarding the way parameters are passed
during functions calls. These changes may result in
incompatibility between code compiled with GCC 3.3 and GCC 3.4.
PowerPC Darwin
* Support for shared/dylib gcc libraries has been added. It is
enabled by default on powerpc-apple-darwin7.0.0 and up.
* Libgcj is enabled by default. On systems older than
powerpc-apple-darwin7.0.0 you need to install [26]dlcompat.
* 128-bit IBM extended precision format support added for long
double.
PowerPC64 GNU/Linux
* By default, PowerPC64 GNU/Linux now uses natural alignment of
structure elements. The old four byte alignment for double, with
special rules for a struct starting with a double, can be chosen
with -malign-power. This change may result in incompatibility
between code compiled with GCC 3.3 and GCC 3.4.
* -mabi=altivec is now the default rather than -mabi=no-altivec.
* 128-bit IBM extended precision format support added for long
double.
S/390 and zSeries
* New command-line options allow to specify the intended execution
environment for generated code:
+ -mesa/-mzarch allows to specify whether to generate code
running in ESA/390 mode or in z/Architecture mode (this is
applicable to 31-bit code only).
+ -march allows to specify a minimum processor architecture
level (g5, g6, z900, or z990).
+ -mtune allows to specify which processor to tune for.
* It is possible to customize GCC using the following configure-time
options:
+ --with-mode, which specifies whether to default to assuming
ESA/390 or z/Architecture mode.
+ --with-arch, which specifies the default value of the -march
option.
+ --with-tune, which specifies the default value of the -mtune
option.
* Support for the z990 processor has been added, and can be selected
using -march=z990 or -mtune=z990. This includes instruction
scheduling tuned for the superscalar instruction pipeline of the
z990 processor as well as support for all new instructions
provided by the long-displacement facility.
* Support to generate 31-bit code optimized for zSeries processors
(running in ESA/390 or in z/Architecture mode) has been added.
This can be selected using -march=z900 and -mzarch respectively.
* Instruction scheduling for the z900 and z990 processors now uses
the DFA pipeline hazard recognizer.
* GCC no longer generates code to maintain a stack backchain,
previously used to generate stack backtraces for debugging
purposes. As replacement that does not incur runtime overhead,
DWARF-2 call frame information is provided by GCC; this is
supported by GDB 6.1. The old behavior can be restored using the
-mbackchain option.
* The stack frame size of functions may now exceed 2 GB in 64-bit
code.
* A port for the 64-bit IBM TPF operating system has been added; the
configuration is s390x-ibm-tpf. This configuration is supported as
cross-compilation target only.
* Various changes to improve the generated code have been
implemented, including:
+ GCC now uses the MULTIPLY AND ADD and MULTIPLY AND SUBTRACT
instructions to significantly speed up many floating-point
applications.
+ GCC now uses the ADD LOGICAL WITH CARRY and SUBTRACT LOGICAL
WITH BORROW instructions to speed up long long arithmetic.
+ GCC now uses the SEARCH STRING instruction to implement
strlen().
+ In many cases, function call overhead for 31-bit code has
been reduced by placing the literal pool after the function
code instead of after the function prolog.
+ Register 14 is no longer reserved in 64-bit code.
+ Handling of global register variables has been improved.
SPARC
* The option -mflat is deprecated.
* Support for large (> 2GB) frames has been added to the 64-bit
port.
* Several [27]ABI bugs have been fixed. Unfortunately, these changes
will break binary compatibility with earlier releases.
* The default debugging format has been switched from STABS to
DWARF-2 for 32-bit code on Solaris 7 and later. DWARF-2 is already
the default debugging format for 64-bit code on Solaris.
SuperH
* Support for the SH2E processor has been added. Enabled at run time
with the -m2e command line switch, or at configure time by
specifying sh2e as the machine part of the target triple.
V850
* Support for the Mitsubishi V850E1 processor has been added. This
is a variant of the V850E processor with some additional debugging
instructions.
Xtensa
* Several ABI bugs have been fixed. Unfortunately, these changes
break binary compatibility with earlier releases.
+ For big-endian processors, the padding of aggregate return
values larger than a word has changed. If the size of an
aggregate return value is not a multiple of 32 bits, previous
versions of GCC inserted padding in the most-significant
bytes of the first return value register. Aggregates larger
than a word are now padded in the least-significant bytes of
the last return value register used. Aggregates smaller than
a word are still padded in the most-significant bytes. The
return value padding has not changed for little-endian
processors.
+ Function arguments with 16-byte alignment are now properly
aligned.
+ The implementation of the va_list type has changed. A va_list
value created by va_start from a previous release cannot be
used with va_arg from this release, or vice versa.
* More processor configuration options for Xtensa processors are
supported:
+ the ABS instruction is now optional;
+ the ADDX* and SUBX* instructions are now optional;
+ an experimental CONST16 instruction can be used to synthesize
constants instead of loading them from constant pools.
These and other Xtensa processor configuration options can no
longer be enabled or disabled by command-line options; the
processor configuration must be specified by the xtensa-config.h
header file when building GCC. Additionally, the
-mno-serialize-volatile option is no longer supported.
Obsolete Systems
Support for a number of older systems has been declared obsolete in
GCC 3.4. Unless there is activity to revive them, the next release of
GCC will have their sources permanently removed.
All configurations of the following processor architectures have been
declared obsolete:
* Mitsubishi D30V, d30v-*
* AT&T DSP1600 and DSP1610, dsp16xx-*
* Intel 80960, i960
Also, some individual systems have been obsoleted:
* ARM Family
+ Support for generating code for operation in APCS/26 mode
(-mapcs-26).
* IBM ESA/390
+ "Bigfoot" port, i370-*. (The other port, s390-*, is actively
maintained and supported.)
* Intel 386 family
+ MOSS, i?86-moss-msdos and i?86-*-moss*
+ NCR 3000 running System V r.4, i?86-ncr-sysv4*
+ FreeBSD with a.out object format, i?86-*-freebsd*aout* and
i?86-*-freebsd2*
+ Linux with a.out object format, i?86-linux*aout*
+ Linux with libc5, a.k.a. glibc1, i?86-linux*libc1*
+ Interix versions before Interix 3, i?86-*-interix
+ Mach microkernel, i?86-mach*
+ SCO UnixWare with UDK, i?86-*-udk*
+ Generic System V releases 1, 2, and 3, i?86-*-sysv[123]*
+ VSTa microkernel, i386-*-vsta
* Motorola M68000 family
+ HPUX, m68k-hp-hpux* and m68000-hp-hpux*
+ NetBSD with a.out object format (before NetBSD 1.4),
m68k-*-*-netbsd* except m68k-*-*-netbsdelf*
+ Generic System V r.4, m68k-*-sysv4*
* VAX
+ Generic VAX, vax-*-* (This is generic VAX only; we have not
obsoleted any VAX triples for specific operating systems.)
Documentation improvements
Other significant improvements
* The build system has undergone several significant cleanups.
Subdirectories will only be configured if they are being built,
and all subdirectory configures are run from the make command. The
top level has been autoconfiscated.
* Building GCC no longer writes to its source directory. This should
help those wishing to share a read-only source directory over NFS
or build from a CD. The exceptions to this feature are if you
configure with either --enable-maintainer-mode or
--enable-generated-files-in-srcdir.
* The -W warning option has been renamed to -Wextra, which is more
easily understood. The older spelling will be retained for
backwards compatibility.
* Substantial improvements in compile time have been made,
particularly for non-optimizing compilations.
_________________________________________________________________
GCC 3.4.0
Bug Fixes
A vast number of bugs have been fixed in 3.4.0, too many to publish a
complete list here. [28]Follow this link to query the Bugzilla
database for the list of over 900 bugs fixed in 3.4.0. This is the
list of all bugs marked as resolved and fixed in 3.4.0 that are not
flagged as 3.4 regressions.
_________________________________________________________________
GCC 3.4.1
Bug Fixes
This section lists the problem reports (PRs) from GCC's bug tracking
system that are known to be fixed in the 3.4.1 release. This list
might not be complete (that is, it is possible that some PRs that have
been fixed are not listed here).
Bootstrap failures
* [29]10129 Ada bootstrap fails on PPC-Darwin - invalid assembler
emitted - PIC related
* [30]14576 [ARM] ICE in libiberty when building gcc-3.4 for arm-elf
* [31]14760 A bug in configure.in prevents using both
--program-suffix and --program-prefix
* [32]14671 [hppa64] bootstrap fails: ICE in
save_call_clobbered_regs, in caller_save.c
* [33]15093 [alpha][Java] make bootstrap fails to configure libffi
on Alpha
* [34]15178 Solaris 9/x86 fails linking after stage 3
Multi-platform internal compiler errors (ICEs)
* [35]12753 (preprocessor) Memory corruption in preprocessor on bad
input
* [36]13985 ICE in gcc.c-torture/compile/930621-1.c
* [37]14810 (c++) tree check failures with invalid code involving
templates
* [38]14883 (c++) ICE on invalid code, in cp_parser_lookup_name, in
cp/parser.c
* [39]15044 (c++) ICE on syntax error, template header
* [40]15057 (c++) Compiling of conditional value throw constructs
cause a segmentation violation
* [41]15064 (c++) typeid of template parameter gives ICE
* [42]15142 (c++) ICE when passing a string where a char* is
expected in a throw statement
* [43]15159 ICE in rtl_verify_flow_info_1
* [44]15165 (c++) ICE in instantiate_template
* [45]15193 Unary minus using pointer to V4SF vector causes
-fforce-mem to exhaust all memory
* [46]15209 (c++) Runs out of memory with packed structs
* [47]15227 (c++) Trouble with invalid function definition
* [48]15285 (c++) instantiate_type ICE when forming pointer to
template function
* [49]15299 (c++) ICE in resolve_overloaded_unification
* [50]15329 (c++) ICE on constructor of member template
* [51]15550 ICE in extract_insn, in recog.c
* [52]15554 (c++) ICE in tsubst_copy, in cp/pt.c
* [53]15640 (c++) ICE on invalid code in arg_assoc, in
cp/name-lookup.c
* [54]15666 [unit-at-a-time] Gcc abort on valid code
* [55]15696 (c++) ICE with bad pointer-to-member code
* [56]15701 (c++) ICE with friends and template template parameter
* [57]15761 ICE in do_SUBST, in combine.c
* [58]15829 (c++) ICE on Botan-1.3.13 due to -funroll-loops
Ada
* [59]14538 All RTEMS targets broken for gnat
C front end
* [60]12391 missing warning about assigning to an incomplete type
* [61]14649 atan(1.0) should not be a constant expression
* [62]15004 [unit-at-a-time] no warning for unused paramater in
static function
* [63]15749 --pedantic-errors behaves differently from --pedantic
with C-compiler on GNU/Linux
C++ compiler and library
* [64]10646 non-const reference is incorrectly matched in a "const
T" partial specialization
* [65]12077 wcin.rdbuf()->in_avail() return value too high
* [66]13598 enc_filebuf doesn't work
* [67]14211 const_cast returns lvalue but should be rvalue
* [68]14220 num_put::do_put() undesired float/double behavior
* [69]14245 problem with user-defined allocators in
std::basic_string
* [70]14340 libstdc++ Debug mode: failure to convert iterator to
const_iterator
* [71]14600 __gnu_cxx::stdio_sync_filebuf should expose internal
FILE*
* [72]14668 no warning anymore for reevaluation of declaration
* [73]14775 LFS (large file support) tests missing
* [74]14821 Duplicate namespace alias declaration should not
conflict
* [75]14930 Friend declaration ignored
* [76]14932 cannot use offsetof to get offsets of array elements in
g++ 3.4.0
* [77]14950 [non unit-at-a-time] always_inline does not mix with
templates and -O0
* [78]14962 g++ ignores #pragma redefine_extname
* [79]14975 Segfault on low-level write error during imbue
* [80]15002 Linewise stream input is unusably slow (std::string
slow)
* [81]15025 compiler accepts redeclaration of template as
non-template
* [82]15046 [arm] Math functions misdetected by cross configuration
* [83]15069 a bit test on a variable of enum type is miscompiled
* [84]15074 g++ -lsupc++ still links against libstdc++
* [85]15083 spurious "statement has no effect" warning
* [86]15096 parse error with templates and pointer to const member
* [87]15287 combination of operator[] and operator .* fails in
templates
* [88]15317 __attribute__ unused in first parameter of constructor
gives error
* [89]15337 sizeof on incomplete type diagnostic
* [90]15361 bitset<>::_Find_next fails
* [91]15412 _GLIBCXX_ symbols symbols defined and used in different
namespaces
* [92]15427 valid code results in incomplete type error
* [93]15471 Incorrect member pointer offsets in anonymous
structs/unions
* [94]15503 nested template problem
* [95]15507 compiler hangs while laying out union
* [96]15542 operator & and template definitions
* [97]15565 SLES9: leading + sign for unsigned int with showpos
* [98]15625 friend defined inside a template fails to find static
function
* [99]15629 Function templates, overloads, and friend name injection
* [100]15742 'noreturn' attribute ignored in method of template
functions.
* [101]15775 Allocator::pointer consistently ignored
* [102]15821 Duplicate namespace alias within namespace rejected
* [103]15862 'enum yn' fails (confict with undeclared builtin)
* [104]15875 rejects pointer to member in template
* [105]15877 valid code using templates and anonymous enums is
rejected
* [106]15947 Puzzling error message for wrong destructor declaration
in template class
* [107]16020 cannot copy __gnu_debug::bitset
* [108]16154 input iterator concept too restrictive
* [109]16174 deducing top-level consts
Java
* [110]14315 Java compiler is not parallel make safe
Fortran
* [111]15151 [g77] incorrect logical i/o in 64-bit mode
Objective-C
* [112]7993 private variables cannot be shadowed in subclasses
Optimization bugs
* [113]15228 useless copies of floating point operands
* [114]15345 [non-unit-at-a-time] unreferenced nested inline
functions not optimized away
* [115]15945 Incorrect floating point optimization
* [116]15526 ftrapv aborts on 0 * (-1)
* [117]14690 Miscompiled POOMA tests
* [118]15112 GCC generates code to write to unchanging memory
Preprocessor
* [119]15067 Minor glitch in the source of cpp
Main driver program bugs
* [120]1963 collect2 interprets -oldstyle_liblookup as -o
ldstyle_liblookup
x86-specific (Intel/AMD)
* [121]15717 Error: can't resolve `L0' {*ABS* section} - `xx' {*UND*
section}
HPPA-specific
* [122]14782 GCC produces an unaligned data access at -O2
* [123]14828 FAIL: gcc.c-torture/execute/20030408-1.c execution, -O2
* [124]15202 ICE in reload_cse_simplify_operands, in postreload.c
IA64-specific
* [125]14610 __float80 constants incorrectly emitted
* [126]14813 init_array sections are initialized in the wrong order
* [127]14857 GCC segfault on duplicated asm statement
* [128]15598 Gcc 3.4 ICE on valid code
* [129]15653 Gcc 3.4 ICE on valid code
MIPS-specific
* [130]15189 wrong filling of delay slot with -march=mips1 -G0
-mno-split-addresses -mno-explicit-relocs
* [131]15331 Assembler error building gnatlib on IRIX 6.5 with GNU
as 2.14.91
* [132]16144 Bogus reference to __divdf3 when -O1
* [133]16176 Miscompilation of unaligned data in MIPS backend
PowerPC-specific
* [134]11591 ICE in gcc.dg/altivec-5.c
* [135]12028 powerpc-eabispe produces bad sCOND operation
* [136]14478 rs6000 geu/ltu patterns generate incorrect code
* [137]14567 long double and va_arg complex args
* [138]14715 Altivec stack layout may overlap gpr save with stack
temps
* [139]14902 (libstdc++) Stream checking functions fail when
-pthread option is used.
* [140]14924 Compiler ICE on valid code
* [141]14960 -maltivec affects vector return with -mabi=no-altivec
* [142]15106 vector varargs failure passing from altivec to
non-altivec code for -m32
* [143]16026 ICE in function.c:4804, assign_parms, when -mpowerpc64
& half-word operation
* [144]15191 -maltivec -mabi=no-altivec results in mis-aligned lvx
and stvx
* [145]15662 Segmentation fault when an exception is thrown - even
if try and catch are specified
s390-specific
* [146]15054 Bad code due to overlapping stack temporaries
SPARC-specific
* [147]15783 ICE with union assignment in 64-bit mode
* [148]15626 GCC 3.4 emits "ld: warning: relocation error:
R_SPARC_UA32"
x86-64-specific
* [149]14326 boehm-gc hardcodes to 3DNow! prefetch for x86_64
* [150]14723 Backported -march=nocona from mainline
* [151]15290 __float128 failed to pass to function properly
Cygwin/Mingw32-specific
* [152]15250 Option -mms-bitfields support on GCC 3.4 is not
conformant to MS layout
* [153]15551 -mtune=pentium4 -O2 with sjlj EH breaks stack probe
worker on windows32 targets
Bugs specific to embedded processors
* [154]8309 [m68k] -m5200 produces erroneous SImode set of short
varaible on stack
* [155]13250 [SH] Gcc code for rotation clobbers the register, but
gcc continues to use the register as if it was not clobbered
* [156]13803 [coldfire] movqi operand constraints too restrictivefor
TARGET_COLDFIRE
* [157]14093 [SH] ICE for code when using -mhitachi option in SH
* [158]14457 [m6811hc] ICE with simple c++ source
* [159]14542 [m6811hc] ICE on simple source
* [160]15100 [SH] cc1plus got hang-up on
libstdc++-v3/testsuite/abi_check.cc
* [161]15296 [CRIS] Delayed branch scheduling causing invalid code
on cris-*
* [162]15396 [SH] ICE with -O2 -fPIC
* [163]15782 [coldfire] m68k_output_mi_thunk emits wrong code for
ColdFire
Testsuite problems (compiler not affected)
* [164]11610 libstdc++ testcases 27_io/* don't work properly
remotely
* [165]15488 (libstdc++) possibly insufficient file permissions for
executing test suite
* [166]15489 (libstdc++) testsuite_files determined incorrectly
Documentation bugs
* [167]13928 (libstdc++) no whatis info in some man pages generated
by doxygen
* [168]14150 Ada documentation out of date
* [169]14949 (c++) Need to document method visibility changes
* [170]15123 libstdc++-doc: Allocators.3 manpage is empty
_________________________________________________________________
GCC 3.4.2
Bug Fixes
This section lists the problem reports (PRs) from GCC's bug tracking
system that are known to be fixed in the 3.4.2 release. This list
might not be complete (that is, it is possible that some PRs that have
been fixed are not listed here).
Bootstrap failures and issues
* [171]16469 [mips-sgi-irix5.3] bootstrap fails in
libstdc++-v3/testsuite
* [172]16344 [hppa-linux-gnu] libstdc++'s PCH built by
profiledbootstrap does not work with the built compiler
* [173]16842 [Solaris/x86] mkheaders can not find mkheaders.conf
Multi-platform internal compiler errors (ICEs)
* [174]12608 (c++) ICE: expected class 't', have 'x' (error_mark) in
cp_parser_class_specifier, in cp/parser.c
* [175]14492 ICE in loc_descriptor_from_tree, in dwarf2out.c
* [176]15461 (c++) ICE due to NRV and inlining
* [177]15890 (c++) ICE in c_expand_expr, in c-common.c
* [178]16180 ICE: segmentation fault in RTL optimization
* [179]16224 (c++) ICE in write_unscoped_name (template/namespace)
* [180]16408 ICE: in delete_insn, in cfgrtl.c
* [181]16529 (c++) ICE for: namespace-alias shall not be declared as
the name of any other entity
* [182]16698 (c++) ICE with exceptions and declaration of
__cxa_throw
* [183]16706 (c++) ICE in finish_member_declaration, in
cp/semantics.c
* [184]16810 (c++) Legal C++ program with cast gives ICE in
build_ptrmemfunc
* [185]16851 (c++) ICE when throwing a comma expression
* [186]16870 (c++) Boost.Spirit causes ICE in tsubst, in cp/pt.c
* [187]16904 (c++) ICE in finish_class_member_access_expr, in
cp/typeck.c
* [188]16905 (c++) ICE (segfault) with exceptions
* [189]16964 (c++) ICE in cp_parser_class_specifier due to
redefinition
* [190]17068 (c++) ICE: tree check: expected class 'd', have 'x'
(identifier_node) in dependent_template_p, in cp/pt.c
Preprocessor bugs
* [191]16366 Preprocessor option -remap causes memory corruption
Optimization
* [192]15345 unreferenced nested inline functions not optimized away
* [193]16590 Incorrect execution when compiling with -O2
* [194]16693 Bitwise AND is lost when used within a cast to an enum
of the same precision
* [195]17078 Jump into if(0) substatement fails
Problems in generated debug information
* [196]13956 incorrect stabs for nested local variables
C front end bugs
* [197]16684 GCC should not warn about redundant redeclarations of
built-ins
C++ compiler and library
* [198]12658 Thread safety problems in locale::global() and
locale::locale()
* [199]13092 g++ accepts invalid pointer-to-member conversion
* [200]15320 Excessive memory consumption
* [201]16246 Incorrect template argument deduction
* [202]16273 Memory exhausted when using nested classes and virtual
functions
* [203]16401 ostringstream in gcc 3.4.x very slow for big data
* [204]16411 undefined reference to
__gnu_cxx::stdio_sync_filebuf<char, std::char_traits<char>
>::file()
* [205]16489 G++ incorrectly rejects use of a null constant integral
expression as a null constant pointer
* [206]16618 offsetof fails with constant member
* [207]16637 syntax error reported for valid input code
* [208]16717 __attribute__((constructor)) broken in C++
* [209]16813 compiler error in DEBUG version of range insertion
std::map::insert
* [210]16853 pointer-to-member initialization from incompatible one
accepted
* [211]16889 ambiguity is not detected
* [212]16959 Segmentation fault in ios_base::sync_with_stdio
Java compiler and library
* [213]7587 direct threaded interpreter not thread-safe
* [214]16473 ServerSocket accept() leaks file descriptors
* [215]16478 Hash synchronization deadlock with finalizers
Alpha-specific
* [216]10695 ICE in dwarf2out_frame_debug_expr, in dwarf2out.c
* [217]16974 could not split insn (ice in final_scan_insn, in
final.c)
x86-specific
* [218]16298 ICE in output_operand
* [219]17113 ICE with SSE2 intrinsics
x86-64 specific
* [220]14697 libstdc++ couldn't find 32bit libgcc_s
MIPS-specific
* [221]15869 [mips64] No NOP after LW (with -mips1 -O0)
* [222]16325 [mips64] value profiling clobbers gp on mips
* [223]16357 [mipsisa64-elf] ICE copying 7 bytes between extern
char[]s
* [224]16380 [mips64] Use of uninitialised register after dbra
conversion
* [225]16407 [mips64] Unaligned access to local variables
* [226]16643 [mips64] verify_local_live_at_start ICE after
crossjumping & cfgcleanup
ARM-specific
* [227]15927 THUMB -O2: strength-reduced iteration variable ends up
off by 1
* [228]15948 THUMB: ICE with non-commutative cbranch
* [229]17019 THUMB: bad switch statement in md code for
addsi3_cbranch_scratch
IA64-specific
* [230]16130 ICE on valid code: in bundling, in config/ia64/ia64.c
(-mtune=merced)
* [231]16142 ICE on valid code: in bundling, in config/ia64/ia64.c
(-mtune=itanium)
* [232]16278 Gcc failed to build Linux kernel with -mtune=merced
* [233]16414 ICE on valid code: typo in comparison of asm_noperands
result
* [234]16445 ICE on valid code: don't count ignored insns
* [235]16490 ICE (segfault) while compiling with -fprofile-use
* [236]16683 ia64 does not honor SUBTARGET_EXTRA_SPECS
PowerPC-specific
* [237]16195 (ppc64): Miscompilation of GCC 3.3.x by 3.4.x
* [238]16239 ICE on ppc64 (mozilla 1.7 compile, -O1 -fno-exceptions
issue)
SPARC-specific
* [239]16199 ICE while compiling apache 2.0.49
* [240]16416 -m64 doesn't imply -mcpu=v9 anymore
* [241]16430 ICE when returning non-C aggregates larger than 16
bytes
Bugs specific to embedded processors
* [242]16379 [m32r] can't output large model function call of memcpy
* [243]17093 [m32r] ICE with -msdata=use -O0
* [244]17119 [m32r] ICE at switch case 0x8000
DJGPP-specific
* [245]15928 libstdc++ in 3.4.x doesn't cross-compile for djgpp
Alpha Tru64-specific
* [246]16210 libstdc++ gratuitously omits "long long" I/O
Testsuite, documentation issues (compiler is not affected):
* [247]15488 (libstdc++) possibly insufficient file permissions for
executing test suite
* [248]16250 ada/doctools runs makeinfo even in release tarball
_________________________________________________________________
GCC 3.4.3
This is the [249]list of problem reports (PRs) from GCC's bug tracking
system that are known to be fixed in the 3.4.3 release. This list
might not be complete (that is, it is possible that some PRs that have
been fixed are not listed here).
Bootstrap failures
* [250]17369 [ia64] Bootstrap failure with binutils-2.15.90.0.1.1
* [251]17850 [arm-elf] bootstrap failure - libstdc++ uses strtold
when undeclared
Internal compiler errors (ICEs) affecting multiple platforms
* [252]13948 (java) GCJ segmentation fault while compiling GL4Java
.class files
* [253]14492 ICE in loc_descriptor_from_tree, in dwarf2out.c
* [254]16301 (c++) ICE when "strong" attribute is attached to a
using directive
* [255]16566 ICE with flexible arrays
* [256]17023 ICE with nested functions in parameter declaration
* [257]17027 ICE with noreturn function in loop at -O2
* [258]17524 ICE in grokdeclarator, in cp/decl.c
* [259]17826 (c++) ICE in cp_tree_equal
C and optimization bugs
* [260]15526 -ftrapv aborts on 0 * (-1)
* [261]16999 #ident stopped working
* [262]17503 quadratic behaviour in invalid_mode_change_p
* [263]17581 Long long arithmetic fails inside a switch/case
statement when compiled with -O2
* [264]18129 -fwritable-strings doesn't work
C++ compiler and library bugs
* [265]10975 incorrect initial ostringstream::tellp()
* [266]11722 Unbuffered filebuf::sgetn is slow
* [267]14534 Unrecognizing static function as a template parameter
when its return value is also templated
* [268]15172 Copy constructor optimization in aggregate
initialization
* [269]15786 Bad error message for frequently occuring error.
* [270]16162 Rejects valid member-template-definition
* [271]16612 empty basic_strings can't live in shared memory
* [272]16715 std::basic_iostream is instantiated when used, even
though instantiations are already contained in libstdc++
* [273]16848 code in /ext/demangle.h appears broken
* [274]17132 GCC fails to eliminate function template specialization
when argument deduction fails
* [275]17259 One more _S_leaf incorrectly qualified with _RopeRep::
in ropeimpl.h
* [276]17327 use of `enumeral_type' in template type unification
* [277]17393 "unused variable '._0'" warning with -Wall
* [278]17501 Confusion with member templates
* [279]17537 g++ not passing -lstdc++ to linker when all command
line arguments are libraries
* [280]17585 usage of unqualified name of static member from within
class not allowed
* [281]17821 Poor diagnostic for using "." instead of "->"
* [282]17829 wrong error: call of overloaded function is ambiguous
* [283]17851 Misleading diagnostic for invalid function declarations
with undeclared types
* [284]17976 Destructor is called twice
* [285]18020 rejects valid definition of enum value in template
* [286]18093 bogus conflict in namespace aliasing
* [287]18140 C++ parser bug when using >> in templates
Fortran
* [288]17541 data statements with double precision constants fail
x86-specific
* [289]17853 -O2 ICE for MMX testcase
SPARC-specific
* [290]17245 ICE compiling gsl-1.5 statistics/lag1.c
Darwin-specific
* [291]17167 FATAL:Symbol L_foo$stub already defined.
AIX-specific
* [292]17277 could not catch an exception when specified -maix64
Solaris-specific
* [293]17505 <cmath> calls acosf(), ceilf(), and other functions
missing from system libraries
HP/UX specific:
* [294]17684 /usr/ccs/bin/ld: Can't create libgcc_s.sl
ARM-specific
* [295]17384 ICE with mode attribute on structures
MIPS-specific
* [296]17770 No NOP after LWL with -mips1
Other embedded target specific
* [297]11476 [arc-elf] gcc ICE on newlib's vfprintf.c
* [298]14064 [avr-elf] -fdata-sections triggers ICE
* [299]14678 [m68hc11-elf] gcc ICE
* [300]15583 [powerpc-rtems] powerpc-rtems lacks __USE_INIT_FINI__
* [301]15790 [i686-coff] Alignment error building gcc with i686-coff
target
* [302]15886 [SH] Miscompilation with -O2 -fPIC
* [303]16884 [avr-elf] [fweb related] bug while initializing
variables
Bugs relating to debugger support
* [304]13841 missing debug info for _Complex function arguments
* [305]15860 [big-endian targets] No DW_AT_location debug info is
emitted for formal arguments to a function that uses "register"
qualifiers
Testsuite issues (compiler not affected)
* [306]17465 Testsuite in libffi overrides LD_LIBRARY_PATH
* [307]17469 Testsuite in libstdc++ overrides LD_LIBRARY_PATH
* [308]18138 [mips-sgi-irix6.5] libgcc_s.so.1 not found by 64-bit
testsuite
Documentation
* [309]15498 typo in gcc manual: non-existing locale example en_UK,
should be en_GB
* [310]15747 [mips-sgi-irix5.3] /bin/sh hangs during bootstrap:
document broken shell
* [311]16406 USE_LD_AS_NEEDED undocumented
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [312]gnu@gnu.org. There
are also [313]other ways to contact the FSF.
These pages are maintained by [314]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [315]GCC manuals. If that fails, the
[316]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [317]gcc@gnu.org or
[318]gcc@gcc.gnu.org. All of our lists have [319]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2005-02-17 [320]Valid XHTML 1.0
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298. http://gcc.gnu.org/PR14064
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300. http://gcc.gnu.org/PR15583
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302. http://gcc.gnu.org/PR15886
303. http://gcc.gnu.org/PR16884
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305. http://gcc.gnu.org/PR15860
306. http://gcc.gnu.org/PR17465
307. http://gcc.gnu.org/PR17469
308. http://gcc.gnu.org/PR18138
309. http://gcc.gnu.org/PR15498
310. http://gcc.gnu.org/PR15747
311. http://gcc.gnu.org/PR16406
312. mailto:gnu@gnu.org
313. http://www.gnu.org/home.html#ContactInfo
314. http://gcc.gnu.org/about.html
315. http://gcc.gnu.org/onlinedocs/
316. mailto:gcc-help@gcc.gnu.org
317. mailto:gcc@gnu.org
318. mailto:gcc@gcc.gnu.org
319. http://gcc.gnu.org/lists.html
320. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.3/index.html
GCC 3.3 Release Series
June 28, 2004
The [1]GNU project and the GCC developers are pleased to announce the
release of GCC 3.3.4. This release was actually completed on May 31,
but various reasons delayed the actual announcement.
The GCC 3.3 release series includes numerous [2]new features,
improvements, bug fixes, and other changes, thanks to an [3]amazing
group of volunteers.
Release History
GCC 3.3.5
September 30, 2004
GCC 3.3.4
May 31, 2004
GCC 3.3.3
February 14, 2004 ([4]changes)
GCC 3.3.2
October 16, 2003 ([5]changes)
GCC 3.3.1
August 8, 2003 ([6]changes)
GCC 3.3
May 14, 2003 ([7]changes)
References and Acknowledgements
GCC used to stand for the GNU C Compiler, but since the compiler
supports several other languages aside from C, it now stands for the
GNU Compiler Collection.
A list of [8]successful builds is updated as new information becomes
available.
The GCC developers would like to thank the numerous people that have
contributed new features, improvements, bug fixes, and other changes
as well as test results to GCC. This [9]amazing group of volunteers is
what makes GCC successful.
For additional information about GCC please refer to the [10]GCC
project web site or contact the [11]GCC development mailing list.
To obtain GCC please use [12]our mirror sites, one of the [13]GNU
mirror sites, or [14]our CVS server.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [15]gnu@gnu.org. There
are also [16]other ways to contact the FSF.
These pages are maintained by [17]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [18]GCC manuals. If that fails, the
[19]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [20]gcc@gnu.org or
[21]gcc@gcc.gnu.org. All of our lists have [22]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2005-01-25 [23]Valid XHTML 1.0
References
1. http://www.gnu.org/
2. http://gcc.gnu.org/gcc-3.3/changes.html
3. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
4. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.3
5. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.2
6. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.1
7. http://gcc.gnu.org/gcc-3.3/changes.html
8. http://gcc.gnu.org/gcc-3.3/buildstat.html
9. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
10. http://gcc.gnu.org/index.html
11. mailto:gcc@gcc.gnu.org
12. http://gcc.gnu.org/mirrors.html
13. http://www.gnu.org/order/ftp.html
14. http://gcc.gnu.org/cvs.html
15. mailto:gnu@gnu.org
16. http://www.gnu.org/home.html#ContactInfo
17. http://gcc.gnu.org/about.html
18. http://gcc.gnu.org/onlinedocs/
19. mailto:gcc-help@gcc.gnu.org
20. mailto:gcc@gnu.org
21. mailto:gcc@gcc.gnu.org
22. http://gcc.gnu.org/lists.html
23. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.3/changes.html
GCC 3.3 Release Series
Changes, New Features, and Fixes
The latest release in the 3.3 release series is [1]GCC 3.3.3.
Caveats
* The preprocessor no longer accepts multi-line string literals.
They were deprecated in 3.0, 3.1, and 3.2.
* The preprocessor no longer supports the -A- switch when appearing
alone. -A- followed by an assertion is still supported.
* Support for all the systems [2]obsoleted in GCC 3.1 has been
removed from GCC 3.3. See below for a [3]list of systems which are
obsoleted in this release.
* Checking for null format arguments has been decoupled from the
rest of the format checking mechanism. Programs which use the
format attribute may regain this functionality by using the new
[4]nonnull function attribute. Note that all functions for which
GCC has a built-in format attribute, an appropriate built-in
nonnull attribute is also applied.
* The DWARF (version 1) debugging format has been deprecated and
will be removed in a future version of GCC. Version 2 of the DWARF
debugging format will continue to be supported for the foreseeable
future.
* The C and Objective-C compilers no longer accept the "Naming
Types" extension (typedef foo = bar); it was already unavailable
in C++. Code which uses it will need to be changed to use the
"typeof" extension instead: typedef typeof(bar) foo. (We have
removed this extension without a period of deprecation because it
has caused the compiler to crash since version 3.0 and no one
noticed until very recently. Thus we conclude it is not in
widespread use.)
* The -traditional C compiler option has been removed. It was
deprecated in 3.1 and 3.2. (Traditional preprocessing remains
available.) The <varargs.h> header, used for writing variadic
functions in traditional C, still exists but will produce an error
message if used.
* GCC 3.3.1 automatically places zero-initialized variables in the
.bss section on some operating systems. Versions of GNU Emacs up
to (and including) 21.3 will not work correctly when using this
optimization; you can use -fno-zero-initialized-in-bss to disable
it.
General Optimizer Improvements
* A new scheme for accurately describing processor pipelines, the
[5]DFA scheduler, has been added.
* Pavel Nejedly, Charles University Prague, has contributed new file
format used by the edge coverage profiler (-fprofile-arcs).
The new format is robust and diagnoses common mistakes where
profiles from different versions (or compilations) of the program
are combined resulting in nonsensical profiles and slow code to
produced with profile feedback. Additionally this format allows
extra data to be gathered. Currently, overall statistics are
produced helping optimizers to identify hot spots of a program
globally replacing the old intra-procedural scheme and resulting
in better code. Note that the gcov tool from older GCC versions
will not be able to parse the profiles generated by GCC 3.3 and
vice versa.
* Jan Hubicka, SuSE Labs, has contributed a new superblock formation
pass enabled using -ftracer. This pass simplifies the control flow
of functions allowing other optimizations to do better job.
He also contributed the function reordering pass
(-freorder-functions) to optimize function placement using profile
feedback.
New Languages and Language specific improvements
C/ObjC/C++
* The preprocessor now accepts directives within macro arguments. It
processes them just as if they had not been within macro
arguments.
* The separate ISO and traditional preprocessors have been
completely removed. The front end handles either type of
preprocessed output if necessary.
* In C99 mode preprocessor arithmetic is done in the precision of
the target's intmax_t, as required by that standard.
* The preprocessor can now copy comments inside macros to the output
file when the macro is expanded. This feature, enabled using the
-CC option, is intended for use by applications which place
metadata or directives inside comments, such as lint.
* The method of constructing the list of directories to be searched
for header files has been revised. If a directory named by a -I
option is a standard system include directory, the option is
ignored to ensure that the default search order for system
directories and the special treatment of system header files are
not defeated.
* A few more [6]ISO C99 features now work correctly.
* A new function attribute, nonnull, has been added which allows
pointer arguments to functions to be specified as requiring a
non-null value. The compiler currently uses this information to
issue a warning when it detects a null value passed in such an
argument slot.
* A new type attribute, may_alias, has been added. Accesses to
objects with types with this attribute are not subjected to
type-based alias analysis, but are instead assumed to be able to
alias any other type of objects, just like the char type.
C++
* Type based alias analysis has been implemented for C++ aggregate
types.
Objective-C
* Generate an error if Objective-C objects are passed by value in
function and method calls.
* When -Wselector is used, check the whole list of selectors at the
end of compilation, and emit a warning if a @selector() is not
known.
* Define __NEXT_RUNTIME__ when compiling for the NeXT runtime.
* No longer need to include objc/objc-class.h to compile self calls
in class methods (NeXT runtime only).
* New -Wundeclared-selector option.
* Removed selector bloating which was causing object files to be 10%
bigger on average (GNU runtime only).
* Using at run time @protocol() objects has been fixed in certain
situations (GNU runtime only).
* Type checking has been fixed and improved in many situations
involving protocols.
Java
* The java.sql and javax.sql packages now implement the JDBC 3.0
(JDK 1.4) API.
* The JDK 1.4 assert facility has been implemented.
* The bytecode interpreter is now direct threaded and thus faster.
Fortran
* Fortran improvements are listed in [7]the Fortran documentation.
Ada
* Ada tasking now works with glibc 2.3.x threading libraries.
New Targets and Target Specific Improvements
* The following changes have been made to the HP-PA port:
+ The port now defaults to scheduling for the PA8000 series of
processors.
+ Scheduling support for the PA7300 processor has been added.
+ The 32-bit port now supports weak symbols under HP-UX 11.
+ The handling of initializers and finalizers has been improved
under HP-UX 11. The 64-bit port no longer uses collect2.
+ Dwarf2 EH support has been added to the 32-bit linux port.
+ ABI fixes to correct the passing of small structures by
value.
* The SPARC, HP-PA, SH4, and x86/pentium ports have been converted
to use the DFA processor pipeline description.
* The following NetBSD configurations for the SuperH processor
family have been added:
+ SH3, big-endian, sh-*-netbsdelf*
+ SH3, little-endian, shle-*-netbsdelf*
+ SH5, SHmedia, big-endian, 32-bit default, sh5-*-netbsd*
+ SH5, SHmedia, little-endian, 32-bit default, sh5le-*-netbsd*
+ SH5, SHmedia, big-endian, 64-bit default, sh64-*-netbsd*
+ SH5, SHmedia, little-endian, 64-bit default, sh64le-*-netbsd*
* The following changes have been made to the IA-32/x86-64 port:
+ SSE2 and 3dNOW! intrinsics are now supported.
+ Support for thread local storage has been added to the IA-32
and x86-64 ports.
+ The x86-64 port has been significantly improved.
* The following changes have been made to the MIPS port:
+ All configurations now accept the -mabi switch. Note that you
will need appropriate multilibs for this option to work
properly.
+ ELF configurations will always pass an ABI flag to the
assembler, except when the MIPS EABI is selected.
+ -mabi=64 no longer selects MIPS IV code.
+ The -mcpu option, which was deprecated in 3.1 and 3.2, has
been removed from this release.
+ -march now changes the core ISA level. In previous releases,
it would change the use of processor-specific extensions, but
would leave the core ISA unchanged. For example, mips64-elf
-march=r8000 will now generate MIPS IV code.
+ Under most configurations, -mipsN now acts as a synonym for
-march.
+ There are some new preprocessor macros to describe the -march
and -mtune settings. See the documentation of those options
for details.
+ Support for the NEC VR-Series processors has been added. This
includes the 54xx, 5500, and 41xx series.
+ Support for the Sandcraft sr71k processor has been added.
* The following changes have been made to the S/390 port:
+ Support to build the Java runtime libraries has been added.
Java is now enabled by default on s390-*-linux* and
s390x-*-linux* targets.
+ Multilib support for the s390x-*-linux* target has been
added; this allows to build 31-bit binaries using the -m31
option.
+ Support for thread local storage has been added.
+ Inline assembler code may now use the 'Q' constraint to
specify memory operands without index register.
+ Various platform-specific performance improvements have been
implemented; in particular, the compiler now uses the BRANCH
ON COUNT family of instructions and makes more frequent use
of the TEST UNDER MASK family of instructions.
* The following changes have been made to the PowerPC port:
+ Support for IBM Power4 processor added.
+ Support for Motorola e500 SPE added.
+ Support for AIX 5.2 added.
+ Function and Data sections now supported on AIX.
+ Sibcall optimizations added.
* The support for H8 Tiny is added to the H8/300 port with -mn.
Obsolete Systems
Support for a number of older systems has been declared obsolete in
GCC 3.3. Unless there is activity to revive them, the next release of
GCC will have their sources permanently removed.
All configurations of the following processor architectures have been
declared obsolete:
* Matsushita MN10200, mn10200-*-*
* Motorola 88000, m88k-*-*
* IBM ROMP, romp-*-*
Also, some individual systems have been obsoleted:
* Alpha
+ Interix, alpha*-*-interix*
+ Linux libc1, alpha*-*-linux*libc1*
+ Linux ECOFF, alpha*-*-linux*ecoff*
* ARM
+ Generic a.out, arm*-*-aout*
+ Conix, arm*-*-conix*
+ "Old ABI," arm*-*-oabi
+ StrongARM/COFF, strongarm-*-coff*
* HPPA (PA-RISC)
+ Generic OSF, hppa1.0-*-osf*
+ Generic BSD, hppa1.0-*-bsd*
+ HP/UX versions 7, 8, and 9, hppa1.[01]-*-hpux[789]*
+ HiUX, hppa*-*-hiux*
+ Mach Lites, hppa*-*-lites*
* Intel 386 family
+ Windows NT 3.x, i?86-*-win32
* MC68000 family
+ HP systems, m68000-hp-bsd* and m68k-hp-bsd*
+ Sun systems, m68000-sun-sunos*, m68k-sun-sunos*, and
m68k-sun-mach*
+ AT&T systems, m68000-att-sysv*
+ Atari systems, m68k-atari-sysv*
+ Motorola systems, m68k-motorola-sysv*
+ NCR systems, m68k-ncr-sysv*
+ Plexus systems, m68k-plexus-sysv*
+ Commodore systems, m68k-cbm-sysv*
+ Citicorp TTI, m68k-tti-*
+ Unos, m68k-crds-unos*
+ Concurrent RTU, m68k-ccur-rtu*
+ Linux a.out, m68k-*-linux*aout*
+ Linux libc1, m68k-*-linux*libc1*
+ pSOS, m68k-*-psos*
* MIPS
+ Generic ECOFF, mips*-*-ecoff*
+ SINIX, mips-sni-sysv4
+ Orion RTEMS, mips64orion-*-rtems*
* National Semiconductor 32000
+ OpenBSD, ns32k-*-openbsd*
* POWER (aka RS/6000) and PowerPC
+ AIX versions 1, 2, and 3, rs6000-ibm-aix[123]*
+ Bull BOSX, rs6000-bull-bosx
+ Generic Mach, rs6000-*-mach*
+ Generic SysV, powerpc*-*-sysv*
+ Linux libc1, powerpc*-*-linux*libc1*
* Sun SPARC
+ Generic a.out, sparc-*-aout*, sparclet-*-aout*,
sparclite-*-aout*, and sparc86x-*-aout*
+ NetBSD a.out, sparc-*-netbsd*aout*
+ Generic BSD, sparc-*-bsd*
+ ChorusOS, sparc-*-chorusos*
+ Linux a.out, sparc-*-linux*aout*
+ Linux libc1, sparc-*-linux*libc1*
+ LynxOS, sparc-*-lynxos*
+ Solaris on HAL hardware, sparc-hal-solaris2*
+ SunOS versions 3 and 4, sparc-*-sunos[34]*
* NEC V850
+ RTEMS, v850-*-rtems*
* VAX
+ VMS, vax-*-vms*
Documentation improvements
Other significant improvements
* Almost all front-end dependencies in the compiler have been
separated out into a set of language hooks. This should make
adding a new front end clearer and easier.
* One effect of removing the separate preprocessor is a small
increase in the robustness of the compiler in general, and the
maintainability of target descriptions. Previously target-specific
built-in macros and others, such as __FAST_MATH__, had to be
handled with so-called specs that were hard to maintain. Often
they would fail to behave properly when conflicting options were
supplied on the command line, and define macros in the user's
namespace even when strict ISO compliance was requested.
Integrating the preprocessor has cleanly solved these issues.
* The Makefile suite now supports redirection of make install by
means of the variable DESTDIR.
_________________________________________________________________
GCC 3.3
Detailed release notes for the GCC 3.3 release follow.
Bug Fixes
bootstrap failures
* [8]10140 cross compiler build failures: missing __mempcpy (DUP:
[9]10198,[10]10338)
Internal compiler errors (multi-platform)
* [11]3581 large string causes segmentation fault in cc1
* [12]4382 __builtin_{set,long}jmp with -O3 can crash the compiler
* [13]5533 (c++) ICE when processing std::accumulate(begin, end,
init, invalid_op)
* [14]6387 -fpic -gdwarf-2 -g1 combination gives ICE in dwarf2out
* [15]6412 (c++) ICE in retrieve_specialization
* [16]6620 (c++) partial template specialization causes an ICE
(segmentation fault)
* [17]6663 (c++) ICE with attribute aligned
* [18]7068 ICE with incomplete types
* [19]7083 (c++) ICE using -gstabs with dodgy class derivation
* [20]7647 (c++) ICE when data member has the name of the enclosing
class
* [21]7675 ICE in fixup_var_refs_1
* [22]7718 'complex' template instantiation causes ICE
* [23]8116 (c++) ICE in member template function
* [24]8358 (ada) Ada compiler accesses freed memory, crashes
* [25]8511 (c++) ICE: (hopefully) reproducible cc1plus segmentation
fault
* [26]8564 (c++) ICE in find_function_data, in function.c
* [27]8660 (c++) template overloading ICE in tsubst_expr, in cp/pt.c
* [28]8766 (c++) ICE after failed initialization of static template
variable
* [29]8803 ICE in instantiate_virtual_regs_1, in function.c
* [30]8846 (c++) ICE after diagnostic if fr_FR@euro locale is set
* [31]8906 (c++) ICE (Segmentation fault) when parsing nested-class
definition
* [32]9216 (c++) ICE on missing template parameter
* [33]9261 (c++) ICE in arg_assoc, in cp/decl2.c
* [34]9263 (fortran) ICE caused by invalid PARAMETER in implied DO
loop
* [35]9429 (c++) ICE in template instantiation with a pointered new
operator
* [36]9516 Internal error when using a big array
* [37]9600 (c++) ICE with typedefs in template class
* [38]9629 (c++) virtual inheritance segfault
* [39]9672 (c++) ICE: Error reporting routines re-entered
* [40]9749 (c++) ICE in write_expression on invalid function
prototype
* [41]9794 (fortran) ICE: floating point exception during constant
folding
* [42]9829 (c++) Missing colon in nested namespace usage causes ICE
* [43]9916 (c++) ICE with noreturn function in ?: statement
* [44]9936 ICE with local function and variable-length 2d array
* [45]10262 (c++) cc1plus crashes with large generated code
* [46]10278 (c++) ICE in parser for invalid code
* [47]10446 (c++) ICE on definition of nonexistent member function
of nested class in a class template
* [48]10451 (c++) ICE in grokdeclarator on spurious mutable
declaration
* [49]10506 (c++) ICE in build_new at cp/init.c with
-fkeep-inline-functions and multiple inheritance
* [50]10549 (c++) ICE in store_bit_field on bitfields that exceed
the precision of the declared type
Optimization bugs
* [51]2001 Inordinately long compile times in reload CSE regs
* [52]2391 Exponential compilation time explosion in combine
* [53]2960 Duplicate loop conditions even with -Os
* [54]4046 redundant conditional branch
* [55]6405 Loop-unrolling related performance regressions
* [56]6798 very long compile time with large case-statement
* [57]6871 const objects shouldn't be moved to .bss
* [58]6909 problem w/ -Os on modified loop-2c.c test case
* [59]7189 gcc -O2 -Wall does not print ``control reaches end of
non-void function'' warning
* [60]7642 optimization problem with signbit()
* [61]8634 incorrect code for inlining of memcpy under -O2
* [62]8750 Cygwin prolog generation erroneously emitting __alloca as
regular function call
C front end
* [63]2161 long if-else cascade overflows parser stack
* [64]4319 short accepted on typedef'd char
* [65]8602 incorrect line numbers in warning messages when using
inline functions
* [66]9177 -fdump-translation-unit: C front end deletes
function_decl AST nodes and breaks debugging dumps
* [67]9853 miscompilation of non-constant structure initializer
c++ compiler and library
* [68]45 legal template specialization code is rejected (DUP:
[69]3784)
* [70]764 lookup failure: friend operator and dereferencing a
pointer and templates (DUP: [71]5116)
* [72]2862 gcc accepts invalid explicit instantiation syntax (DUP:
2863)
* [73]3663 G++ doesn't check access control during template
instantiation
* [74]3797 gcc fails to emit explicit specialization of a template
member
* [75]3948 Two destructors are called when no copy destructor is
defined (ABI change)
* [76]4137 Conversion operator within template is not accepted
* [77]4361 bogus ambiguity taking the address of a member template
* [78]4802 g++ accepts illegal template code (access to private
member; DUP: [79]5837)
* [80]4803 inline function is used but never defined, and g++ does
not object
* [81]5094 Partial specialization cannot be friend?
* [82]5730 complex<double>::norm() -- huge slowdown from
egcs-2.91.66
* [83]6713 Regression wrt 3.0.4: g++ -O2 leads to seg fault at run
time
* [84]7015 certain __asm__ constructs rejected
* [85]7086 compile time regression (quadratic behavior in
fixup_var_refs)
* [86]7099 G++ doesn't set the noreturn attribute on std::exit and
std::abort
* [87]7247 copy constructor missing when inlining enabled (invalid
optimization?)
* [88]7441 string array initialization compilation time regression
from seconds to minutes
* [89]7768 __PRETTY_FUNCTION__ for template destructor is wrong
* [90]7804 bad printing of floating point constant in warning
message
* [91]8099 Friend classes and template specializations
* [92]8117 member function pointers and multiple inheritance
* [93]8205 using declaration and multiple inheritance
* [94]8645 unnecessary non-zero checks in stl_tree.h
* [95]8724 explicit destructor call for incomplete class allowed
* [96]8805 compile time regression with many member variables
* [97]8691 -O3 and -fno-implicit-templates are incompatible
* [98]8700 unhelpful error message for binding temp to reference
* [99]8724 explicit destructor call for incomplete class allowed
* [100]8949 numeric_limits<>::denorm_min() and is_iec559 problems
* [101]9016 Failure to consistently constant fold "constant" C++
objects
* [102]9053 g++ confused about ambiguity of overloaded function
templates
* [103]9152 undefined virtual thunks
* [104]9182 basic_filebuf<> does not report errors in codecvt<>::out
* [105]9297 data corruption due to codegen bug (when copying.)
* [106]9318 i/ostream::operator>>/<<(streambuf*) broken
* [107]9320 Incorrect usage of traits_type::int_type in
stdio_filebuf
* [108]9400 bogus -Wshadow warning: shadowed declaration of this in
local classes
* [109]9424 i/ostream::operator>>/<<(streambuf*) drops characters
* [110]9425 filebuf::pbackfail broken (DUP: [111]9439)
* [112]9474 GCC freezes in compiling a weird code mixing <iostream>
and <iostream.h>
* [113]9548 Incorrect results from setf(ios::fixed) and
precision(-1) [114][DR 231]
* [115]9555 ostream inserters fail to set badbit on exception
* [116]9561 ostream inserters rethrow exception of wrong type
* [117]9563 ostream::sentry returns true after a failed preparation
* [118]9582 one-definition rule violation in std::allocator
* [119]9622 __PRETTY_FUNCTION__ incorrect in template destructors
* [120]9683 bug in initialization chains for static const variables
from template classes
* [121]9791 -Woverloaded-virtual reports hiding of destructor
* [122]9817 collate::compare doesn't handle nul characters
* [123]9825 filebuf::sputbackc breaks sbumpc
* [124]9826 operator>>(basic_istream, basic_string) fails to compile
with custom traits
* [125]9924 Multiple using statements for builtin functions not
allowed
* [126]9946 destructor is not called for temporary object
* [127]9964 filebuf::close() sometimes fails to close file
* [128]9988 filebuf::overflow writes EOF to file
* [129]10033 optimization breaks polymorphic references w/ typeid
operator
* [130]10097 filebuf::underflow drops characters
* [131]10132 filebuf destructor can throw exceptions
* [132]10180 gcc fails to warn about non-inlined function
* [133]10199 method parametrized by template does not work
everywhere
* [134]10300 use of array-new (nothrow) in segfaults on NULL return
* [135]10427 Stack corruption with variable-length automatic arrays
and virtual destructors
* [136]10503 Compilation never stops in fixed_type_or_null
Objective-C
* [137]5956 selectors aren't matched properly when added to the
selector table
Fortran compiler and library
* [138]1832 list directed i/o overflow hangs, -fbounds-check doesn't
detect
* [139]3924 g77 generates code that is rejected by GAS if COFF debug
info requested
* [140]5634 doc: explain that configure --prefix=~/... does not work
* [141]6367 multiple repeat counts confuse namelist read into array
* [142]6491 Logical operations error on logicals when using
-fugly-logint
* [143]6742 Generation of C++ Prototype for FORTRAN and extern "C"
* [144]7113 Failure of g77.f-torture/execute/f90-intrinsic-bit.f -Os
on irix6.5
* [145]7236 OPEN(...,RECL=nnn,...) without ACCESS='DIRECT' should
assume a direct access file
* [146]7278 g77 "bug"; the executable misbehaves (with -O2
-fno-automatic)
* [147]7384 DATE_AND_TIME milliseconds field inactive on Windows
* [148]7388 Incorrect output with 0-based array of characters
* [149]8587 Double complex zero ** double precision number -> NaN
instead of zero
* [150]9038 -ffixed-line-length-none -x f77-cpp-input gives:
Warning: unknown register name line-length-none
* [151]10197 Direct access files not unformatted by default
Java compiler and library
* [152]6005 gcj fails to build rhug on alpha
* [153]6389 System.getProperty("") should always throw an
IllegalArgumentException
* [154]6576 java.util.ResourceBundle.getResource ignores locale
* [155]6652 new java.io.File("").getCanonicalFile() throws exception
* [156]7060 getMethod() doesn't search super interface
* [157]7073 bytecode interpreter gives wrong answer for interface
getSuperclass()
* [158]7180 possible bug in
javax.naming.spi.NamingManager.getPlusPath()
* [159]7416 java.security startup refs "GNU libgcj.security"
* [160]7570 Runtime.exec with null envp: child doesn't inherit
parent env (DUP: [161]7578)
* [162]7611 Internal error while compiling libjava with -O
* [163]7709 NullPointerException in _Jv_ResolvePoolEntry
* [164]7766 ZipInputStream.available returns 0 immediately after
construction
* [165]7785 Calendar.getTimeInMillis/setTimeInMillis should be
public
* [166]7786 TimeZone.getDSTSavings() from JDK1.4 not implemented
* [167]8142 '$' in class names vs. dlopen 'dynamic string tokens'
* [168]8234 ZipInputStream chokes when InputStream.read() returns
small chunks
* [169]8415 reflection bug: exception info for Method
* [170]8481 java.Random.nextInt(int) may return negative
* [171]8593 Error reading GZIPped files with BufferedReader
* [172]8759 java.beans.Introspector has no flushCaches() or
flushFromCaches() methods
* [173]8997 spin() calls Thread.sleep
* [174]9253 on win32, java.io.File.listFiles("C:\\") returns pwd
instead of the root content of C:
* [175]9254 java::lang::Object::wait(), threads-win32.cc returns
wrong return codes
* [176]9271 Severe bias in java.security.SecureRandom
Ada compiler and library
* [177]6767 make gnatlib-shared fails on -laddr2line
* [178]9911 gnatmake fails to link when GCC configured with
--with-sjlj-exceptions=yes
* [179]10020 Can't bootstrap gcc on AIX with Ada enabled
* [180]10546 Ada tasking not working on Red Hat 9
preprocessor
* [181]7029 preprocessor should ignore #warning with -M
ARM-specific
* [182]2903 [arm] Optimization bug with long long arithmetic
* [183]7873 arm-linux-gcc fails when assigning address to a bit
field
FreeBSD-specific
* [184]7680 float functions undefined in math.h/cmath with #define
_XOPEN_SOURCE
HP-UX or HP-PA-specific
* [185]8705 [HP-PA] ICE in emit_move_insn_1, in expr.c
* [186]9986 [HP-UX] Incorrect transformation of fputs_unlocked to
fputc_unlocked
* [187]10056 [HP-PA] ICE at -O2 when building c++ code from doxygen
m68hc11-specific
* [188]6744 Bad assembler code generated: reference to pseudo
register z
* [189]7361 Internal compiler error in reload_cse_simplify_operands,
in reload1.c
MIPS-specific
* [190]9496 [mips-linux] bug in optimizer?
PowerPC-specific
* [191]7067 -Os with -mcpu=powerpc optimizes for speed (?) instead
of space
* [192]8480 reload ICEs for LAPACK code on powerpc64-linux
* [193]8784 [AIX] Internal compiler error in simplify_gen_subreg
* [194]10315 [powerpc] ICE: in extract_insn, in recog.c
SPARC-specific
* [195]10267 (documentation) Wrong build instructions for
*-*-solaris2*
x86-specific (Intel/AMD)
* [196]7916 ICE in instantiate_virtual_register_1
* [197]7926 (c++) i486 instructions in header files make c++
programs crash on i386
* [198]8555 ICE in gen_split_1231
* [199]8994 ICE with -O -march=pentium4
* [200]9426 ICE with -fssa -funroll-loops -fprofile-arcs
* [201]9806 ICE in inline assembly with -fPIC flag
* [202]10077 gcc -msse2 generates movd to move dwords between xmm
regs
* [203]10233 64-bit comparison only comparing bottom 32-bits
* [204]10286 type-punning doesn't work with __m64 and -O
* [205]10308 [x86] ICE with -O -fgcse or -O2
_________________________________________________________________
GCC 3.3.1
Bug Fixes
This section lists the problem reports (PRs) from GCC's bug tracking
system that are known to be fixed in the 3.3.1 release. This list
might not be complete (that is, it is possible that some PRs that have
been fixed are not listed here).
Bootstrap failures
* [206]11272 [Solaris] make bootstrap fails while building libstdc++
Internal compiler errors (multi-platform)
* [207]5754 ICE on invalid nested template class
* [208]6597 ICE in set_mem_alias_set compiling Qt with -O2 on ia64
and --enable-checking
* [209]6949 (c++) ICE in tsubst_decl, in cp/pt.c
* [210]7053 (c++) ICE when declaring a function already defined as a
friend method of a template class
* [211]8164 (c++) ICE when using different const expressions as
template parameter
* [212]8384 (c++) ICE in is_base_type, in dwarf2out.c
* [213]9559 (c++) ICE with invalid initialization of a static const
* [214]9649 (c++) ICE in finish_member_declaration, in
cp/semantics.c when redeclaring a static member variable
* [215]9864 (fortran) ICE in add_abstract_origin_attribute, in
dwarfout.c with -g -O -finline-functions
* [216]10432 (c++) ICE in poplevel, in cp/decl.c
* [217]10475 ICE in subreg_highpart_offset for code with long long
* [218]10635 (c++) ICE when dereferencing an incomplete type casted
from a void pointer
* [219]10661 (c++) ICE in instantiate_decl, in cp/pt.c while
instantiating static member variables
* [220]10700 ICE in copy_to_mode_reg on 64-bit targets
* [221]10712 (c++) ICE in constructor_name_full, in cp/decl2.c
* [222]10796 (c++) ICE when defining an enum with two values: -1 and
MAX_INT_64BIT
* [223]10890 ICE in merge_assigned_reloads building Linux 2.4.2x
sched.c
* [224]10939 (c++) ICE with template code
* [225]10956 (c++) ICE when specializing a template member function
of a template class, in tsubst, in cp/pt.c
* [226]11041 (c++) ICE: const myclass &x = *x; (when operator*()
defined)
* [227]11059 (c++) ICE with empty union
* [228]11083 (c++) ICE in commit_one_edge_insertion, in cfgrtl.c
with -O2 -fnon-call-exceptions
* [229]11105 (c++) ICE in mangle_conv_op_name_for_type
* [230]11149 (c++) ICE on error when instantiation with call
function of a base type
* [231]11228 (c++) ICE on new-expression using array operator new
and default-initialization
* [232]11282 (c++) Infinite memory usage after syntax error
* [233]11301 (fortran) ICE with -fno-globals
* [234]11308 (c++) ICE when using an enum type name as if it were a
class or namespace
* [235]11473 (c++) ICE with -gstabs when empty struct inherits from
an empty struct
* [236]11503 (c++) ICE when instantiating template with ADDR_EXPR
* [237]11513 (c++) ICE in push_template_decl_real, in cp/pt.c:
template member functions
Optimization bugs
* [238]11198 -O2 -frename-registers generates wrong code (aliasing
problem)
* [239]11304 Wrong code production with -fomit-frame-pointer
* [240]11381 volatile memory access optimized away
* [241]11536 [strength-reduce] -O2 optimization produces wrong code
* [242]11557 constant folding bug generates wrong code
C front end
* [243]5897 No warning for statement after return
* [244]11279 DWARF-2 output mishandles large enums
Preprocessor bugs
* [245]11022 no warning for non-compatible macro redefinition
C++ compiler and library
* [246]2330 static_cast<>() to a private base is allowed
* [247]5388 Incorrect message "operands to ?: have different types"
* [248]5390 Libiberty fails to demangle multi-digit template
parameters
* [249]7877 Incorrect parameter passing to specializations of member
function templates
* [250]9393 Anonymous namespaces and compiling the same file twice
* [251]10032 -pedantic converts some errors to warnings
* [252]10468 const typeof(x) is non-const, but only in templates
* [253]10527 confused error message with "new int()" parameter
initializer
* [254]10679 parameter MIN_INLINE_INSNS is not honored
* [255]10682 gcc chokes on a typedef for an enum inside a class
template
* [256]10689 pow(std::complex(0),1/3) returns (nan, nan) instead of
0.
* [257]10845 template member function (with nested template as
parameter) cannot be called anymore if another unrelated template
member function is defined
* [258]10849 Cannot define an out-of-class specialization of a
private nested template class
* [259]10888 Suppress -Winline warnings for system headers
* [260]10929 -Winline warns about functions for which no definition
is visible
* [261]10931 valid conversion static_cast<const unsigned
int&>(lvalue-of-type-int) is rejected
* [262]10940 Bad code with explicit specialization
* [263]10968 If member function implicitly instantiated, explicit
instantiation of class fails to instantiate it
* [264]10990 Cannot convert with dynamic_cast<> to a private base
class from within a member function
* [265]11039 Bad interaction between implicit typename deprecation
and friendship
* [266]11062 (libstdc++) avoid __attribute__ ((unused)); say
"__unused__" instead
* [267]11095 C++ iostream manipulator causes segfault when called
with negative argument
* [268]11098 g++ doesn't emit complete debugging information for
local variables in destructors
* [269]11137 Linux shared library constructors not called unless
there's one global object
* [270]11154 spurious ambiguity report for template class
specialization
* [271]11329 Compiler cannot find user defined implicit typecast
* [272]11332 Spurious error with casts in ?: expression
* [273]11431 static_cast behavior with subclasses when default
constructor available
* [274]11528 money_get facet does not accept "$.00" as valid
* [275]11546 Type lookup problems in out-of-line definition of a
class doubly nested from a template class
* [276]11567 C++ code containing templated member function with same
name as pure virtual member function results in linking failure
* [277]11645 Failure to deal with using and private inheritance
Java compiler and library
* [278]5179 Qualified static field access doesn't initialize its
class
* [279]8204 gcj -O2 to native reorders certain instructions
improperly
* [280]10838 java.io.ObjectInputStream syntax error
* [281]10886 The RMI registry that comes with GCJ does not work
correctly
* [282]11349 JNDI URL context factories not located correctly
x86-specific (Intel/AMD)
* [283]4823 ICE on inline assembly code
* [284]8878 miscompilation with -O and SSE
* [285]9815 (c++ library) atomicity.h - fails to compile with -O3
-masm=intel
* [286]10402 (inline assembly) [x86] ICE in merge_assigned_reloads,
in reload1.c
* [287]10504 ICE with SSE2 code and -O3 -mcpu=pentium4 -msse2
* [288]10673 ICE for x86-64 on freebsd libc vfprintf.c source
* [289]11044 [x86] out of range loop instructions for FP code on K6
* [290]11089 ICE: instantiate_virtual_regs_lossage while using SSE
built-ins
* [291]11420 [x86_64] gcc generates invalid asm code when "-O -fPIC"
is used
SPARC- or Solaris- specific
* [292]9362 solaris 'as' dies when fed .s and "-gstabs"
* [293]10142 [SPARC64] gcc produces wrong code when passing
structures by value
* [294]10663 New configure check aborts with Sun tools.
* [295]10835 combinatorial explosion in scheduler on HyperSPARC
* [296]10876 ICE in calculate_giv_inc when building KDE
* [297]10955 wrong code at -O3 for structure argument in context of
structure return
* [298]11018 -mcpu=ultrasparc busts tar-1.13.25
* [299]11556 [sparc64] ICE in gen_reg_rtx() while compiling 2.6.x
Linux kernel
ia64 specific
* [300]10907 gcc violates the ia64 ABI (GP must be preserved)
* [301]11320 scheduler bug (in machine depended reorganization pass)
* [302]11599 bug with conditional and __builtin_prefetch
PowerPC specific
* [303]9745 [powerpc] gcc mis-compiles libmcrypt (alias problem
during loop)
* [304]10871 error in rs6000_stack_info save_size computation
* [305]11440 gcc mis-compiles c++ code (libkhtml) with -O2,
-fno-gcse cures it
m68k-specific
* [306]7594 [m68k] ICE on legal code associated with simplify-rtx
* [307]10557 [m68k] ICE in subreg_offset_representable_p
* [308]11054 [m68k] ICE in reg_overlap_mentioned_p
ARM-specific
* [309]10834 [arm] GCC 3.3 still generates incorrect instructions
for functions with __attribute__ ((interrupt ("IRQ")))
* [310]10842 [arm] Clobbered link register is copied to pc under
certain circumstances
* [311]11052 [arm] noce_process_if_block() can lose REG_INC notes
* [312]11183 [arm] ICE in change_address_1 (3.3) / subreg_hard_regno
(3.4)
MIPS-specific
* [313]11084 ICE in propagate_one_insn, in flow.c
SH-specific
* [314]10331 can't compile c++ part of gcc cross compiler for sh-elf
* [315]10413 [SH] ICE in reload_cse_simplify_operands, in reload1.c
* [316]11096 i686-linux to sh-linux cross compiler fails to compile
C++ files
GNU/Linux (or Hurd?) specific
* [317]2873 Bogus fixinclude of stdio.h from glibc 2.2.3
UnixWare specific
* [318]3163 configure bug: gcc/aclocal.m4 mmap test fails on
UnixWare 7.1.1
Cygwin (or mingw) specific
* [319]5287 ICE with dllimport attribute
* [320]10148 [MingW/CygWin] Compiler dumps core
DJGPP specific
* [321]8787 GCC fails to emit .intel_syntax when invoked with
-masm=intel on DJGPP
Darwin (and MacOS X) specific
* [322]10900 trampolines crash
Documentation
* [323]1607 (c++) Format attributes on methods undocumented
* [324]4252 Invalid option `-fdump-translation-unit'
* [325]4490 Clarify restrictions on -m96bit-long-double,
-m128bit-long-double
* [326]10355 document an issue with regparm attribute on some
systems (e.g. Solaris)
* [327]10726 (fortran) Documentation for function "IDate Intrinsic
(Unix)" is wrong
* [328]10805 document bug in old version of Sun assembler
* [329]10815 warn against GNU binutils on AIX
* [330]10877 document need for newer binutils on i?86-*-linux-gnu
* [331]11280 Manual incorrect with respect to -freorder-blocks
* [332]11466 Document -mlittle-endian and its restrictions for the
sparc64 port
Testsuite bugs (compiler itself is not affected)
* [333]10737 newer bison causes g++.dg/parse/crash2.C to incorrectly
report failure
* [334]10810 gcc-3.3 fails make check: buffer overrun in
test_demangle.c
_________________________________________________________________
GCC 3.3.2
Bug Fixes
This section lists the problem reports (PRs) from [335]GCC's bug
tracking system that are known to be fixed in the 3.3.2 release. This
list might not be complete (that is, it is possible that some PRs that
have been fixed are not listed here).
Bootstrap failures and problems
* [336]8336 [SCO5] bootstrap config still tries to use COFF options
* [337]9330 [alpha-osf] Bootstrap failure on Compaq Tru64 with
--enable-threads=posix
* [338]9631 [hppa64-linux] gcc-3.3 fails to bootstrap
* [339]9877 fixincludes makes a bad sys/byteorder.h on svr5
(UnixWare 7.1.1)
* [340]11687 xstormy16-elf build fails in libf2c
* [341]12263 [SGI IRIX] bootstrap fails during compile of
libf2c/libI77/backspace.c
* [342]12490 buffer overflow in scan-decls.c (during Solaris 9
fix-header processing)
Internal compiler errors (multi-platform)
* [343]7277 Casting integers to vector types causes ICE
* [344]7939 (c++) ICE on invalid function template specialization
* [345]11063 (c++) ICE on parsing initialization list of const array
member
* [346]11207 ICE with negative index in array element designator
* [347]11522 (fortran) g77 dwarf-2 ICE in
add_abstract_origin_attribute
* [348]11595 (c++) ICE on duplicate label definition
* [349]11646 (c++) ICE in commit_one_edge_insertion with
-fnon-call-exceptions -fgcse -O
* [350]11665 ICE in struct initializer when taking address
* [351]11852 (c++) ICE with bad struct initializer.
* [352]11878 (c++) ICE in cp_expr_size
* [353]11883 ICE with any -O on mercury-generated C code
* [354]11991 (c++) ICE in cxx_incomplete_type_diagnostic, in
cp/typeck2.c when applying typeid operator to template template
parameter
* [355]12146 ICE in lookup_template_function, in cp/pt.c
* [356]12215 ICE in make_label_edge with -fnon-call-exceptions
-fno-gcse -O2
* [357]12369 (c++) ICE with templates and friends
* [358]12446 ICE in emit_move_insn on complicated array reference
* [359]12510 ICE in final_scan_insn
* [360]12544 ICE with large parameters used in nested functions
C and optimization bugs
* [361]9862 spurious warnings with -W -finline-functions
* [362]10962 lookup_field is a linear search on a linked list (can
be slow if large struct)
* [363]11370 -Wunreachable-code gives false complaints
* [364]11637 invalid assembly with -fnon-call-exceptions
* [365]11885 Problem with bitfields in packed structs
* [366]12082 Inappropriate unreachable code warnings
* [367]12180 Inline optimization fails for variadic function
* [368]12340 loop unroller + gcse produces wrong code
C++ compiler and library
* [369]3907 nested template parameter collides with member name
* [370]5293 confusing message when binding a temporary to a
reference
* [371]5296 [DR115] Pointers to functions and to template functions
behave differently in deduction
* [372]7939 ICE on function template specialization
* [373]8656 Unable to assign function with __attribute__ and pointer
return type to an appropriate variable
* [374]10147 Confusing error message for invalid template function
argument
* [375]11400 std::search_n() makes assumptions about Size parameter
* [376]11409 issues with using declarations, overloading, and
built-in functions
* [377]11740 ctype<wchar_t>::do_is(mask, wchar_t) doesn't handle
multiple bits in mask
* [378]11786 operator() call on variable in other namespace not
recognized
* [379]11867 static_cast ignores ambiguity
* [380]11928 bug with conversion operators that are typedefs
* [381]12114 Uninitialized memory accessed in dtor
* [382]12163 static_cast + explicit constructor regression
* [383]12181 Wrong code with comma operator and c++
* [384]12236 regparm and fastcall messes up parameters
* [385]12266 incorrect instantiation of unneeded template during
overload resolution
* [386]12296 istream::peek() doesn't set eofbit
* [387]12298 [sjlj exceptions] Stack unwind destroys
not-yet-constructed object
* [388]12369 ICE with templates and friends
* [389]12337 apparently infinite loop in g++
* [390]12344 stdcall attribute ignored if function returns a pointer
* [391]12451 missing(late) class forward declaration in cxxabi.h
* [392]12486 g++ accepts invalid use of a qualified name
x86 specific (Intel/AMD)
* [393]8869 [x86 MMX] ICE with const variable optimization and MMX
builtins
* [394]9786 ICE in fixup_abnormal_edges with -fnon-call-exceptions
-O2
* [395]11689 g++3.3 emits un-assembleable code for k6 architecture
* [396]12116 [k6] Invalid assembly output values with X-MAME code
* [397]12070 ICE converting between double and long double with
-msoft-float
ia64-specific
* [398]11184 [ia64 hpux] ICE on __builtin_apply building libobjc
* [399]11535 __builtin_return_address may not work on ia64
* [400]11693 [ia64] ICE in gen_nop_type
* [401]12224 [ia64] Thread-local storage doesn't work
PowerPC-specific
* [402]11087 [powerpc64-linux] GCC miscompiles raid1.c from linux
kernel
* [403]11319 loop miscompiled on ppc32
* [404]11949 ICE Compiler segfault with ffmpeg -maltivec code
SPARC-specific
* [405]11662 wrong code for expr. with cast to long long and
exclusive or
* [406]11965 invalid assembler code for a shift < 32 operation
* [407]12301 (c++) stack corruption when a returned expression
throws an exception
Alpha-specific
* [408]11717 [alpha-linux] unrecognizable insn compiling for.c of
kernel 2.4.22-pre8
HPUX-specific
* [409]11313 problem with #pragma weak and static inline functions
* [410]11712 __STDC_EXT__ not defined for C++ by default anymore?
Solaris specific
* [411]12166 Profiled programs crash if PROFDIR is set
Solaris-x86 specific
* [412]12101 i386 Solaris no longer works with GNU as?
Miscellaneous embedded target-specific bugs
* [413]10988 [m32r-elf] wrong blockmove code with -O3
* [414]11805 [h8300-unknown-coff] [H8300] ICE for simple code with
-O2
* [415]11902 [sh4] spec file improperly inserts rpath even when none
needed
* [416]11903 [sh4] -pthread fails to link due to error in spec file
on sh4
_________________________________________________________________
GCC 3.3.3
Minor features
In addition to the bug fixes documented below, this release contains
few minor features such as:
* Support for --with-sysroot
* Support for automatic detection of executable stacks
* Support for SSE3 instructions
* Support for thread local storage debugging under GDB on S390
Bug Fixes
This section lists the problem reports (PRs) from [417]GCC's bug
tracking system that are known to be fixed in the 3.3.3 release. This
list might not be complete (that is, it is possible that some PRs that
have been fixed are not listed here).
Bootstrap failures and issues
* [418]11890 Building cross gcc-3.3.1 for sparc-sun-solaris2.6 fails
* [419]12399 boehm-gc fails (when building a cross compiler):
libtool unable to infer tagged configuration
* [420]13068 mklibgcc.in doesn't handle multi-level multilib
subdirectories properly
Internal compiler errors (multi-platform)
* [421]10060 ICE (stack overflow) on huge file (300k lines) due to
recursive behaviour of copy_rtx_if_shared, in emit_rtl.c
* [422]10555 (c++) ICE on undefined template argument
* [423]10706 (c++) ICE in mangle_class_name_for_template
* [424]11496 (fortran) error in flow_loops_find when -funroll-loops
active
* [425]11741 ICE in pre_insert_copy_insn, in gcse.c
* [426]12440 GCC crashes during compilation of quicktime4linux 2.0.0
* [427]12632 (fortran) -fbounds-check ICE
* [428]12712 (c++) ICE on short legit C++ code fragment with gcc
3.3.2
* [429]12726 (c++) ICE (segfault) on trivial code
* [430]12890 (c++) ICE on compilation of class with throwing method
* [431]12900 (c++) ICE in rtl_verify_flow_info_1
* [432]13060 (fortran) ICE in fixup_var_refs_1, in function.c on
correct code with -O2 -fno-force-mem
* [433]13289 (c++) ICE in regenerate_decl_from_template on recursive
template
* [434]13318 ICE: floating point exception in the loop optimizer
* [435]13392 (c++) ICE in convert_from_eh_region_ranges_1, in
except.c
* [436]13574 (c++) invalid array default initializer in class lets
gcc consume all memory and die
* [437]13475 ICE on SIMD variables with partial value initialization
* [438]13797 (c++) ICE on invalid template parameter
* [439]13824 (java) gcj SEGV with simple .java program
C and optimization bugs
* [440]8776 loop invariants are not removed (most likely)
* [441]10339 [sparc,ppc,ppc64] Invalid optimization: replacing
strncmp by memcmp
* [442]11350 undefined labels with -Os -fPIC
* [443]12826 Optimizer removes reference through volatile pointer
* [444]12500 stabs debug info: void no longer a predefined / builtin
type
* [445]12941 builtin-bitops-1.c miscompilation (latent bug)
* [446]12953 tree inliner bug (in inline_forbidden_p) and fix
* [447]13041 linux-2.6/sound/core/oss/rate.c miscompiled
* [448]13507 spurious printf format warning
* [449]13382 Type information for const pointer disappears during
optimization.
* [450]13394 noreturn attribute ignored on recursive invokation
* [451]13400 Compiled code crashes storing to read-only location
* [452]13521 Endless loop in calculate_global_regs_live
C++ compiler and library
Some of the bug fixes in this list were made to implement decisions
that the ISO C++ standards committee has made concerning several
defect reports (DRs). Links in the list below point to detailed
discussion of the relevant defect report.
* [453]2094 unimplemented: use of `ptrmem_cst' in template type
unification
* [454]2294 using declaration confusion
* [455]5050 template instantiation depth exceeds limit: recursion
problem?
* [456]9371 Bad exception handling in
i/ostream::operator>>/<<(streambuf*)
* [457]9546 bad exception handling in ostream members
* [458]10081 basic_ios::_M_cache_locale leaves NULL members in the
face of unknown locales
* [459]10093 [460][DR 61] Setting failbit in exceptions doesn't work
* [461]10095 istream::operator>>(int&) sets ios::badbit when
ios::failbit is set.
* [462]11554 Warning about reordering of initializers doesn't
mention location of constructor
* [463]12297 istream::sentry::sentry() handles eof() incorrectly.
* [464]12352 Exception safety problems in src/localename.cc
* [465]12438 Memory leak in locale::combine()
* [466]12540 Memory leak in locale::locale(const char*)
* [467]12594 DRs [468]60 [TC] and [469]63 [TC] not implemented
* [470]12657 Resolution of [471]DR 292 (WP) still unimplemented
* [472]12696 memory eating infinite loop in diagnostics (error
recovery problem)
* [473]12815 Code compiled with optimization behaves unexpectedly
* [474]12862 Conflicts between typedefs/enums and namespace member
declarations
* [475]12926 Wrong value after assignment in initialize list using
bit-fields
* [476]12967 Resolution of [477]DR 300 [WP] still unimplemented
* [478]12971 Resolution of [479]DR 328 [WP] still unimplemented
* [480]13007 basic_streambuf::pubimbue, imbue wrong
* [481]13009 Implicitly-defined assignment operator writes to wrong
memory
* [482]13057 regparm attribute not applied to destructor
* [483]13070 -Wformat option ignored in g++
* [484]13081 forward template declarations in <complex> let inlining
fail
* [485]13239 Assertion does not seem to work correctly anymore
* [486]13262 "xxx is private within this context" when initializing
a self-contained template class
* [487]13290 simple typo in concept checking for std::generate_n
* [488]13323 Template code does not compile in presence of typedef
* [489]13369 __verify_grouping (and __add_grouping?) not correct
* [490]13371 infinite loop with packed struct and inlining
* [491]13445 Template argument replacement "dereferences" a typedef
* [492]13461 Fails to access protected-ctor from public constant
* [493]13462 Non-standard-conforming type set::pointer
* [494]13478 gcc uses wrong constructor to initialize a const
reference
* [495]13544 "conflicting types" for enums in different scopes
* [496]13650 string::compare should not (always) use
traits_type::length()
* [497]13683 bogus warning about passing non-PODs through ellipsis
* [498]13688 Derived class is denied access to protected base class
member class
* [499]13774 Member variable cleared in virtual multiple inheritance
class
* [500]13884 Protect sstream.tcc from extern template use
Java compiler and library
* [501]10746 [win32] garbage collection crash in GCJ
Objective-C compiler and library
* [502]11433 Crash due to dereferencing null pointer when querying
protocol
Fortran compiler and library
* [503]12633 logical expression gives incorrect result with
-fugly-logint option
* [504]13037 [gcse-lm] g77 generates incorrect code
* [505]13213 Hex constant problem when compiling with -fugly-logint
and -ftypeless-boz
x86-specific (Intel/AMD)
* [506]4490 ICE with -m128bit-long-double
* [507]12292 [x86_64] ICE: RTL check: expected code `const_int',
have `reg' in make_field_assignment, in combine.c
* [508]12441 ICE: can't find a register to spill
* [509]12943 array static-init failure under -fpic, -fPIC
* [510]13608 Incorrect code with -O3 -ffast-math
PowerPC-specific
* [511]11598 testcase gcc.dg/20020118-1.c fails runtime check of
__attribute__((aligned(16)))
* [512]11793 ICE in extract_insn, in recog.c (const_vector's)
* [513]12467 vmsumubm emitted when vmsummbm appropriate (typo in
altivec.md)
* [514]12537 g++ generates writeable text sections
SPARC-specific
* [515]12496 wrong result for __atomic_add(&value, -1) when using
-O0 -m64
* [516]12865 mprotect call to make trampoline executable may fail
* [517]13354 ICE in sparc_emit_set_const32
ARM-specific
* [518]10467 [arm] ICE in pre_insert_copy_insn,
ia64-specific
* [519]11226 ICE passing struct arg with two floats
* [520]11227 ICE for _Complex float, _Complex long double args
* [521]12644 GCC 3.3.2 fails to compile glibc on ia64
* [522]13149 build gcc-3.3.2 1305 error:unrecognizable insn
* Various fixes for libunwind
Alpha-specific
* [523]12654 Incorrect comparison code generated for Alpha
* [524]12965 SEGV+ICE in cc1plus on alpha-linux with -O2
* [525]13031 ICE (unrecognizable insn) when building
gnome-libs-1.4.2
HPPA-specific
* [526]11634 [hppa] ICE in verify_local_live_at_start, in flow.c
* [527]12158 [hppa] compilation does not terminate at -O1
S390-specific
* [528]11992 Wrong built-in code for memcmp with length 1<<24: only
(1<<24)-1 possible for CLCL-Instruction
SH-specific
* [529]9365 segfault in gen_far_branch (config/sh/sh.c)
* [530]10392 optimizer generates faulty array indexing
* [531]11322 SH profiler outputs multiple definitions of symbol
* [532]13069 gcc/config/sh/rtems.h broken
* [533]13302 Putting a va_list in a struct causes seg fault
* [534]13585 Incorrect optimization of call to sfunc
* Fix inappropriately exported libgcc functions from the shared
library
Other embedded target specific
* [535]8916 [mcore] unsigned char assign gets hosed.
* [536]11576 [h8300] ICE in change_address_1, in emit-rtl.c
* [537]13122 [h8300] local variable gets corrupted by function call
when -fomit-frame-pointer is given
* [538]13256 [cris] strict_low_part mistreated in delay slots
* [539]13373 [mcore] optimization with -frerun-cse-after-loop
-fexpensive-optimizations produces wrong code on mcore
GNU HURD-specific
* [540]12561 gcc/config/t-gnu needs updating to work with
--with-sysroot
Tru64 Unix specific
* [541]6243 testsuite fails almost all tests due to no libintl in
LD_LIBRARY_PATH during test.
* [542]11397 weak aliases broken on Tru64 UNIX
AIX-specific
* [543]12505 build failure due to defines of uchar in cpphash.h and
sys/types.h
* [544]13150 WEAK symbols not exported by collect2
IRIX-specific
* [545]12666 fixincludes problem on IRIX 6.5.19m
Solaris-specific
* [546]12969 Including sys/byteorder.h breaks configure checks
Testsuite problems (compiler is not affected)
* [547]10819 testsuite creates CR+LF on compiler version lines in
test summary files
* [548]11612 abi_check not finding correct libgcc_s.so.1
Miscellaneous
* [549]13211 using -###, incorrect warnings about unused linker file
are produced
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [550]gnu@gnu.org. There
are also [551]other ways to contact the FSF.
These pages are maintained by [552]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [553]GCC manuals. If that fails, the
[554]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [555]gcc@gnu.org or
[556]gcc@gcc.gnu.org. All of our lists have [557]public archives.
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Last modified 2004-11-14 [558]Valid XHTML 1.0
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506. http://gcc.gnu.org/PR4490
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508. http://gcc.gnu.org/PR12441
509. http://gcc.gnu.org/PR12943
510. http://gcc.gnu.org/PR13608
511. http://gcc.gnu.org/PR11598
512. http://gcc.gnu.org/PR11793
513. http://gcc.gnu.org/PR12467
514. http://gcc.gnu.org/PR12537
515. http://gcc.gnu.org/PR12496
516. http://gcc.gnu.org/PR12865
517. http://gcc.gnu.org/PR13354
518. http://gcc.gnu.org/PR10467
519. http://gcc.gnu.org/PR11226
520. http://gcc.gnu.org/PR11227
521. http://gcc.gnu.org/PR12644
522. http://gcc.gnu.org/PR13149
523. http://gcc.gnu.org/PR12654
524. http://gcc.gnu.org/PR12965
525. http://gcc.gnu.org/PR13031
526. http://gcc.gnu.org/PR11634
527. http://gcc.gnu.org/PR12158
528. http://gcc.gnu.org/PR11992
529. http://gcc.gnu.org/PR9365
530. http://gcc.gnu.org/PR10392
531. http://gcc.gnu.org/PR11322
532. http://gcc.gnu.org/PR13069
533. http://gcc.gnu.org/PR13302
534. http://gcc.gnu.org/PR13585
535. http://gcc.gnu.org/PR8916
536. http://gcc.gnu.org/PR11576
537. http://gcc.gnu.org/PR13122
538. http://gcc.gnu.org/PR13256
539. http://gcc.gnu.org/PR13373
540. http://gcc.gnu.org/PR12561
541. http://gcc.gnu.org/PR6243
542. http://gcc.gnu.org/PR11397
543. http://gcc.gnu.org/PR12505
544. http://gcc.gnu.org/PR13150
545. http://gcc.gnu.org/PR12666
546. http://gcc.gnu.org/PR12969
547. http://gcc.gnu.org/PR10819
548. http://gcc.gnu.org/PR11612
549. http://gcc.gnu.org/PR13211
550. mailto:gnu@gnu.org
551. http://www.gnu.org/home.html#ContactInfo
552. http://gcc.gnu.org/about.html
553. http://gcc.gnu.org/onlinedocs/
554. mailto:gcc-help@gcc.gnu.org
555. mailto:gcc@gnu.org
556. mailto:gcc@gcc.gnu.org
557. http://gcc.gnu.org/lists.html
558. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.2/index.html
GCC 3.2 Release Series
April 25, 2003
The [1]GNU project and the GCC developers are pleased to announce the
release of GCC 3.2.3.
The purpose of the GCC 3.2 release series is to provide a stable
platform for OS distributors to use building their next releases. A
primary objective was to stabilize the C++ ABI; we believe that the
interface to the compiler and the C++ standard library are now
relatively stable.
Be aware that C++ code compiled by GCC 3.2.x will (in general) not
interoperate with code compiled by GCC 3.1.1 or earlier.
Please refer to our [2]detailed list of news, caveats, and bug-fixes
for further information.
Release History
GCC 3.2.3
April 25, 2003 ([3]changes)
GCC 3.2.2
February 5, 2003 ([4]changes)
GCC 3.2.1
November 19, 2002 ([5]changes)
GCC 3.2
August 14, 2002 ([6]changes)
References and Acknowledgements
GCC used to stand for the GNU C Compiler, but since the compiler
supports several other languages aside from C, it now stands for the
GNU Compiler Collection.
A list of [7]successful builds is updated as new information becomes
available.
The GCC developers would like to thank the numerous people that have
contributed new features, improvements, bug fixes, and other changes
as well as test results to GCC. This [8]amazing group of volunteers is
what makes GCC successful.
For additional information about GCC please refer to the [9]GCC
project web site or contact the [10]GCC development mailing list.
To obtain GCC please use [11]our mirror sites, one of the [12]GNU
mirror sites, or [13]our CVS server.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [14]gnu@gnu.org. There
are also [15]other ways to contact the FSF.
These pages are maintained by [16]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [17]GCC manuals. If that fails, the
[18]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [19]gcc@gnu.org or
[20]gcc@gcc.gnu.org. All of our lists have [21]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [22]Valid XHTML 1.0
References
1. http://www.gnu.org/
2. http://gcc.gnu.org/gcc-3.2/changes.html
3. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.3
4. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.2
5. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.1
6. http://gcc.gnu.org/gcc-3.2/changes.html#3.2
7. http://gcc.gnu.org/gcc-3.2/buildstat.html
8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
9. http://gcc.gnu.org/index.html
10. mailto:gcc@gcc.gnu.org
11. http://gcc.gnu.org/mirrors.html
12. http://www.gnu.org/order/ftp.html
13. http://gcc.gnu.org/cvs.html
14. mailto:gnu@gnu.org
15. http://www.gnu.org/home.html#ContactInfo
16. http://gcc.gnu.org/about.html
17. http://gcc.gnu.org/onlinedocs/
18. mailto:gcc-help@gcc.gnu.org
19. mailto:gcc@gnu.org
20. mailto:gcc@gcc.gnu.org
21. http://gcc.gnu.org/lists.html
22. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.2/changes.html
GCC 3.2 Release Series
Changes, New Features, and Fixes
The latest release in the 3.2 release series is [1]GCC 3.2.3.
Caveats and New Features
Caveats
* The C++ compiler does not correctly zero-initialize
pointers-to-data members. You must explicitly initialize them. For
example: int S::*m(0); will work, but depending on
default-initialization to zero will not work. This bug cannot be
fixed in GCC 3.2 without inducing unacceptable risks. It will be
fixed in GCC 3.3.
* This GCC release is based on the GCC 3.1 sourcebase, and thus has
all the [2]changes in the GCC 3.1 series. In addition, GCC 3.2 has
a number of C++ ABI fixes which make its C++ compiler generate
binary code which is incompatible with the C++ compilers found in
earlier GCC releases, including GCC 3.1 and GCC 3.1.1.
Frontend Enhancements
C/C++/Objective-C
* The method of constructing the list of directories to be searched
for header files has been revised. If a directory named by a -I
option is a standard system include directory, the option is
ignored to ensure that the default search order for system
directories and the special treatment of system header files are
not defeated.
* The C and Objective-C compilers no longer accept the "Naming
Types" extension (typedef foo = bar); it was already unavailable
in C++. Code which uses it will need to be changed to use the
"typeof" extension instead: typedef typeof(bar) foo. (We have
removed this extension without a period of deprecation because it
has caused the compiler to crash since version 3.0 and no one
noticed until very recently. Thus we conclude it is not in
widespread use.)
C++
* GCC 3.2 fixed serveral differences between the C++ ABI implemented
in GCC and the multi-vendor standard, but more have been found
since the release. 3.2.1 adds a new warning, -Wabi, to warn about
code which is affected by these bugs. We will fix these bugs in
some future release, once we are confident that all have been
found; until then, it is our intention to make changes to the ABI
only if they are necessary for correct compilation of C++, as
opposed to conformance to the ABI documents.
* For details on how to build an ABI compliant compiler for
GNU/Linux systems, check the [3]common C++ ABI page.
New Targets and Target Specific Improvements
IA-32
* Fixed a number of bugs in SSE and MMX intrinsics.
* Fixed common compiler crashes with SSE instruction set enabled
(implied by -march=pentium3, pentium4, athlon-xp)
* __m128 and __m128i is not 128bit aligned when used in structures.
x86-64
* A bug whereby the compiler could generate bad code for bzero has
been fixed.
* ABI fixes (implying ABI incompatibilities with previous version in
some corner cases)
* Fixed prefetch code generation
_________________________________________________________________
GCC 3.2.3
3.2.3 is a bug fix release only; there are no new features that were
not present in GCC 3.2.2.
Bug Fixes
This section lists the problem reports (PRs) from GCC's bug tracking
system that are known to be fixed in the 3.2.3 release. This list
might not be complete (that is, it is possible that some PRs that have
been fixed are not listed here), and some of the titles have been
changed to make them more clear.
Internal Compiler Errors (multi-platform)
* [4]3782: (c++) -quiet -fstats produces a segmentation fault in
cc1plus
* [5]6440: (c++) template specializations cause ICE
* [6]7050: (c++) ICE on: (i ? get_string() : throw)
* [7]7741: ICE on conflicting types (make_decl_rtl in varasm.c)
* [8]7982: (c++) ICE due to infinite recursion (using STL set)
* [9]8068: exceedingly high (infinite) memory usage
* [10]8178: ICE with __builtin_ffs
* [11]8396: ICE in copy_to_mode_reg, in explow.c
* [12]8674: (c++) ICE in cp_expr_size, in cp/cp-lang.c
* [13]9768: ICE when optimizing inline code at -O2
* [14]9798: (c++) Infinite recursion (segfault) in
cp/decl.c:push_using_directive with recursive using directives
* [15]9799: mismatching structure initializer with nested flexible
array member: ICE
* [16]9928: ICE on duplicate enum declaration
* [17]10114: ICE in mem_loc_descriptor, in dwarf2out.c (affects
sparc, alpha)
* [18]10352: ICE in find_reloads_toplev
* [19]10336: ICE with -Wunreachable-code
C/optimizer bugs:
* [20]8224: Incorrect joining of signed and unsigned division
* [21]8613: -O2 produces wrong code with builtin strlen and
postincrements
* [22]8828: gcc reports some code is unreachable when it is not
* [23]9226: GCSE breaking argument passing
* [24]9853: miscompilation of non-constant structure initializer
* [25]9797: C99-style struct initializers are miscompiled
* [26]9967: Some standard C function calls should not be replaced
when optimizing for size
* [27]10116: ce2: invalid merge of join_bb in the context of switch
statements
* [28]10171: wrong code for inlined function
* [29]10175: -Wunreachable-code doesn't work for single lines
C++ compiler and library:
* [30]8316: Confusing diagnostic for code that misuses conversion
operators
* [31]9169: filebuf output fails if codecvt<>::out returns noconv
* [32]9420: incomplete type incorrectly reported
* [33]9459: typeof in return type specification of template not
supported
* [34]9507: filebuf::open handles ios_base::ate incorrectly
* [35]9538: Out-of-bounds memory access in streambuf::sputbackc
* [36]9602: Total confusion about template/friend/virtual/abstract
* [37]9993: destructor not called for local object created within
and returned from infinite loop
* [38]10167: ieee_1003.1-2001 locale specialisations on a
glibc-2.3.2 system
Java compiler and library:
* [39]9652: libgcj build fails on irix6.5.1[78]
* [40]10144: gas on solaris complains about bad .stabs lines for
java, native as unaffected
x86-specific (Intel/AMD):
* [41]8746: gcc miscompiles Linux kernel ppa driver on x86
* [42]9888: -mcpu=k6 -Os produces out of range loop instructions
* [43]9638: Cross-build for target i386-elf and i586-pc-linux-gnu
failed
* [44]9954: Cross-build for target i586-pc-linux-gnu (--with-newlib)
failed
SPARC-specific:
* [45]7784: [Sparc] ICE in extract_insn, in recog.c
* [46]7796: sparc extra failure with -m64 on execute/930921-1.c in
unroll.c
* [47]8281: ICE when compiling with -O2 -fPIC for Ultrasparc
* [48]8366: [Sparc] C testsuite failure with -m64 -fpic -O in
execute/loop-2d.c
* [49]8726: gcc -O2 miscompiles Samba 2.2.7 on 32-bit sparc
* [50]9414: Scheduling bug on Ultrasparc
* [51]10067: GCC-3.2.2 outputs invalid asm on sparc64
m68k-specific:
* [52]7248: broken "inclusive or" code
* [53]8343: m68k-elf/rtems ICE at instantiate_virtual_regs_1
PowerPC-specific:
* [54]9732: Wrong code with -O2 -fPIC
* [55]10073: ICE: powerpc cannot split insn
Alpha-specific:
* [56]7702: optimization problem on a DEC alpha under OSF1
* [57]9671: gcc.3.2.2 does not build on a HP Tru64 Unix v5.1B system
HP-specific:
* [58]8694: <string> breaks <ctype.h> on HP-UX 10.20 (DUP: 9275)
* [59]9953: (ada) gcc 3.2.x can't build 3.3-branch ada on HP-UX 10
(missing symbol)
* [60]10271: Floating point args don't get reloaded across function
calls with -O2
MIPS specific:
* [61]6362: mips-irix6 gcc-3.1 C testsuite failure with -mips4 in
compile/920501-4.c
CRIS specific:
* [62]10377: gcc-3.2.2 creates bad assembler code for cris
Miscellaneous and minor bugs:
* [63]6955: collect2 says "core dumped" when there is no core
_________________________________________________________________
GCC 3.2.2
Beginning with 3.2.2, GCC's Makefile suite supports redirection of
make install by means of the DESTDIR variable. Parts of the GCC tree
have featured that support long before, but now it is available even
from the top level.
Other than that, GCC 3.2.2 is a bug fix release only; there are no new
features that were not present in GCC 3.2.1.
Bug Fixes
On the following i386-based systems GCC 3.2.1 broke the C ABI wrt.
functions returning structures: Cygwin, FreeBSD (GCC 3.2.1 as shipped
with FreeBSD 5.0 does not have this problem), Interix, a.out-based
Linux and NetBSD, OpenBSD, and Darwin. GCC 3.2.2 reverts this ABI
change, and thus restores ABI-compatibility with previous releases
(except GCC 3.2.1) on these platforms.
This section lists the problem reports (PRs) from GCC's bug tracking
system that are known to be fixed in the 3.2.2 release. This list
might not be complete (that is, it is possible that some PRs that have
been fixed are not listed here) and some of the titles have been
changed to make them more clear.
Internal Compiler Errors (multi-platform)
* [64]5919: (c++) ICE when passing variable array to template
function
* [65]7129: (c++) ICE with min/max assignment operators (<?= and
>?=)
* [66]7507: ICE with -O2 when address of called function is a
complicated expression
* [67]7622: ICE with nested inline functions if function's address
is taken
* [68]7681: (fortran) ICE in compensate_edge, in reg-stack.c (also
PR [69]9258)
* [70]8031: (c++) ICE in code comparing typeids and casting from
virtual base
* [71]8275: ICE in simplify_subreg
* [72]8332: (c++) builtin strlen/template interaction causes ICE
* [73]8372: (c++) ICE on explicit call of destructor
* [74]8439: (c, not c++) empty struct causes ICE
* [75]8442: (c++) ICE with nested template classes
* [76]8518: ICE when compiling mplayer ("extern inline" issue)
* [77]8615: (c++) ICE with out-of-range character constant template
argument
* [78]8663: (c++) ICE in cp_expr_size, at cp-lang.c:307
* [79]8799: (c++) ICE: error reporting routines re-entered
* [80]9328: (c++) ICE with typeof(X) for overloaded X
* [81]9465: (preprocessor) cpp -traditional ICE on null bytes
C++ (compiler and library) bugs
* [82]47: scoping in nested classes is broken
* [83]6745: problems with iostream rdbuf() member function
* [84]8214: conversion from const char* const to char* sometimes
accepted illegally
* [85]8493: builtin strlen and overload resolution (same bug as
[86]8332)
* [87]8503: strange behaviour of function types
* [88]8727: compiler confused by inheritance from an anonymous
struct
* [89]7445: poor performance of std::locale::classic() in
multi-threaded applications
* [90]8230: mishandling of overflow in vector<T>::resize
* [91]8399: sync_with_stdio(false) breaks unformatted input
* [92]8662: illegal access of private member of unnamed class is
accepted
* [93]8707: "make distclean" fails in libstdc++-v3 directory
* [94]8708: __USE_MALLOC doesn't work
* [95]8790: Use of non-thread-safe strtok in src/localename.cc
* [96]8887: Bug in date formats with --enable-clocale=generic
* [97]9076: Call Frame Instructions are not handled correctly during
unwind operation
* [98]9151: std::setprecision limited to 16 digits when outputting a
double to a stream
* [99]9168: codecvt<char, char, mbstate_t> overwrites output buffers
* [100]9269: libstdc++ headers: explicit specialization of function
must precede its first use
* [101]9322: return value of basic_streambuf<>::getloc affected by
locale::global
* [102]9433: segfault in runtime support for dynamic_cast
C and optimizer bugs
* [103]8032: GCC incorrectly initializes static structs that have
flexible arrays
* [104]8639: simple arithmetic expression broken
* [105]8794: optimization improperly eliminates certain expressions
* [106]8832: traditional "asm volatile" code is illegally optimized
* [107]8988: loop optimizer bug: with -O2, code is generated that
segfaults (found on i386, bug present for all platforms)
* [108]9492: structure copy clobbers subsequent stores to structure
Objective-C bugs
* [109]9267: Objective-C parser won't build with newer bison
versions (e.g. 1.875)
Ada bugs
* [110]8344: Ada build problem due to conflict between gcc/final.o,
gcc/ada/final.o
Preprocessor bugs
* [111]8524: _Pragma within macros is improperly expanded
* [112]8880: __WCHAR_TYPE__ macro incorrectly set to "long int" with
-fshort-wchar
ARM-specific
* [113]9090: arm ICE with >= -O2; regression from gcc-2.95
x86-specific (Intel/AMD)
* [114]8588: ICE in extract_insn, at recog.c:NNNN (shift
instruction)
* [115]8599: loop unroll bug with -march=k6-3
* [116]9506: ABI breakage in structure return (affects BSD and
Cygwin, but not GNU/Linux)
FreeBSD 5.0 specific
* [117]9484: GCC 3.2.1 Bootstrap failure on FreeBSD 5.0
RTEMS-specific
* [118]9292: hppa1.1-rtems configurery problems
* [119]9293: [m68k-elf/rtems] config/m68k/t-crtstuff bug
* [120]9295: [mips-rtems] config/mips/rtems.h init/fini issue
* [121]9296: gthr-rtems regression
* [122]9316: powerpc-rtems: extending multilibs
HP-PA specific
* [123]9493: ICE with -O2 when building a simple function
Documentation
* [124]7341: hyperlink to gcov in GCC documentation doesn't work
* [125]8947: Please add a warning about "-malign-double" in docs
* [126]7448, [127]8882: typo cleanups
_________________________________________________________________
GCC 3.2.1
3.2.1 adds a new warning, -Wabi. This option warns when GNU C++
generates code that is known not to be binary-compatible with the
vendor-neutral ia32/ia64 ABI. Please consult the GCC manual, included
in the distribution, for details.
This release also removes an old GCC extension, "naming types", and
the documentation now directs users to use a different GCC extension,
__typeof__, instead. The feature had evidently been broken for a
while.
Otherwise, 3.2.1 is a bug fix release only; other than bug fixes and
the new warning there are no new features that were not present in GCC
3.2.
In addition, the previous fix for [128]PR 7445 (poor performance of
std::locale::classic() in multi-threaded applications) was reverted
("unfixed"), because the "fix" was not thread-safe.
Bug Fixes
This section lists the problem reports (PRs) from GCC's bug tracking
system that are known to be fixed in the 3.2.1 release. This list
might not be complete (that is, it is possible that some PRs that have
been fixed are not listed here). As you can see, the number of bug
fixes is quite large, so it is strongly recommended that users of
earlier GCC 3.x releases upgrade to GCC 3.2.1.
Internal Compiler Errors (multi-platform)
* [129]2521: (c++) ICE in build_ptrmemfunc, in cp/typeck.c
* [130]5661: (c++) ICE instantiating template on array of unknown
size (bad code)
* [131]6419: (c++) ICE in make_decl_rtl for "longest" attribute on
64-bit platforms
* [132]6994: (c++) ICE in find_function_data
* [133]7150: preprocessor: GCC -dM -E gives an ICE
* [134]7160: ICE when optimizing branches without a return value
* [135]7228: (c++) ICE when using member template and template
function
* [136]7266: (c++) ICE with -pedantic on missing typename
* [137]7353: ICE from use of "Naming Types" extension, see above
* [138]7411: ICE in instantiate_virtual_regs_1, in function.c
* [139]7478: (c++) ICE on static_cast inside template
* [140]7526: preprocessor core dump when _Pragma implies #pragma
dependency
* [141]7721: (c++) ICE on simple (but incorrect) template ([142]7803
is a duplicate)
* [143]7754: (c++) ICE on union with template parameter
* [144]7788: (c++) redeclaring a definition as an incomplete class
causes ICE
* [145]8031: (c++) ICE in comptypes, in cp/typeck.c
* [146]8055: preprocessor dies with SIG11 when building FreeBSD
kernel
* [147]8067: (c++) ICE due to mishandling of __FUNCTION__ and
related variables
* [148]8134: (c++) ICE in force_store_init_value on legal code
* [149]8149: (c++) ICE on incomplete type
* [150]8160: (c++) ICE in build_modify_expr, in cp/typeck.c: array
initialization
C++ (compiler and library) bugs
* [151]5607: No pointer adjustment in covariant return types
* [152]6579: Infinite loop with statement expressions in member
initialization
* [153]6803: Default copy constructor bug in GCC 3.1
* [154]7176: g++ confused by friend and static member with same name
* [155]7188: Segfault with template class and recursive (incorrect)
initializer list
* [156]7306: Regression: GCC 3.x fails to compile code with virtual
inheritance if a method has a variable number of arguments
* [157]7461: ctype<char>::classic_table() returns offset array on
Cygwin
* [158]7524: f(const float arg[3]) fails
* [159]7584: Erroneous ambiguous base error on using declaration
* [160]7676: Member template overloading problem
* [161]7679: infinite loop when a right parenthesis is missing
* [162]7811: default locale not taken from environment
* [163]7961: compare( char *) implemented incorrectly in
basic_string<>
* [164]8071: basic_ostream::operator<<(streambuf*) loops forever if
streambuf::underflow() leaves gptr() NULL (dups: [165]8127,
[166]6745)
* [167]8096: deque::at() throws std::range_error instead of
std::out_of_range
* [168]8127: cout << cin.rdbuf() infinite loop
* [169]8218: Excessively large memory consumed for classes with
large array members
* [170]8287: GCC 3.2: Destructor called for non-constructed local
object
* [171]8347: empty vector range used in string construction causes
core dump
* [172]8348: fail() flag is set in istringstream when eof() flag is
set
* [173]8391: regression: infinite loop in cp/decl2.c(finish_file)
C and optimizer bugs
* [174]6627: -fno-align-functions doesn't seem to disable function
alignment
* [175]6631: life_analysis misoptimizes code to initialize fields of
a structure
* [176]7102: unsigned char division results in floating exception
* [177]7120: Run once loop should *always* be unrolled
(pessimization)
* [178]7209: Bug involving array referencing and ?: operator
* [179]7515: invalid inlining of global function with -O3
* [180]7814: incorrect scheduling for glibc-2.2.92 strcpy test
* [181]8467: bug in sibling call optimization
Preprocessor bugs
* [182]4890: incorrect line markers from the traditional
preprocessor
* [183]7357: -M option omits system headers files (making it the
same as -MM)
* [184]7358: Changes to Sun's make Dependencies
* [185]7602: C++ header files found in CPLUS_INCLUDE_PATH treated as
C headers
* [186]7862: Interrupting GCC -MD removes .d file but not .o
* [187]8190: Failed compilation deletes -MD dependency file
* [188]8524: _Pragma within macro is improperly expanded
x86 specific (Intel/AMD)
* [189]5351: (i686-only) function pass-by-value structure copy
corrupts stack ([190]7591 is a duplicate)
* [191]6845, [192]7034, [193]7124, [194]7174: ICE's with
-march=pentium3/pentium2/athlon (these are all the same underlying
bug, in MMX register use)
* [195]7134, [196]7375, [197]7390: ICE with -march=athlon (maybe
same as above?)
* [198]6890: xmmintrin.h, _MM_TRANSPOSE4_PS is broken
* [199]6981: wrong code in 64-bit manipulation on x86
* [200]7242: GCC -mcpu=pentium[23] doesn't define
__tune_pentiumpro__ macro
* [201]7396: ix86: cmpgt_ss, cmpge_ss, cmpngt_ss, and cmpnge_ss SSE
intrinsics are broken
* [202]7630: GCC 3.2 breaks on Mozilla 1.0's JS sources with
-march=pentium4
* [203]7693: Typo in i386 mmintrin.h header
* [204]7723: ICE - Pentium3 sse - GCC 3.2
* [205]7951: ICE on -march=pentium4 -O2 -mfpmath=sse
* [206]8146: (i686 only) gcc 3.2 miscompiles gcc 2.95.3
PowerPC specific
* [207]5967: GCC bug when profiling nested functions on powerpc
* [208]6984: wrong code generated with -O2, -O3, -Os for do-while
loop on PowerPC
* [209]7114: PowerPC: ICE building strcoll.op from glibc-2.2.5
* [210]7130: miscompiled code for GCC-3.1 in powerpc linux with
-funroll-all-loops
* [211]7133: PowerPC ICE: unrecognizable insn
* [212]7380: ICE in extract_insn, at recog.c:2148
* [213]8252: ICE on Altivec code with optimization turned on
* [214]8451: Altivec ICE in GCC 3.2
HP/PA specific
* [215]7250: __ashrdi3 returns wrong value on 32 bit hppa
SPARC specific
* [216]6668: when using --disable-multilib, libgcc_s.so is installed
in the wrong place on sparc-solaris
* [217]7151: ICE when compiling for UltraSPARC
* [218]7335: SPARC: ICE in verify_wide_reg (flow.c:557) with long
double and -O1
* [219]7842: [REGRESSION] SPARC code gen bug
ARM specific
* [220]7856: [arm] invalid offset in constant pool reference
* [221]7967: optimization produces wrong code (ARM)
Alpha specific
* [222]7374: __builtin_fabsl broken on alpha
IBM s390 specific
* [223]7370: ICE in fixup_var_refs_1 on s390x
* [224]7409: loop optimization bug on s390x-linux-gnu
* [225]8232: s390x: ICE when using bcmp with int length argument
SCO specific
* [226]7623: SCO OpenServer build fails with machmode.def: undefined
symbol: BITS_PER_UNIT
m68k/Coldfire specific
* [227]8314: crtbegin, crtend need to be multilib'ed for this
platform
Documentation
* [228]761: Document some undocumented options
* [229]5610: Fix documentation about invoking SSE instructions
(-mfpmath=sse)
* [230]7484: List -Wmissing-declarations as C-only option
* [231]7531: -mcmodel not documented for x86-64
* [232]8120: Update documentation of bad use of ##
_________________________________________________________________
GCC 3.2
3.2 is a small bug fix release, but there is a change to the
application binary interface (ABI), hence the change to the second
part of the version number.
The main purpose of the 3.2 release is to correct a couple of problems
in the C++ ABI, with the intention of providing a stable interface
going forward. Accordingly, 3.2 is only a small change to 3.1.1.
Bug Fixes
C++
* [233]7320: g++ 3.2 relocation problem
* [234]7470: vtable: virtual function pointers not in declaration
order
libstdc++
* [235]6410: Trouble with non-ASCII monetary symbols and wchar_t
* [236]6503, [237]6642, [238]7186: Problems with comparing or
subtracting various types of const and non-const iterators
* [239]7216: ambiguity with basic_iostream::traits_type
* [240]7220: problem with basic_istream::ignore(0,delimiter)
* [241]7222: locale::operator==() doesn't work on std::locale("")
* [242]7286: placement operator delete issue
* [243]7442: cxxabi.h does not match the C++ ABI
* [244]7445: poor performance of std::locale::classic() in
multi-threaded applications
x86-64 specific
* [245]7291: off-by-one in generated inline bzero code for x86-64
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [246]gnu@gnu.org. There
are also [247]other ways to contact the FSF.
These pages are maintained by [248]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [249]GCC manuals. If that fails, the
[250]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [251]gcc@gnu.org or
[252]gcc@gcc.gnu.org. All of our lists have [253]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [254]Valid XHTML 1.0
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248. http://gcc.gnu.org/about.html
249. http://gcc.gnu.org/onlinedocs/
250. mailto:gcc-help@gcc.gnu.org
251. mailto:gcc@gnu.org
252. mailto:gcc@gcc.gnu.org
253. http://gcc.gnu.org/lists.html
254. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.1/index.html
GCC 3.1
July 27, 2002
The [1]GNU project and the GCC developers are pleased to announce the
release of GCC 3.1.1.
The links below still apply to GCC 3.1.1.
May 15, 2002
The [2]GNU project and the GCC developers are pleased to announce the
release of GCC 3.1.
GCC used to stand for the GNU C Compiler, but since the compiler
supports several other languages aside from C, it now stands for the
GNU Compiler Collection.
A list of [3]successful builds is updated as new information becomes
available.
The GCC developers would like to thank the numerous people that have
contributed [4]new features, improvements, bug fixes, and other
changes as well as test results to GCC. This [5]amazing group of
volunteers is what makes GCC successful.
For additional information about GCC please refer to the [6]GCC
project web site or contact the [7]GCC development mailing list.
To obtain GCC please use [8]our mirror sites, one of the [9]GNU mirror
sites, or [10]our CVS server.
_________________________________________________________________
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There
are also [12]other ways to contact the FSF.
These pages are maintained by [13]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [14]GCC manuals. If that fails, the
[15]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [16]gcc@gnu.org or
[17]gcc@gcc.gnu.org. All of our lists have [18]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [19]Valid XHTML 1.0
References
1. http://www.gnu.org/
2. http://www.gnu.org/
3. http://gcc.gnu.org/gcc-3.1/buildstat.html
4. http://gcc.gnu.org/gcc-3.1/changes.html
5. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
6. http://gcc.gnu.org/index.html
7. mailto:gcc@gcc.gnu.org
8. http://gcc.gnu.org/mirrors.html
9. http://www.gnu.org/order/ftp.html
10. http://gcc.gnu.org/cvs.html
11. mailto:gnu@gnu.org
12. http://www.gnu.org/home.html#ContactInfo
13. http://gcc.gnu.org/about.html
14. http://gcc.gnu.org/onlinedocs/
15. mailto:gcc-help@gcc.gnu.org
16. mailto:gcc@gnu.org
17. mailto:gcc@gcc.gnu.org
18. http://gcc.gnu.org/lists.html
19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.1/changes.html
GCC 3.1 Release Series
Changes, New Features, and Fixes
Additional changes in GCC 3.1.1
* A bug related to how structures and unions are returned has been
fixed for powerpc-*-netbsd*.
* An important bug in the implementation of -fprefetch-loop-arrays
has been fixed. Previously the optimization prefetched random
blocks of memory for most targets except for i386.
* The Java compiler now compiles Java programs much faster and also
works with parallel make.
* Nested functions have been fixed for mips*-*-netbsd*.
* Some missing floating point support routines have beed added for
mips*-*-netbsd*.
* This [1]message gives additional information about the bugs fixed
in this release.
Caveats
* The -traditional C compiler option has been deprecated and will be
removed in GCC 3.3. (It remains possible to preprocess non-C code
with the traditional preprocessor.)
* The default debugging format for most ELF platforms (including
GNU/Linux and FreeBSD; notable exception is Solaris) has changed
from stabs to DWARF2. This requires GDB 5.1.1 or later.
General Optimizer Improvements
* Jan Hubicka, SuSE Labs, together with Richard Henderson, Red Hat,
and Andreas Jaeger, SuSE Labs, has contributed [2]infrastructure
for profile driven optimizations.
Options -fprofile-arcs and -fbranch-probabilities can now be used
to improve speed of the generated code by profiling the actual
program behaviour on typical runs. In the absence of profile info
the compiler attempts to guess the profile statically.
* [3]SPEC2000 and SPEC95 benchmark suites are now used daily to
monitor performance of the generated code.
According to the SPECInt2000 results on an AMD Athlon CPU, the
code generated by GCC 3.1 is 6% faster on the average (8.2% faster
with profile feedback) compared to GCC 3.0. The code produced by
GCC 3.0 is about 2.1% faster compared to 2.95.3. Tests were done
using the -O2 -march=athlon command-line options.
* Alexandre Oliva, of Red Hat, has generalized the tree inlining
infrastructure developed by CodeSourcery, LLC for the C++ front
end, so that it is now used in the C front end too. Inlining
functions as trees exposes them earlier to the compiler, giving it
more opportunities for optimization.
* Support for data prefetching instructions has been added to the
GCC back end and several targets. A new __builtin_prefetch
intrinsic is available to explicitly insert prefetch instructions
and experimental support for loop array prefetching has been added
(see -fprefetch-loop-array documentation).
* Support for emitting debugging information for macros has been
added for DWARF2. It is activated using -g3.
New Languages and Language specific improvements
C/C++
* A few more [4]ISO C99 features.
* The preprocessor is 10-50% faster than the preprocessor in GCC
3.0.
* The preprocessor's symbol table has been merged with the symbol
table of the C, C++ and Objective-C front ends.
* The preprocessor consumes less memory than the preprocessor in GCC
3.0, often significantly so. On normal input files, it typically
consumes less memory than pre-3.0 cccp-based GCC, too.
C++
* -fhonor-std and -fno-honor-std have been removed. -fno-honor-std
was a workaround to allow std compliant code to work with the
non-std compliant libstdc++-v2. libstdc++-v3 is std compliant.
* The C++ ABI has been fixed so that void (A::*)() const is mangled
as "M1AKFvvE", rather than "MK1AFvvE" as before. This change only
affects pointer to cv-qualified member function types.
* The C++ ABI has been changed to correctly handle this code:
struct A {
void operator delete[] (void *, size_t);
};
struct B : public A {
};
new B[10];
The amount of storage allocated for the array will be greater than
it was in 3.0, in order to store the number of elements in the
array, so that the correct size can be passed to operator delete[]
when the array is deleted. Previously, the value passed to
operator delete[] was unpredictable.
This change will only affect code that declares a two-argument
operator delete[] with a second parameter of type size_t in a base
class, and does not override that definition in a derived class.
* The C++ ABI has been changed so that:
struct A {
void operator delete[] (void *, size_t);
void operator delete[] (void *);
};
does not cause unnecessary storage to be allocated when an array
of A objects is allocated.
This change will only affect code that declares both of these
forms of operator delete[], and declared the two-argument form
before the one-argument form.
* The C++ ABI has been changed so that when a parameter is passed by
value, any cleanup for that parameter is performed in the caller,
as specified by the ia64 C++ ABI, rather than the called function
as before. As a result, classes with a non-trivial destructor but
a trivial copy constructor will be passed and returned by
invisible reference, rather than by bitwise copy as before.
* G++ now supports the "named return value optimization": for code
like
A f () {
A a;
...
return a;
}
G++ will allocate a in the return value slot, so that the return
becomes a no-op. For this to work, all return statements in the
function must return the same variable.
* Improvements to the C++ library are listed in [5]the libstdc++-v3
FAQ.
Objective-C
* Annoying linker warnings (due to incorrect code being generated)
have been fixed.
* If a class method cannot be found, the compiler no longer issues a
warning if a corresponding instance method exists in the root
class.
* Forward @protocol declarations have been fixed.
* Loading of categories has been fixed in certain situations (GNU
run time only).
* The class lookup in the run-time library has been rewritten so
that class method dispatch is more than twice as fast as it used
to be (GNU run time only).
Java
* libgcj now includes RMI, java.lang.ref.*, javax.naming, and
javax.transaction.
* Property files and other system resources can be compiled into
executables which use libgcj using the new gcj --resource feature.
* libgcj has been ported to more platforms. In particular there is
now a mostly-functional mingw32 (Windows) target port.
* JNI and CNI invocation interfaces were implemented, so
gcj-compiled Java code can now be called from a C/C++ application.
* gcj can now use builtin functions for certain known methods, for
instance Math.cos.
* gcj can now automatically remove redundant array-store checks in
some common cases.
* The --no-store-checks optimization option was added. This can be
used to omit runtime store checks for code which is known not to
throw ArrayStoreException
* The following third party interface standards were added to
libgcj: org.w3c.dom and org.xml.sax.
* java.security has been merged with GNU Classpath. The new package
is now JDK 1.2 compliant, and much more complete.
* A bytecode verifier was added to the libgcj interpreter.
* java.lang.Character was rewritten to comply with the Unicode 3.0
standard, and improve performance.
* Partial support for many more locales was added to libgcj.
* Socket timeouts have been implemented.
* libgcj has been merged into a single shared library. There are no
longer separate shared libraries for the garbage collector and
zlib.
* Several performance improvements were made to gcj and libgcj:
+ Hash synchronization (thin locks)
+ A special allocation path for finalizer-free objects
+ Thread-local allocation
+ Parallel GC, and other GC tweaks
Fortran
Fortran improvements are listed in [6]the Fortran documentation.
Ada
[7]Ada Core Technologies, Inc, has contributed its GNAT Ada 95 front
end and associated tools. The GNAT compiler fully implements the Ada
language as defined by the ISO/IEC 8652 standard.
Please note that the integration of the Ada front end is still work in
progress.
New Targets and Target Specific Improvements
* Hans-Peter Nilsson has contributed a port to [8]MMIX, the CPU
architecture used in new editions of Donald E. Knuth's The Art of
Computer Programming.
* [9]Axis Communications has contributed its port to the CRIS CPU
architecture, used in the ETRAX system-on-a-chip series. See
[10]Axis' developer site for technical information.
* Alexandre Oliva, of Red Hat, has contributed a port to the
[11]SuperH SH5 64-bit RISC microprocessor architecture, extending
the existing SH port.
* UltraSPARC is fully supported in 64-bit mode. The option -m64
enables it.
* For compatibility with the Sun compiler #pragma redefine_extname
has been implemented on Solaris.
* The x86 back end has had some noticeable work done to it.
+ SuSE Labs developers Jan Hubicka, Bo Thorsen and Andreas
Jaeger have contributed a port to the AMD x86-64
architecture. For more information on x86-64 see
[12]http://www.x86-64.org.
+ The compiler now supports MMX, 3DNow!, SSE, and SSE2
instructions. Options -mmmx, -m3dnow, -msse, and -msse2 will
enable the respective instruction sets. Intel C++ compatible
MMX/3DNow!/SSE intrinsics are implemented. SSE2 intrinsics
will be added in next major release.
+ Following those improvements, targets for Pentium MMX, K6-2,
K6-3, Pentium III, Pentium 4, and Athlon 4 Mobile/XP/MP were
added. Refer to the documentation on -march= and -mcpu=
options for details.
+ For those targets that support it, -mfpmath=sse will cause
the compiler to generate SSE/SSE2 instructions for floating
point math instead of x87 instructions. Usually, this will
lead to quicker code -- especially on the Pentium 4. Note
that only scalar floating point instructions are used and GCC
does not exploit SIMD features yet.
+ Prefetch support has been added to the Pentium III, Pentium
4, K6-2, K6-3, and Athlon series.
+ Code generated for floating point to integer conversions has
been improved leading to better performance of many 3D
applications.
* The PowerPC back end has added 64-bit PowerPC GNU/Linux support.
* C++ support for AIX has been improved.
* Aldy Hernandez, of Red Hat, Inc, has contributed extensions to the
PowerPC port supporting the AltiVec programming model (SIMD). The
support, though presently useful, is experimental and is expected
to stabilize for 3.2. The support is written to conform to
Motorola's AltiVec specs. See -maltivec.
Obsolete Systems
Support for a number of older systems has been declared obsolete in
GCC 3.1. Unless there is activity to revive them, the next release of
GCC will have their sources permanently removed.
All configurations of the following processor architectures have been
declared obsolete:
* MIL-STD-1750A, 1750a-*-*
* AMD A29k, a29k-*-*
* Convex, c*-convex-*
* Clipper, clipper-*-*
* Elxsi, elxsi-*-*
* Intel i860, i860-*-*
* Sun picoJava, pj-*-* and pjl-*-*
* Western Electric 32000, we32k-*-*
Most configurations of the following processor architectures have been
declared obsolete, but we are preserving a few systems which may have
active developers. It is unlikely that the remaining systems will
survive much longer unless we see definite signs of port activity.
* Motorola 88000 except
+ Generic a.out, m88k-*-aout*
+ Generic SVR4, m88k-*-sysv4
+ OpenBSD, m88k-*-openbsd*
* NS32k except
+ NetBSD, ns32k-*-netbsd*
+ OpenBSD, ns32k-*-openbsd*.
* ROMP except
+ OpenBSD, romp-*-openbsd*.
Finally, only some configurations of these processor architectures are
being obsoleted.
* Alpha:
+ OSF/1, alpha*-*-osf[123]*. (Digital Unix and Tru64 Unix, aka
alpha*-*-osf[45], are still supported.)
* ARM:
+ RISCiX, arm-*-riscix*.
* i386:
+ 386BSD, i?86-*-bsd*
+ Chorus, i?86-*-chorusos*
+ DG/UX, i?86-*-dgux*
+ FreeBSD 1.x, i?86-*-freebsd1.*
+ IBM AIX, i?86-*-aix*
+ ISC UNIX, i?86-*-isc*
+ Linux with pre-BFD linker, i?86-*-linux*oldld*
+ NEXTstep, i?86-next-*
+ OSF UNIX, i?86-*-osf1* and i?86-*-osfrose*
+ RTEMS/coff, i?86-*-rtemscoff*
+ RTEMS/go32, i?86-go32-rtems*
+ Sequent/BSD, i?86-sequent-bsd*
+ Sequent/ptx before version 3, i?86-sequent-ptx[12]* and
i?86-sequent-sysv3*
+ SunOS, i?86-*-sunos*
* Motorola 68000:
+ Altos, m68[k0]*-altos-*
+ Apollo, m68[k0]*-apollo-*
+ Apple A/UX, m68[k0]*-apple-*
+ Bull, m68[k0]*-bull-*
+ Convergent, m68[k0]*-convergent-*
+ Generic SVR3, m68[k0]*-*-sysv3*
+ ISI, m68[k0]*-isi-*
+ LynxOS, m68[k0]*-*-lynxos*
+ NEXT, m68[k0]*-next-*
+ RTEMS/coff, m68[k0]*-*-rtemscoff*
+ Sony, m68[k0]*-sony-*
* MIPS:
+ DEC Ultrix, mips-*-ultrix* and mips-dec-*
+ Generic BSD, mips-*-bsd*
+ Generic System V, mips-*-sysv*
+ IRIX before version 5, mips-sgi-irix[1234]*
+ RiscOS, mips-*-riscos*
+ Sony, mips-sony-*
+ Tandem, mips-tandem-*
* SPARC:
+ RTEMS/a.out, sparc-*-rtemsaout*.
Documentation improvements
* The old manual ("Using and Porting the GNU Compiler Collection")
has been replaced by a users manual ("Using the GNU Compiler
Collection") and a separate internals reference manual ("GNU
Compiler Collection Internals").
* More complete and much improved documentation about GCC's internal
representation used by the C and C++ front ends.
* Many cleanups and improvements in general.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [13]gnu@gnu.org. There
are also [14]other ways to contact the FSF.
These pages are maintained by [15]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [16]GCC manuals. If that fails, the
[17]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [18]gcc@gnu.org or
[19]gcc@gcc.gnu.org. All of our lists have [20]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [21]Valid XHTML 1.0
References
1. http://gcc.gnu.org/ml/gcc/2002-07/msg01208.html
2. http://gcc.gnu.org/news/profiledriven.html
3. http://gcc.gnu.org/benchmarks/
4. http://gcc.gnu.org/gcc-3.1/c99status.html
5. http://gcc.gnu.org/onlinedocs/libstdc++/faq/index.html#4_1
6. http://gcc.gnu.org/onlinedocs/g77/News.html
7. http://www.gnat.com/
8. http://www-cs-faculty.stanford.edu/~knuth/mmix.html
9. http://www.axis.com/
10. http://developer.axis.com/
11. http://www.superh.com/
12. http://www.x86-64.org/
13. mailto:gnu@gnu.org
14. http://www.gnu.org/home.html#ContactInfo
15. http://gcc.gnu.org/about.html
16. http://gcc.gnu.org/onlinedocs/
17. mailto:gcc-help@gcc.gnu.org
18. mailto:gcc@gnu.org
19. mailto:gcc@gcc.gnu.org
20. http://gcc.gnu.org/lists.html
21. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/gcc-3.0.html
GCC 3.0.4
February 20, 2002
The [1]GNU project and the GCC developers are pleased to announce the
release of GCC 3.0.4, which is a bug-fix release for the GCC 3.0
series.
GCC used to stand for the GNU C Compiler, but since the compiler
supports several other languages aside from C, it now stands for the
GNU Compiler Collection.
GCC 3.0.x has several new optimizations, new targets, new languages
and many other new features, relative to GCC 2.95.x. See the [2]new
features page for a more complete list.
A list of [3]successful builds is updated as new information becomes
available.
The GCC developers would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc to GCC. This
[4]amazing group of volunteers is what makes GCC successful.
And finally, we can't in good conscience fail to mention some
[5]caveats to using GCC 3.0.x.
For additional information about GCC please refer to the [6]GCC
project web site or contact the [7]GCC development mailing list.
To obtain GCC please use [8]our mirror sites, one of the [9]GNU mirror
sites, or [10]our CVS server.
_________________________________________________________________
Previous 3.0.x Releases
December 20, 2001: GCC 3.0.3 has been released.
October 25, 2001: GCC 3.0.2 has been released.
August 20, 2001: GCC 3.0.1 has been released.
June 18, 2001: GCC 3.0 has been released.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There
are also [12]other ways to contact the FSF.
These pages are maintained by [13]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [14]GCC manuals. If that fails, the
[15]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [16]gcc@gnu.org or
[17]gcc@gcc.gnu.org. All of our lists have [18]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [19]Valid XHTML 1.0
References
1. http://www.gnu.org/
2. http://gcc.gnu.org/gcc-3.0/features.html
3. http://gcc.gnu.org/gcc-3.0/buildstat.html
4. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
5. http://gcc.gnu.org/gcc-3.0/caveats.html
6. http://gcc.gnu.org/index.html
7. mailto:gcc@gcc.gnu.org
8. http://gcc.gnu.org/mirrors.html
9. http://www.gnu.org/order/ftp.html
10. http://gcc.gnu.org/cvs.html
11. mailto:gnu@gnu.org
12. http://www.gnu.org/home.html#ContactInfo
13. http://gcc.gnu.org/about.html
14. http://gcc.gnu.org/onlinedocs/
15. mailto:gcc-help@gcc.gnu.org
16. mailto:gcc@gnu.org
17. mailto:gcc@gcc.gnu.org
18. http://gcc.gnu.org/lists.html
19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/features.html
GCC 3.0 New Features
Additional changes in GCC 3.0.4
* GCC 3.0 now supports newer versions of the [1]NetBSD operating
system, which use the ELF object file format, on x86 processors.
* Correct debugging information is generated from functions that
have lines from multiple files (e.g. yacc output).
* A fix for whitespace handling in the -traditional preprocessor,
which can affect Fortran.
* Fixes to the exception handling runtime.
* More fixes for bad code generation in C++.
* A fix for shared library generation under AIX 4.3.
* Documentation updates.
* Port of GCC to Tensilica's Xtensa processor contributed.
* A fix for compiling the PPC Linux kernel (FAT fs wouldn't link).
Additional changes in GCC 3.0.3
* A fix to correct an accidental change to the PowerPC ABI.
* Fixes for bad code generation on a variety of architectures.
* Improvements to the debugging information generated for C++
classes.
* Fixes for bad code generation in C++.
* A fix to avoid crashes in the C++ demangler.
* A fix to the C++ standard library to avoid buffer overflows.
* Miscellaneous improvements for a variety of architectures.
Additional changes in GCC 3.0.2
* Fixes for bad code generation during loop unrolling.
* Fixes for bad code generation by the sibling call optimization.
* Minor improvements to x86 code generation.
* Implementation of function descriptors in C++ vtables for IA64.
* Numerous minor bug-fixes.
Additional changes in GCC 3.0.1
* C++ fixes for incorrect code-generation.
* Improved cross-compiling support for the C++ standard library.
* Fixes for some embedded targets that worked in GCC 2.95.3, but not
in GCC 3.0.
* Fixes for various exception-handling bugs.
* A port to the S/390 architecture.
General Optimizer Improvements
* [2]Basic block reordering pass.
* New if-conversion pass with support for conditional (predicated)
execution.
* New tail call and sibling call elimination optimizations.
* New register renaming pass.
* New (experimental) [3]static single assignment (SSA)
representation support.
* New dead-code elimination pass implemented using the SSA
representation.
* [4]Global null pointer test elimination.
* [5]Global code hoisting/unification.
* More builtins and optimizations for stdio.h, string.h and old BSD
functions, as well as for ISO C99 functions.
* New builtin __builtin_expect for giving hints to the branch
predictor.
New Languages and Language specific improvements
* The GNU Compiler for the Java(TM) language (GCJ) is now integrated
and supported, including the run-time library containing most
common non-GUI Java classes, a bytecode interpreter, and the Boehm
conservative garbage collector. Many bugs have been fixed. GCJ can
compile Java source or Java bytecodes to either native code or
Java class files, and supports native methods written in either
the standard JNI or the more efficient and convenient CNI.
* Here is a [6]partial list of C++ improvements, both new features
and those no longer supported.
* New C++ ABI. On the IA-64 platform GCC is capable of
inter-operating with other IA-64 compilers.
* The new ABI also significantly reduces the size of symbol and
debug information.
* New [7]C++ support library and many C++ bug fixes, vastly
improving our conformance to the ISO C++ standard.
* New [8]inliner for C++.
* Rewritten C preprocessor, integrated into the C, C++ and Objective
C compilers, with very many improvements including ISO C99 support
and [9]improvements to dependency generation.
* Support for more [10]ISO C99 features.
* Many improvements to support for checking calls to format
functions such as printf and scanf, including support for ISO C99
format features, extensions from the Single Unix Specification and
GNU libc 2.2, checking of strfmon formats and features to assist
in auditing for format string security bugs.
* New warnings for C code that may have undefined semantics because
of violations of sequence point rules in the C standard (such as a
= a++;, a[n] = b[n++]; and a[i++] = i;), included in -Wall.
* Additional warning option -Wfloat-equal.
* Improvements to -Wtraditional.
* Fortran improvements are listed in [11]the Fortran documentation.
New Targets and Target Specific Improvements
* New x86 back-end, generating much improved code.
* Support for a generic i386-elf target contributed.
* New option to emit x86 assembly code using Intel style syntax
(-mintel-syntax).
* HPUX 11 support contributed.
* Improved PowerPC code generation, including scheduled prologue and
epilogue.
* Port of GCC to Intel's IA-64 processor contributed.
* Port of GCC to Motorola's MCore 210 and 340 contributed.
* New unified back-end for Arm, Thumb and StrongArm contributed.
* Port of GCC to Intel's XScale processor contributed.
* Port of GCC to Atmel's AVR microcontrollers contributed.
* Port of GCC to Mitsubishi's D30V processor contributed.
* Port of GCC to Matsushita's AM33 processor (a member of the
MN10300 processor family) contributed.
* Port of GCC to Fujitsu's FR30 processor contributed.
* Port of GCC to Motorola's 68HC11 and 68HC12 processors
contributed.
* Port of GCC to Sun's picoJava processor core contributed.
Documentation improvements
* Substantially rewritten and improved C preprocessor manual.
* Many improvements to other documentation.
* Manpages for gcc, cpp and gcov are now generated automatically
from the master Texinfo manual, eliminating the problem of
manpages being out of date. (The generated manpages are only
extracts from the full manual, which is provided in Texinfo form,
from which info, HTML, other formats and a printed manual can be
generated.)
* Generated info files are included in the release tarballs
alongside their Texinfo sources, avoiding problems on some
platforms with building makeinfo as part of the GCC distribution.
Other significant improvements
* Garbage collection used internally by the compiler for most memory
allocation instead of obstacks.
* Lengauer and Tarjan algorithm used for computing dominators in the
CFG. This algorithm can be significantly faster and more space
efficient than our older algorithm.
* gccbug script provided to assist in submitting bug reports to our
bug tracking system. (Bug reports previously submitted directly to
our mailing lists, for which you received no bug tracking number,
should be submitted again using gccbug if you can reproduce the
problem with GCC 3.0.)
* The internal libgcc library is [12]built as a shared library on
systems that support it.
* Extensive testsuite included with GCC, with many new tests. In
addition to tests for GCC bugs that have been fixed, many tests
have been added for language features, compiler warnings and
builtin functions.
* Additional language-independent warning options -Wpacked,
-Wpadded, -Wunreachable-code and -Wdisabled-optimization.
* Target-independent options -falign-functions, -falign-loops and
-falign-jumps.
Plus a great many bugfixes and almost all the [13]features found in
GCC 2.95.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [14]gnu@gnu.org. There
are also [15]other ways to contact the FSF.
These pages are maintained by [16]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [17]GCC manuals. If that fails, the
[18]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [19]gcc@gnu.org or
[20]gcc@gcc.gnu.org. All of our lists have [21]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [22]Valid XHTML 1.0
References
1. http://www.netbsd.org/
2. http://gcc.gnu.org/news/reorder.html
3. http://gcc.gnu.org/news/ssa.html
4. http://gcc.gnu.org/news/null.html
5. http://gcc.gnu.org/news/unify.html
6. http://gcc.gnu.org/gcc-3.0/c++features.html
7. http://gcc.gnu.org/libstdc++/
8. http://gcc.gnu.org/news/inlining.html
9. http://gcc.gnu.org/news/dependencies.html
10. http://gcc.gnu.org/gcc-3.0/c99status.html
11. http://gcc.gnu.org/onlinedocs/g77/News.html
12. http://gcc.gnu.org/gcc-3.0/libgcc.html
13. http://gcc.gnu.org/gcc-2.95/features.html
14. mailto:gnu@gnu.org
15. http://www.gnu.org/home.html#ContactInfo
16. http://gcc.gnu.org/about.html
17. http://gcc.gnu.org/onlinedocs/
18. mailto:gcc-help@gcc.gnu.org
19. mailto:gcc@gnu.org
20. mailto:gcc@gcc.gnu.org
21. http://gcc.gnu.org/lists.html
22. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/caveats.html
GCC 3.0 Caveats
* -fstrict-aliasing is now part of -O2 and higher optimization
levels. This allows the compiler to assume the strictest aliasing
rules applicable to the language being compiled. For C and C++,
this activates optimizations based on the type of expressions.
This optimization may thus break old, non-compliant code.
* Enumerations are now properly promoted to int in function
parameters and function returns. Normally this change is not
visible, but when using -fshort-enums this is an ABI change.
* The undocumented extension that allowed C programs to have a label
at the end of a compound statement has been deprecated and may be
removed in a future version. Programs that now generate a warning
about this may be fixed by adding a null statement (a single
semicolon) after the label.
* The poorly documented extension that allowed string constants in
C, C++ and Objective C to contain unescaped newlines has been
deprecated and may be removed in a future version. Programs using
this extension may be fixed in several ways: the bare newline may
be replaced by \n, or preceded by \n\, or string concatenation may
be used with the bare newline preceded by \n" and " placed at the
start of the next line.
* The Chill compiler is not included in GCC 3.0, because of the lack
of a volunteer to convert it to use garbage collection.
* Certain non-standard iostream methods from earlier versions of
libstdc++ are not included in libstdc++ v3, i.e. filebuf::attach,
ostream::form, and istream::gets. Here are workaround hints for:
[1]ostream::form, [2]filebuf::attach.
* The new C++ ABI is not yet fully supported by current (as of
2001-07-01) releases and development versions of GDB, or any
earlier versions. There is a problem setting breakpoints by line
number, and other related issues that have been fixed in GCC 3.0
but not yet handled in GDB:
[3]http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg00421.html
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [4]gnu@gnu.org. There
are also [5]other ways to contact the FSF.
These pages are maintained by [6]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [7]GCC manuals. If that fails, the
[8]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [9]gcc@gnu.org or
[10]gcc@gcc.gnu.org. All of our lists have [11]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [12]Valid XHTML 1.0
References
1. http://gcc.gnu.org/onlinedocs/libstdc++/21_strings/howto.html
2. http://gcc.gnu.org/onlinedocs/libstdc++/ext/howto.html
3. http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg00421.html
4. mailto:gnu@gnu.org
5. http://www.gnu.org/home.html#ContactInfo
6. http://gcc.gnu.org/about.html
7. http://gcc.gnu.org/onlinedocs/
8. mailto:gcc-help@gcc.gnu.org
9. mailto:gcc@gnu.org
10. mailto:gcc@gcc.gnu.org
11. http://gcc.gnu.org/lists.html
12. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/index.html
GCC 2.95
July 31, 1999: The GNU project and the GCC/EGCS developers are pleased
to announce the release of GCC version 2.95. This is the first release
of GCC since the April 1999 GCC/EGCS reunification and includes nearly
a year's worth of new development and bugfixes.
August 19, 1999: GCC version 2.95.1 has been released.
October 27, 1999: GCC version 2.95.2 has been released.
March 16, 2001: GCC version 2.95.3 has been released.
GCC used to stand for the GNU C Compiler, but since the compiler
supports several other languages aside from C, it now stands for the
GNU Compiler Collection.
The whole suite has been extensively [1]regression tested and
[2]package tested. It should be reliable and suitable for widespread
use.
The compiler has several new optimizations, new targets, new languages
and other new features. See the [3]new features page for a more
complete list of new features found in the GCC 2.95 releases.
The sources include installation instructions in both HTML and
plaintext forms in the install directory in the distribution. However,
the most up to date [4]installation instructions and [5]build/test
status are on the web pages. We will update those pages as new
information becomes available.
The GCC developers would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc to GCC. This
[6]amazing group of volunteers is what makes GCC successful.
And finally, we can't in good conscience fail to mention some
[7]caveats to using GCC 2.95.
Download GCC 2.95 from the [8]GNU FTP server (ftp://ftp.gnu.org)
[9]Find a GNU mirror site
[10]Find a GCC mirror site
For additional information about GCC please see the [11]GCC project
web server or contact the [12]GCC development mailing list.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [13]gnu@gnu.org. There
are also [14]other ways to contact the FSF.
These pages are maintained by [15]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [16]GCC manuals. If that fails, the
[17]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [18]gcc@gnu.org or
[19]gcc@gcc.gnu.org. All of our lists have [20]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [21]Valid XHTML 1.0
References
1. http://gcc.gnu.org/gcc-2.95/regress.html
2. http://gcc.gnu.org/gcc-2.95/othertest.html
3. http://gcc.gnu.org/gcc-2.95/features.html
4. http://gcc.gnu.org/install/
5. http://gcc.gnu.org/gcc-2.95/buildstat.html
6. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
7. http://gcc.gnu.org/gcc-2.95/caveats.html
8. ftp://ftp.gnu.org/pub/gnu/gcc/
9. http://www.gnu.org/order/ftp.html
10. http://gcc.gnu.org/mirrors.html
11. http://gcc.gnu.org/index.html
12. mailto:gcc@gcc.gnu.org
13. mailto:gnu@gnu.org
14. http://www.gnu.org/home.html#ContactInfo
15. http://gcc.gnu.org/about.html
16. http://gcc.gnu.org/onlinedocs/
17. mailto:gcc-help@gcc.gnu.org
18. mailto:gcc@gnu.org
19. mailto:gcc@gcc.gnu.org
20. http://gcc.gnu.org/lists.html
21. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/features.html
GCC 2.95 New Features
* General Optimizer Improvements:
+ [1]Localized register spilling to improve speed and code
density especially on small register class machines.
+ [2]Global CSE using lazy code motion algorithms.
+ [3]Improved global constant/copy propagation.
+ [4]Improved control flow graph analysis and manipulation.
+ [5]Local dead store elimination.
+ [6]Memory Load hoisting/store sinking in loops.
+ [7]Type based alias analysis is enabled by default. Note this
feature will expose bugs in the Linux kernel. Please refer to
the FAQ (as shipped with GCC 2.95) for additional information
on this issue.
+ Major revamp of GIV detection, combination and simplification
to improve loop performance.
+ Major improvements to register allocation and reloading.
* New Languages and Language specific improvements
+ [8]Many C++ improvements.
+ [9]Many Fortran improvements.
+ [10]Java front-end has been integrated. [11]runtime library
is available separately.
+ [12]ISO C99 support
+ [13]Chill front-end and runtime has been integrated.
+ Boehm garbage collector support in libobjc.
+ More support for various pragmas which appear in vendor
include files
* New Targets and Target Specific Improvements
+ [14]SPARC backend rewrite.
+ -mschedule=8000 will optimize code for PA8000 class
processors; -mpa-risc-2-0 will generate code for PA2.0
processors
+ Various micro-optimizations for the ia32 port. K6
optimizations
+ Compiler will attempt to align doubles in the stack on the
ia32 port
+ Alpha EV6 support
+ PowerPC 750
+ RS6000/PowerPC: -mcpu=401 was added as an alias for
-mcpu=403. -mcpu=e603e was added to do -mcpu=603e and
-msoft-float.
+ c3x, c4x
+ HyperSPARC
+ SparcLite86x
+ sh4
+ Support for new systems (OpenBSD, FreeBSD, UWIN, Interix,
arm-linux)
+ vxWorks targets include support for vxWorks threads
+ StrongARM 110 and ARM9 support added. ARM Scheduling
parameters rewritten.
+ Various changes to the MIPS port to avoid assembler macros,
which in turn improves performance
+ Various performance improvements to the i960 port.
+ Major rewrite of ns32k port
* Other significant improvements
+ [15]Ability to dump cfg information and display it using vcg.
+ The new faster scheme for fixing vendor header files is
enabled by default.
+ Experimental internationalization support.
+ multibyte character support
+ Some compile-time speedups for pathological problems
+ Better support for complex types
* Plus the usual mountain of bugfixes
* Core compiler is based on the gcc2 development tree from Sept 30,
1998, so we have all of the [16]features found in GCC 2.8.
Additional Changes in GCC 2.95.1
* Generic bugfixes and improvements
+ Various documentation fixes related to the GCC/EGCS merger.
+ Fix memory management bug which could lead to spurious
aborts, core dumps or random parsing errors in the compiler.
+ Fix a couple bugs in the dwarf1 and dwarf2 debug record
support.
+ Fix infinite loop in the CSE optimizer.
+ Avoid undefined behavior in compiler FP emulation code
+ Fix install problem when prefix is overridden on the make
install command.
+ Fix problem with unwanted installation of assert.h on some
systems.
+ Fix problem with finding the wrong assembler in a single tree
build.
+ Avoid increasing the known alignment of a register that is
already known to be a pointer.
* Platform specific bugfixes and improvements
+ Codegen bugfix for prologue/epilogue for cpu32 target.
+ Fix long long code generation bug for the Coldfire target.
+ Fix various aborts in the SH compiler.
+ Fix bugs in libgcc support library for the SH.
+ Fix alpha ev6 code generation bug.
+ Fix problems with EXIT_SUCCESS/EXIT_FAILURE redefinitions on
AIX platforms.
+ Fix -fpic code generation bug for rs6000/ppc svr4 targets.
+ Fix varargs/stdarg code generation bug for rs6000/ppc svr4
targets.
+ Fix weak symbol handling for rs6000/ppc svr4 targets.
+ Fix various problems with 64bit code generation for the
rs6000/ppc port.
+ Fix codegen bug which caused tetex to be mis-compiled on the
x86.
+ Fix compiler abort in new cfg code exposed by x86 port.
+ Fix out of range array reference in code convert flat
registers to the x87 stacked FP register file.
+ Fix minor vxworks configuration bug.
+ Fix return type of bsearch for SunOS 4.x.
* Language & Runtime specific fixes.
+ The G++ signature extension has been deprecated. It will be
removed in the next major release of G++. Use of signatures
will result in a warning from the compiler.
+ Several bugs relating to templates and namespaces were fixed.
+ A bug that caused crashes when combining templates with -g on
DWARF1 platforms was fixed.
+ Pointers-to-members, virtual functions, and multiple
inheritance should now work together correctly.
+ Some code-generation bugs relating to function try blocks
were fixed.
+ G++ is a little bit more lenient with certain archaic
constructs than in GCC 2.95.
+ Fix to prevent shared library version #s from bring truncated
to 1 digit
+ Fix missing std:: in the libstdc++ library.
+ Fix stream locking problems in libio.
+ Fix problem in java compiler driver.
Additional Changes in GCC 2.95.2
The -fstrict-aliasing is not enabled by default for GCC 2.95.2. While
the optimizations performed by -fstrict-aliasing are valid according
to the C and C++ standards, the optimization have caused some
problems, particularly with old non-conforming code.
The GCC developers are experimenting with ways to warn users about
code which violates the C/C++ standards, but those warnings are not
ready for widespread use at this time. Rather than wait for those
warnings the GCC developers have chosen to disable -fstrict-aliasing
by default for the GCC 2.95.2 release.
We strongly encourage developers to find and fix code which violates
the C/C++ standards as -fstrict-aliasing may be enabled by default in
future releases. Use the option -fstrict-aliasing to re-enable these
optimizations.
* Generic bugfixes and improvements
+ Fix incorrectly optimized memory reference in global common
subexpression elimination (GCSE) optimization pass.
+ Fix code generation bug in regmove.c in which it could
incorrectly change a "const" value.
+ Fix bug in optimization of conditionals involving volatile
memory references.
+ Avoid over-allocation of stack space for some procedures.
+ Fixed bug in the compiler which caused incorrect optimization
of an obscure series of bit manipulations, shifts and
arithmetic.
+ Fixed register allocator bug which caused teTeX to be
mis-compiled on SPARC targets.
+ Avoid incorrect optimization of degenerate case statements
for certain targets such as the ARM.
+ Fix out of range memory reference in the jump optimizer.
+ Avoid dereferencing null pointer in fix-header.
+ Fix test for GCC specific features so that it is possible to
bootstrap with gcc-2.6.2 and older versions of GCC.
+ Fix typo in scheduler which could potentially cause out of
range memory accesses.
+ Avoid incorrect loop reversal which caused incorrect code for
certain loops on PowerPC targets.
+ Avoid incorrect optimization of switch statements on certain
targets (for example the ARM).
* Platform specific bugfixes and improvements
+ Work around bug in Sun V5.0 compilers which caused bootstrap
comparison failures on SPARC targets.
+ Fix SPARC backend bug which caused aborts in final.c.
+ Fix sparc-hal-solaris2* configuration fragments.
+ Fix bug in sparc block profiling.
+ Fix obscure code generation bug for the PARISC targets.
+ Define __STDC_EXT__ for HPUX configurations.
+ Various POWERPC64 code generation bugfixes.
+ Fix abort for PPC targets using ELF (ex GNU/Linux).
+ Fix collect2 problems for AIX targets.
+ Correct handling of .file directive for PPC targets.
+ Fix bug in fix_trunc x86 patterns.
+ Fix x86 port to correctly pop the FP stack for functions that
return structures in memory.
+ Fix minor bug in strlen x86 pattern.
+ Use stabs debugging instead of dwarf1 for x86-solaris
targets.
+ Fix template repository code to handle leading underscore in
mangled names.
+ Fix weak/weak alias support for OpenBSD.
+ GNU/Linux for the ARM has C++ compatible include files.
* Language & Runtime specific fixes.
+ Fix handling of constructor attribute in the C front-end
which caused problems building the Chill runtime library on
some targets.
+ Fix minor problem merging type qualifiers in the C front-end.
+ Fix aliasing bug for pointers and references (C/C++).
+ Fix incorrect "non-constant initializer bug" when
-traditional or -fwritable-strings is enabled.
+ Fix build error for Chill front-end on SunOS.
+ Do not complain about duplicate instantiations when using
-frepo (C++).
+ Fix array bounds handling in C++ front-end which caused
problems with dwarf debugging information in some
circumstances.
+ Fix minor namespace problem.
+ Fix problem linking java programs.
Additional Changes in GCC 2.95.3
* Generic bugfixes and improvements
+ Fix numerous problems that caused incorrect optimization in
the register reloading code.
+ Fix numerous problems that caused incorrect optimization in
the loop optimizer.
+ Fix aborts in the functions build_insn_chain and scan_loops
under some circumstances.
+ Fix an alias analysis bug.
+ Fix an infinite compilation bug in the combiner.
+ A few problems with complex number support have been fixed.
+ It is no longer possible for gcc to act as a fork bomb when
installed incorrectly.
+ The -fpack-struct option should be recognized now.
+ Fixed a bug that caused incorrect code to be generated due to
a lost stack adjustment.
* Platform specific bugfixes and improvements
+ Support building ARM toolchains hosted on Windows.
+ Fix attribute calculations in ARM toolchains.
+ arm-linux support has been improved.
+ Fix a PIC failure on sparc targets.
+ On ix86 targets, the regparm attribute should now work
reliably.
+ Several updates for the h8300 port.
+ Fix problem building libio with glibc 2.2.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [17]gnu@gnu.org. There
are also [18]other ways to contact the FSF.
These pages are maintained by [19]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [20]GCC manuals. If that fails, the
[21]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [22]gcc@gnu.org or
[23]gcc@gcc.gnu.org. All of our lists have [24]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [25]Valid XHTML 1.0
References
1. http://gcc.gnu.org/news/spill.html
2. http://gcc.gnu.org/news/lcm.html
3. http://gcc.gnu.org/news/cprop.html
4. http://gcc.gnu.org/news/cfg.html
5. http://gcc.gnu.org/news/dse.html
6. http://gcc.gnu.org/news/hoist.html
7. http://gcc.gnu.org/news/alias.html
8. http://gcc.gnu.org/gcc-2.95/c++features.html
9. http://gcc.gnu.org/onlinedocs/g77/News.html
10. http://gcc.gnu.org/java/gcj-announce.txt
11. http://gcc.gnu.org/news/javaannounce.html
12. http://gcc.gnu.org/c99status.html
13. http://gcc.gnu.org/news/chill.html
14. http://gcc.gnu.org/news/sparc.html
15. http://gcc.gnu.org/news/egcs-vcg.html
16. http://gcc.gnu.org/egcs-1.0/features-2.8.html
17. mailto:gnu@gnu.org
18. http://www.gnu.org/home.html#ContactInfo
19. http://gcc.gnu.org/about.html
20. http://gcc.gnu.org/onlinedocs/
21. mailto:gcc-help@gcc.gnu.org
22. mailto:gcc@gnu.org
23. mailto:gcc@gcc.gnu.org
24. http://gcc.gnu.org/lists.html
25. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/caveats.html
GCC 2.95 Caveats
* GCC 2.95 will issue an error for invalid asm statements that had
been silently accepted by earlier versions of the compiler. This
is particularly noticeable when compiling older versions of the
Linux kernel (2.0.xx). Please refer to the FAQ (as shipped with
GCC 2.95) for more information on this issue.
* GCC 2.95 implements type based alias analysis to disambiguate
memory references. Some programs, particularly the Linux kernel
violate ANSI/ISO aliasing rules and therefore may not operate
correctly when compiled with GCC 2.95. Please refer to the FAQ (as
shipped with GCC 2.95) for more information on this issue.
* GCC 2.95 has a known bug in its handling of complex variables for
64bit targets. Instead of silently generating incorrect code, GCC
2.95 will issue a fatal error for situations it can not handle.
This primarily affects the Fortran community as Fortran makes more
use of complex variables than C or C++.
* GCC 2.95 has an integrated libstdc++, but does not have an
integrated libg++. Furthermore old libg++ releases will not work
with GCC 2.95. You can retrieve a recent copy of libg++ from the
[1]GCC ftp server.
Note most C++ programs only need libstdc++.
* Exception handling may not work with shared libraries,
particularly on alphas, hppas, rs6000/powerpc and mips based
platforms. Exception handling is known to work on x86 GNU/Linux
platforms with shared libraries.
* In general, GCC 2.95 is more rigorous about rejecting invalid C++
code or deprecated C++ constructs than G++ 2.7, G++ 2.8, EGCS 1.0,
or EGCS 1.1. As a result it may be necessary to fix C++ code
before it will compile with GCC 2.95.
* G++ is also converting toward the ISO C++ standard; as a result
code which was previously valid (and thus accepted by other
compilers and older versions of g++) may no longer be accepted.
The flag -fpermissive may allow some non-conforming code to
compile with GCC 2.95.
* GCC 2.95 compiled C++ code is not binary compatible with EGCS
1.1.x, EGCS 1.0.x or GCC 2.8.x.
* GCC 2.95 does not have changes from the GCC 2.8 tree that were
made between Sept 30, 1998 and April 30, 1999 (the official end of
the GCC 2.8 project). Future GCC releases will include all the
changes from the defunct GCC 2.8 sources.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [2]gnu@gnu.org. There
are also [3]other ways to contact the FSF.
These pages are maintained by [4]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [5]GCC manuals. If that fails, the
[6]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [7]gcc@gnu.org or
[8]gcc@gcc.gnu.org. All of our lists have [9]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [10]Valid XHTML 1.0
References
1. ftp://gcc.gnu.org/pub/gcc/infrastructure/libg++-2.8.1.3.tar.gz
2. mailto:gnu@gnu.org
3. http://www.gnu.org/home.html#ContactInfo
4. http://gcc.gnu.org/about.html
5. http://gcc.gnu.org/onlinedocs/
6. mailto:gcc-help@gcc.gnu.org
7. mailto:gcc@gnu.org
8. mailto:gcc@gcc.gnu.org
9. http://gcc.gnu.org/lists.html
10. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/index.html
EGCS 1.1
September 3, 1998: We are pleased to announce the release of EGCS 1.1.
December 1, 1998: We are pleased to announce the release of EGCS
1.1.1.
March 15, 1999: We are pleased to announce the release of EGCS 1.1.2.
EGCS is a free software project to further the development of the GNU
compilers using an open development environment.
EGCS 1.1 is a major new release of the EGCS compiler system. It has
been [1]extensively tested and is believed to be stable and suitable
for widespread use.
EGCS 1.1 is based on an June 6, 1998 snapshot of the GCC 2.8
development sources; it contains all of the new features found in GCC
2.8.1 as well as all new development from GCC up to June 6, 1998.
EGCS 1.1 also contains many improvements and features not found in GCC
or in older versions of EGCS:
* Global common subexpression elimination and global constant/copy
propagation (aka [2]gcse)
* Ongoing improvements to the [3]alias analysis support to allow for
better optimizations throughout the compiler.
* Vastly improved [4]C++ compiler and integrated C++ runtime
libraries.
* Fixes for the /tmp symlink race security problems.
* New targets including mips16, arm-thumb and 64 bit PowerPC.
* Improvements to GNU Fortran (g77) compiler and runtime library
made since g77 version 0.5.23.
See the [5]new features page for a more complete list of new features
found in EGCS 1.1 releases.
EGCS 1.1.1 is a minor update to fix several serious problems in EGCS
1.1:
* General improvements and fixes
+ Avoid some stack overflows when compiling large functions.
+ Avoid incorrect loop invariant code motions.
+ Fix some core dumps on Linux kernel code.
+ Bring back the imake -Di386 and friends fix from EGCS 1.0.2.
+ Fix code generation problem in gcse.
+ Various documentation related fixes.
* g++/libstdc++ improvements and fixes
+ MT safe EH fix for setjmp/longjmp based exception handling.
+ Fix a few bad interactions between optimization and exception
handling.
+ Fixes for demangling of template names starting with "__".
+ Fix a bug that would fail to run destructors in some cases
with -O2.
+ Fix 'new' of classes with virtual bases.
+ Fix crash building Qt on the Alpha.
+ Fix failure compiling WIFEXITED macro on GNU/Linux.
+ Fix some -frepo failures.
* g77 and libf2c improvements and fixes
+ Various documentation fixes.
+ Avoid compiler crash on RAND intrinsic.
+ Fix minor bugs in makefiles exposed by BSD make programs.
+ Define _XOPEN_SOURCE for libI77 build to avoid potential
problems on some 64-bit systems.
+ Fix problem with implicit endfile on rewind.
+ Fix spurious recursive I/O errors.
* platform specific improvements and fixes
+ Match all versions of UnixWare7.
+ Do not assume x86 SVR4 or UnixWare targets can handle stabs.
+ Fix PPC/RS6000 LEGITIMIZE_ADDRESS macro and bug in conversion
from unsigned ints to double precision floats.
+ Fix ARM ABI issue with NetBSD.
+ Fix a few arm code generation bugs.
+ Fixincludes will fix additional broken SCO OpenServer header
files.
+ Fix a m68k backend bug which caused invalid offsets in reg+d
addresses.
+ Fix problems with 64bit AIX 4.3 support.
+ Fix handling of long longs for varargs/stdarg functions on
the ppc.
+ Minor fixes to CPP predefines for Windows.
+ Fix code generation problems with gpr<->fpr copies for 64bit
ppc.
+ Fix a few coldfire code generation bugs.
+ Fix some more header file problems on SunOS 4.x.
+ Fix assert.h handling for RTEMS.
+ Fix Windows handling of TREE_SYMBOL_REFERENCED.
+ Fix x86 compiler abort in reg-stack pass.
+ Fix cygwin/windows problem with section attributes.
+ Fix Alpha code generation problem exposed by SMP Linux
kernels.
+ Fix typo in m68k 32->64bit integer conversion.
+ Make sure target libraries build with -fPIC for PPC & Alpha
targets.
EGCS 1.1.2 is a minor update to fix several serious problems in EGCS
1.1.1:
* General improvements and fixes
+ Fix bug in loop optimizer which caused the SPARC (and
potentially other) ports to segfault.
+ Fix infinite recursion in alias analysis and combiner code.
+ Fix bug in regclass preferencing.
+ Fix incorrect loop reversal which caused incorrect code to be
generated for several targets.
+ Fix return value for builtin memcpy.
+ Reduce compile time for certain loops which exposed quadratic
behavior in the loop optimizer.
+ Fix bug which caused volatile memory to be written multiple
times when only one write was needed/desired.
+ Fix compiler abort in caller-save.c
+ Fix combiner bug which caused incorrect code generation for
certain division by constant operations.
+ Fix incorrect code generation due to a bug in range check
optimizations.
+ Fix incorrect code generation due to mis-handling of
clobbered values in CSE.
+ Fix compiler abort/segfault due to incorrect register
splitting when unrolling loops.
+ Fix code generation involving autoincremented addresses with
ternary operators.
+ Work around bug in the scheduler which caused qt to be
mis-compiled on some platforms.
+ Fix code generation problems with -fshort-enums.
+ Tighten security for temporary files.
+ Improve compile time for codes which make heavy use of
overloaded functions.
+ Fix multiply defined constructor/destructor symbol problems.
+ Avoid setting bogus RPATH environment variable during
bootstrap.
+ Avoid GNU-make dependencies in the texinfo subdir.
+ Install CPP wrapper script in $(prefix)/bin if --enable-cpp.
--enable-cpp=<dirname> can be used to specify an additional
install directory for the cpp wrapper script.
+ Fix CSE bug which caused incorrect label-label refs to appear
on some platforms.
+ Avoid linking in EH routines from libgcc if they are not
needed.
+ Avoid obscure bug in aliasing code.
+ Fix bug in weak symbol handling.
* Platform-specific improvements and fixes
+ Fix detection of PPro/PII on Unixware 7.
+ Fix compiler segfault when building spec99 and other programs
for SPARC targets.
+ Fix code-generation bugs for integer and floating point
conditional move instructions on the PPro/PII.
+ Use fixincludes to fix byteorder problems on i?86-*-sysv.
+ Fix build failure for the arc port.
+ Fix floating point format configuration for i?86-gnu port.
+ Fix problems with hppa1.0-hp-hpux10.20 configuration when
threads are enabled.
+ Fix coldfire code generation bugs.
+ Fix "unrecognized insn" problems for Alpha and PPC ports.
+ Fix h8/300 code generation problem with floating point values
in memory.
+ Fix unrecognized insn problems for the m68k port.
+ Fix namespace-pollution problem for the x86 port.
+ Fix problems with old assembler on x86 NeXT systems.
+ Fix PIC code-generation problems for the SPARC port.
+ Fix minor bug with LONG_CALLS in PowerPC SVR4 support.
+ Fix minor ISO namespace violation in Alpha varargs/stdarg
support.
+ Fix incorrect "braf" instruction usage for the SH port.
+ Fix minor bug in va-sh which prevented its use with -ansi.
+ Fix problems recognizing and supporting FreeBSD.
+ Handle OpenBSD systems correctly.
+ Minor fixincludes fix for Digital UNIX 4.0B.
+ Fix problems with ctors/dtors in SCO shared libraries.
+ Abort instead of generating incorrect code for PPro/PII
floating point conditional moves.
+ Avoid multiply defined symbols on Linux/GNU systems using
libc-5.4.xx.
+ Fix abort in alpha compiler.
* Fortran-specific fixes
+ Fix the IDate intrinsic (VXT) (in libg2c) so the returned
year is in the documented, non-Y2K-compliant range of 0-99,
instead of being returned as 100 in the year 2000.
+ Fix the `Date_and_Time' intrinsic (in libg2c) to return the
milliseconds value properly in Values(8).
+ Fix the `LStat' intrinsic (in libg2c) to return device-ID
information properly in SArray(7).
Each release includes installation instructions in both HTML and
plaintext forms (see the INSTALL directory in the toplevel directory
of the distribution). However, we also keep the most up to date
[6]installation instructions and [7]build/test status on our web page.
We will update those pages as new information becomes available.
The EGCS project would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc. This [8]amazing
group of volunteers is what makes EGCS successful.
And finally, we can't in good conscience fail to mention some
[9]caveats to using EGCS 1.1.
Download EGCS from egcs.cygnus.com (USA California).
The EGCS 1.1 release is also available on many mirror sites.
[10]Goto mirror list to find a closer site.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There
are also [12]other ways to contact the FSF.
These pages are maintained by [13]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [14]GCC manuals. If that fails, the
[15]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [16]gcc@gnu.org or
[17]gcc@gcc.gnu.org. All of our lists have [18]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [19]Valid XHTML 1.0
References
1. http://gcc.gnu.org/egcs-1.1/egcs-1.1-test.html
2. http://gcc.gnu.org/news/gcse.html
3. http://gcc.gnu.org/news/alias.html
4. http://gcc.gnu.org/egcs-1.1/c++features.html
5. http://gcc.gnu.org/egcs-1.1/features.html
6. http://gcc.gnu.org/install/
7. http://gcc.gnu.org/egcs-1.1/buildstat.html
8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
9. http://gcc.gnu.org/egcs-1.1/caveats.html
10. http://gcc.gnu.org/mirrors.html
11. mailto:gnu@gnu.org
12. http://www.gnu.org/home.html#ContactInfo
13. http://gcc.gnu.org/about.html
14. http://gcc.gnu.org/onlinedocs/
15. mailto:gcc-help@gcc.gnu.org
16. mailto:gcc@gnu.org
17. mailto:gcc@gcc.gnu.org
18. http://gcc.gnu.org/lists.html
19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/features.html
EGCS 1.1 new features
* Integrated GNU Fortran (g77) compiler and runtime library with
improvements, based on [1]g77 version 0.5.23.
* Vast improvements in the C++ compiler; so many they have [2]page
of their own!
* Compiler implements [3]global common subexpression elimination and
global copy/constant propagation.
* More major improvements in the [4]alias analysis code.
* More major improvements in the exception handling code to improve
performance, lower static overhead and provide the infrastructure
for future improvements.
* The infamous /tmp symlink race security problems have been fixed.
* The regmove optimization pass has been nearly completely rewritten
to improve performance of generated code.
* The compiler now recomputes register usage information before
local register allocation. By providing more accurate information
to the priority based allocator, we get better register
allocation.
* The register reloading phase of the compiler optimizes spill code
much better than in previous releases.
* Some bad interactions between the register allocator and
instruction scheduler have been fixed, resulting in much better
code for certain programs. Additionally, we have tuned the
scheduler in various ways to improve performance of generated code
for some architectures.
* The compiler's branch shortening algorithms have been
significantly improved to work better on targets which align jump
targets.
* The compiler now supports -Os to prefer optimizing for code space
over optimizing for code speed.
* The compiler will now totally eliminate library calls which
compute constant values. This primarily helps targets with no
integer div/mul support and targets without floating point
support.
* The compiler now supports an extensive "--help" option.
* cpplib has been greatly improved and may be suitable for limited
use.
* Memory footprint for the compiler has been significantly reduced
for some pathological cases.
* The time to build EGCS has been improved for certain targets
(particularly the alpha and mips platforms).
* Many infrastructure improvements throughout the compiler, plus the
usual mountain of bugfixes and minor improvements.
* Target dependent improvements:
+ SPARC port now includes V8 plus and V9 support as well as
performance tuning for Ultra class machines. The SPARC port
now uses the Haifa scheduler.
+ Alpha port has been tuned for the EV6 processor and has an
optimized expansion of memcpy/bzero. The Alpha port now uses
the Haifa scheduler.
+ RS6000/PowerPC: support for the Power64 architecture and AIX
4.3. The RS6000/PowerPC port now uses the Haifa scheduler.
+ x86: Alignment of static store data and jump targets is per
Intel recommendations now. Various improvements throughout
the x86 port to improve performance on Pentium processors
(including improved epilogue sequences for Pentium chips and
backend improvements which should help register allocation on
all x86 variants. Conditional move support has been fixed and
enabled for PPro processors. The x86 port also better
supports 64bit operations now. Unixware 7, a System V Release
5 target, is now supported and SCO OpenServer targets can
support GAS.
+ MIPS has improved multiply/multiply-add support and now
includes mips16 ISA support.
+ M68k has many micro-optimizations and Coldfire fixes.
* Core compiler is based on the GCC development tree from June 9,
1998, so we have all of the [5]features found in GCC 2.8.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [6]gnu@gnu.org. There
are also [7]other ways to contact the FSF.
These pages are maintained by [8]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [9]GCC manuals. If that fails, the
[10]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [11]gcc@gnu.org or
[12]gcc@gcc.gnu.org. All of our lists have [13]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [14]Valid XHTML 1.0
References
1. http://gcc.gnu.org/onlinedocs/g77/News.html
2. http://gcc.gnu.org/egcs-1.1/c++features.html
3. http://gcc.gnu.org/news/gcse.html
4. http://gcc.gnu.org/news/alias.html
5. http://gcc.gnu.org/egcs-1.0/features-2.8.html
6. mailto:gnu@gnu.org
7. http://www.gnu.org/home.html#ContactInfo
8. http://gcc.gnu.org/about.html
9. http://gcc.gnu.org/onlinedocs/
10. mailto:gcc-help@gcc.gnu.org
11. mailto:gcc@gnu.org
12. mailto:gcc@gcc.gnu.org
13. http://gcc.gnu.org/lists.html
14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/caveats.html
EGCS 1.1 Caveats
* EGCS has an integrated libstdc++, but does not have an integrated
libg++. Furthermore old libg++ releases will not work with EGCS;
HJ Lu has made a libg++-2.8.1.2 snapshot available which may work
with EGCS.
Note most C++ programs only need libstdc++.
* Exception handling may not work with shared libraries,
particularly on alphas, hppas, rs6000/powerpc and mips based
platforms. Exception handling is known to work on x86-linux
platforms with shared libraries.
* Some versions of the Linux kernel have bugs which prevent them
from being compiled or from running when compiled by EGCS. See the
FAQ (as shipped with EGCS 1.1) for additional information.
* In general, EGCS is more rigorous about rejecting invalid C++ code
or deprecated C++ constructs than g++-2.7, g++-2.8 or EGCS 1.0. As
a result it may be necessary to fix C++ code before it will
compile with EGCS.
* G++ is also converting toward the ISO C++ standard; as a result
code which was previously valid (and thus accepted by other
compilers and older versions of g++) may no longer be accepted.
* EGCS 1.1 compiled C++ code is not binary compatible with EGCS
1.0.x or GCC 2.8.x due to changes necessary to support thread safe
exception handling.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [1]gnu@gnu.org. There
are also [2]other ways to contact the FSF.
These pages are maintained by [3]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [4]GCC manuals. If that fails, the
[5]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [6]gcc@gnu.org or
[7]gcc@gcc.gnu.org. All of our lists have [8]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [9]Valid XHTML 1.0
References
1. mailto:gnu@gnu.org
2. http://www.gnu.org/home.html#ContactInfo
3. http://gcc.gnu.org/about.html
4. http://gcc.gnu.org/onlinedocs/
5. mailto:gcc-help@gcc.gnu.org
6. mailto:gcc@gnu.org
7. mailto:gcc@gcc.gnu.org
8. http://gcc.gnu.org/lists.html
9. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.3.html
EGCS 1.0.3
May 15, 1998
We are pleased to announce the release of EGCS 1.0.3.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.0.3 is a minor update to the EGCS 1.0.2 compiler to fix a few
problems reported by Red Hat for builds of Red Hat 5.1.
* Generic bugfixes:
+ Fix a typo in the libio library which resulted in incorrect
behavior of istream::get.
+ Fix the Fortran negative array index problem.
+ Fix a major problem with the ObjC runtime thread support
exposed by glibc2.
+ Reduce memory consumption of the Haifa scheduler.
* Target specific bugfixes:
+ Fix one x86 floating point code generation bug exposed by
glibc2 builds.
+ Fix one x86 internal compiler error exposed by glibc2 builds.
+ Fix profiling bugs on the Alpha.
+ Fix ImageMagick & emacs 20.2 build problems on the Alpha.
+ Fix rs6000/ppc bug when converting values from integer types
to floating point types.
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0.3 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS also contains many improvements and features not found in GCC 2.7
or GCC 2.8.
* Integrated C++ runtime libraries, including support for most major
GNU/Linux systems!
* The integrated libstdc++ library includes a verbatim copy of SGI's
STL release instead of a modified copy.
* Integrated GNU Fortran compiler.
* New instruction scheduler.
* New alias analysis code.
See the [1]new features page for a more complete list of new features
found in EGCS 1.0.x releases.
The EGCS 1.0.3 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0.3 distribution). However, we also keep the
most up to date [2]installation instructions and [3]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [4]caveats to
using EGCS.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS (go.cygnus.com)!
Download EGCS from ftp.cygnus.com (USA California) or go.cygnus.com
(USA California -- High speed link provided by Stanford).
The EGCS 1.0.3 release is also available on many mirror sites.
[5]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [6]gnu@gnu.org. There
are also [7]other ways to contact the FSF.
These pages are maintained by [8]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [9]GCC manuals. If that fails, the
[10]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [11]gcc@gnu.org or
[12]gcc@gcc.gnu.org. All of our lists have [13]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [14]Valid XHTML 1.0
References
1. http://gcc.gnu.org/egcs-1.0/features.html
2. http://gcc.gnu.org/install/
3. http://gcc.gnu.org/egcs-1.0/buildstat.html
4. http://gcc.gnu.org/egcs-1.0/caveats.html
5. http://gcc.gnu.org/mirrors.html
6. mailto:gnu@gnu.org
7. http://www.gnu.org/home.html#ContactInfo
8. http://gcc.gnu.org/about.html
9. http://gcc.gnu.org/onlinedocs/
10. mailto:gcc-help@gcc.gnu.org
11. mailto:gcc@gnu.org
12. mailto:gcc@gcc.gnu.org
13. http://gcc.gnu.org/lists.html
14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.2.html
EGCS 1.0.2
March 16, 1998
We are pleased to announce the release of EGCS 1.0.2.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.0.2 is a minor update to the EGCS 1.0.1 compiler to fix several
serious problems in EGCS 1.0.1.
* General improvements and fixes
+ Memory consumption significantly reduced, especially for
templates and inline functions.
+ Fix various problems with glibc2.1.
+ Fix loop optimization bug exposed by rs6000/ppc port.
+ Fix to avoid potential code generation problems in jump.c.
+ Fix some undefined symbol problems in dwarf1 debug support.
* g++/libstdc++ improvements and fixes
+ libstdc++ in the EGCS release has been updated and should be
link compatible with libstdc++-2.8.
+ Various fixes in libio/libstdc++ to work better on Linux
systems.
+ Fix problems with duplicate symbols on systems that do not
support weak symbols.
+ Memory corruption bug and undefined symbols in bastring have
been fixed.
+ Various exception handling fixes.
+ Fix compiler abort for very long thunk names.
* g77 improvements and fixes
+ Fix compiler crash for omitted bound in Fortran CASE
statement.
+ Add missing entries to g77 lang-options.
+ Fix problem with -fpedantic in the g77 compiler.
+ Fix "backspace" problem with g77 on alphas.
+ Fix x86 backend problem with Fortran literals and -fpic.
+ Fix some of the problems with negative subscripts for g77 on
alphas.
+ Fixes for Fortran builds on cygwin32/mingw32.
* platform specific improvements and fixes
+ Fix long double problems on x86 (exposed by glibc).
+ x86 ports define i386 again to keep imake happy.
+ Fix exception handling support on NetBSD ports.
+ Several changes to collect2 to fix many problems with AIX.
+ Define __ELF__ for rs6000/linux.
+ Fix -mcall-linux problem on rs6000/linux.
+ Fix stdarg/vararg problem for rs6000/linux.
+ Allow autoconf to select a proper install problem on AIX 3.1.
+ m68k port support includes -mcpu32 option as well as cpu32
multilibs.
+ Fix stdarg bug for irix6.
+ Allow EGCS to build on irix5 without the gnu assembler.
+ Fix problem with static linking on sco5.
+ Fix bootstrap on sco5 with native compiler.
+ Fix for abort building newlib on H8 target.
+ Fix fixincludes handling of math.h on SunOS.
+ Minor fix for Motorola 3300 m68k systems.
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0.2 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS also contains many improvements and features not found in GCC 2.7
or GCC 2.8.
* Integrated C++ runtime libraries, including support for most major
linux systems!
* The integrated libstdc++ library includes a verbatim copy of SGI's
STL release.
* Integrated GNU Fortran compiler.
* New instruction scheduler.
* New alias analysis code.
See the [1]new features page for a more complete list of new features
found in EGCS 1.0.x releases.
The EGCS 1.0.2 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0.2 distribution). However, we also keep the
most up to date [2]installation instructions and [3]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [4]caveats to
using EGCS.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS (go.cygnus.com)!
Download EGCS from ftp.cygnus.com (USA California) or go.cygnus.com
(USA California -- High speed link provided by Stanford).
The EGCS 1.0.2 release is also available on many mirror sites.
[5]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [6]gnu@gnu.org. There
are also [7]other ways to contact the FSF.
These pages are maintained by [8]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [9]GCC manuals. If that fails, the
[10]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [11]gcc@gnu.org or
[12]gcc@gcc.gnu.org. All of our lists have [13]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [14]Valid XHTML 1.0
References
1. http://gcc.gnu.org/egcs-1.0/features.html
2. http://gcc.gnu.org/install/index.html
3. http://gcc.gnu.org/egcs-1.0/buildstat.html
4. http://gcc.gnu.org/egcs-1.0/caveats.html
5. http://gcc.gnu.org/mirrors.html
6. mailto:gnu@gnu.org
7. http://www.gnu.org/home.html#ContactInfo
8. http://gcc.gnu.org/about.html
9. http://gcc.gnu.org/onlinedocs/
10. mailto:gcc-help@gcc.gnu.org
11. mailto:gcc@gnu.org
12. mailto:gcc@gcc.gnu.org
13. http://gcc.gnu.org/lists.html
14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.1.html
EGCS 1.0.1
January 6, 1998
We are pleased to announce the release of EGCS 1.0.1.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.0.1 is a minor update to the EGCS 1.0 compiler to fix a few
critical bugs and add support for Red Hat 5.0 Linux. Changes since the
EGCS 1.0 release:
* Add support for Red Hat 5.0 Linux and better support for Linux
systems using glibc2.
Many programs failed to link when compiled with EGCS 1.0 on Red
Hat 5.0 or on systems with newer versions of glibc2. EGCS 1.0.1
should fix these problems.
* Compatibility with both EGCS 1.0 and GCC 2.8 libgcc exception
handling interfaces.
To avoid future compatibility problems, we strongly urge anyone
who is planning on distributing shared libraries that contain C++
code to upgrade to EGCS 1.0.1 first.
Soon after EGCS 1.0 was released, the GCC developers made some
incompatible changes in libgcc's exception handling interfaces.
These changes were needed to solve problems on some platforms.
This means that GCC 2.8.0, when released, will not be seamlessly
compatible with shared libraries built by EGCS 1.0. The reason is
that the libgcc.a in GCC 2.8.0 will not contain a function needed
by the old interface.
The result of this is that there may be compatibility problems
with shared libraries built by EGCS 1.0 when used with GCC 2.8.0.
With EGCS 1.0.1, generated code uses the new (GCC 2.8.0)
interface, and libgcc.a has the support routines for both the old
and the new interfaces (so EGCS 1.0.1 and EGCS 1.0 code can be
freely mixed, and EGCS 1.0.1 and GCC 2.8.0 code can be freely
mixed).
The maintainers of GCC 2.x have decided against including seamless
support for the old interface in 2.8.0, since it was never
"official", so to avoid future compatibility problems we recommend
against distributing any shared libraries built by EGCS 1.0 that
contain C++ code (upgrade to 1.0.1 and use that).
* Various bugfixes in the x86, hppa, mips, and rs6000/ppc backends.
The x86 changes fix code generation errors exposed when building
glibc2 and the Linux dynamic linker (ld.so).
The hppa change fixes a compiler abort when configured for use
with RTEMS.
The MIPS changes fix problems with the definition of LONG_MAX on
newer systems, allow for command line selection of the target ABI,
and fix one code generation problem.
The rs6000/ppc change fixes some problems with passing structures
to varargs/stdarg functions.
* A few machine independent bugfixes, mostly to fix code generation
errors when building Linux kernels or glibc.
* Fix a few critical exception handling and template bugs in the C++
compiler.
* Fix Fortran namelist bug on alphas.
* Fix build problems on x86-solaris systems.
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0.1 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS also contains many improvements and features not found in GCC 2.7
and even the soon to be released GCC 2.8 compilers.
* Integrated C++ runtime libraries, including support for most major
linux systems!
* The integrated libstdc++ library includes a verbatim copy of SGI's
STL release.
* Integrated GNU Fortran compiler
* New instruction scheduler
* New alias analysis code
See the [1]new features page for a more complete list of new features
found in EGCS 1.0.x releases.
The EGCS 1.0.1 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0.1 distribution). However, we also keep the
most up to date [2]installation instructions and [3]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [4]caveats to
using EGCS.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS (go.cygnus.com)!
Download EGCS from ftp.cygnus.com (USA California) or go.cygnus.com
(USA California -- High speed link provided by Stanford).
The EGCS 1.0.1 release is also available on many mirror sites.
[5]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [6]gnu@gnu.org. There
are also [7]other ways to contact the FSF.
These pages are maintained by [8]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [9]GCC manuals. If that fails, the
[10]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [11]gcc@gnu.org or
[12]gcc@gcc.gnu.org. All of our lists have [13]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [14]Valid XHTML 1.0
References
1. http://gcc.gnu.org/egcs-1.0/features.html
2. http://gcc.gnu.org/install/index.html
3. http://gcc.gnu.org/egcs-1.0/buildstat.html
4. http://gcc.gnu.org/egcs-1.0/caveats.html
5. http://gcc.gnu.org/mirrors.html
6. mailto:gnu@gnu.org
7. http://www.gnu.org/home.html#ContactInfo
8. http://gcc.gnu.org/about.html
9. http://gcc.gnu.org/onlinedocs/
10. mailto:gcc-help@gcc.gnu.org
11. mailto:gcc@gnu.org
12. mailto:gcc@gcc.gnu.org
13. http://gcc.gnu.org/lists.html
14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.html
EGCS 1.0
December 3, 1997
We are pleased to announce the release of EGCS 1.0.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
An important goal of EGCS is to allow wide scale testing of
experimental features and optimizations; therefore, EGCS contains some
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS 1.0 also contains many improvements and features not found in GCC
2.7 and even the soon to be released GCC 2.8 compilers.
* Integrated C++ runtime libraries, including support for most major
linux systems!
* The integrated libstdc++ library includes a verbatim copy of SGI's
STL release.
* Integrated GNU Fortran compiler.
* New instruction scheduler.
* New alias analysis code.
See the [1]new features page for a more complete list of new features.
The EGCS 1.0 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0 distribution). However, we also keep the
most up to date [2]installation instructions and [3]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [4]caveats to
using EGCS.
Update: The T1 into our main California offices has been 100%
saturated since shortly after the release. We've added an EGCS 1.0
mirror at our Massachusetts office to help share the load. We also
encourage folks to use the many mirrors available throughout the
world.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS (go.cygnus.com)!
Download EGCS from ftp.cygnus.com (USA California) or go.cygnus.com
(USA California -- High speed link provided by Stanford).
The EGCS 1.0 release should be available on most mirror sites by now.
[5]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [6]gnu@gnu.org. There
are also [7]other ways to contact the FSF.
These pages are maintained by [8]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [9]GCC manuals. If that fails, the
[10]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [11]gcc@gnu.org or
[12]gcc@gcc.gnu.org. All of our lists have [13]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [14]Valid XHTML 1.0
References
1. http://gcc.gnu.org/egcs-1.0/features.html
2. http://gcc.gnu.org/install/index.html
3. http://gcc.gnu.org/egcs-1.0/buildstat.html
4. http://gcc.gnu.org/egcs-1.0/caveats.html
5. http://gcc.gnu.org/mirrors.html
6. mailto:gnu@gnu.org
7. http://www.gnu.org/home.html#ContactInfo
8. http://gcc.gnu.org/about.html
9. http://gcc.gnu.org/onlinedocs/
10. mailto:gcc-help@gcc.gnu.org
11. mailto:gcc@gnu.org
12. mailto:gcc@gcc.gnu.org
13. http://gcc.gnu.org/lists.html
14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/features.html
EGCS 1.0 features
* Core compiler is based on the gcc2 development tree from Aug 2,
1997, so we have most of the [1]features found in GCC 2.8.
* Integrated GNU Fortran compiler based on g77-0.5.22-19970929.
* Vast improvements in the C++ compiler; so many they have [2]page
of their own!
* Integrated C++ runtime libraries, including support for most major
linux systems!
* New instruction scheduler from IBM Haifa which includes support
for function wide instruction scheduling as well as superscalar
scheduling.
* Significantly improved alias analysis code.
* Improved register allocation for two address machines.
* Significant code generation improvements for Fortran code on
Alphas.
* Various optimizations from the g77 project as well as improved
loop optimizations.
* Dwarf2 debug format support for some targets.
* egcs libstdc++ includes the SGI STL implementation without
changes.
* As a result of these and other changes, egcs libstc++ is not
binary compatible with previous releases of libstdc++.
* Various new ports -- UltraSPARC, Irix6.2 & Irix6.3 support, The
SCO Openserver 5 family (5.0.{0,2,4} and Internet FastStart 1.0
and 1.1), Support for RTEMS on several embedded targets, Support
for arm-linux, Mitsubishi M32R, Hitachi H8/S, Matsushita MN102 and
MN103, NEC V850, Sparclet, Solaris & Linux on PowerPCs, etc.
* Integrated testsuites for gcc, g++, g77, libstdc++ and libio.
* RS6000/PowerPC ports generate code which can run on all
RS6000/PowerPC variants by default.
* -mcpu= and -march= switches for the x86 port to allow better
control over how the x86 port generates code.
* Includes the template repository patch (aka repo patch); note the
new template code makes repo obsolete for ELF systems using gnu-ld
such as Linux.
* Plus the usual assortment of bugfixes and improvements.
_________________________________________________________________
Please send FSF & GNU inquiries & questions to [3]gnu@gnu.org. There
are also [4]other ways to contact the FSF.
These pages are maintained by [5]the GCC team.
For questions related to the use of GCC, please consult these web
pages and the [6]GCC manuals. If that fails, the
[7]gcc-help@gcc.gnu.org mailing list might help.
Please send comments on these web pages and the development of GCC
to our developer mailing list at [8]gcc@gnu.org or
[9]gcc@gcc.gnu.org. All of our lists have [10]public archives.
Copyright (C) Free Software Foundation, Inc., 59 Temple Place - Suite
330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted
in any medium, provided this notice is preserved.
Last modified 2004-11-14 [11]Valid XHTML 1.0
References
1. http://gcc.gnu.org/egcs-1.0/features-2.8.html
2. http://gcc.gnu.org/egcs-1.0/c++features.html
3. mailto:gnu@gnu.org
4. http://www.gnu.org/home.html#ContactInfo
5. http://gcc.gnu.org/about.html
6. http://gcc.gnu.org/onlinedocs/
7. mailto:gcc-help@gcc.gnu.org
8. mailto:gcc@gnu.org
9. mailto:gcc@gcc.gnu.org
10. http://gcc.gnu.org/lists.html
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http://gcc.gnu.org/egcs-1.0/caveats.html
EGCS 1.0 Caveats
* EGCS has an integrated libstdc++, but does not have an integrated
libg++. Furthermore old libg++ releases will not work with egc; HJ
Lu has made a libg++-2.8.1.2 available which may work with EGCS.
Note most C++ programs only need libstdc++.
* Note that using -pedantic or -Wreturn-type can cause an explosion
in the amount of memory needed for template-heavy C++ code, such
as code that uses STL. Also note that -Wall includes
-Wreturn-type, so if you use -Wall you will need to specify
-Wno-return-type to turn it off.
* Exception handling may not work with shared libraries,
particularly on alphas, hppas, and mips based platforms. Exception
handling is known to work on x86-linux platforms with shared
libraries.
* Some versions of the Linux kernel have bugs which prevent them
from being compiled or from running when compiled by EGCS. See the
FAQ (as shipped with EGCS 1.0) for additional information.
* In general, EGCS is more rigorous about rejecting invalid C++ code
or deprecated C++ constructs than G++ 2.7. As a result it may be
necessary to fix C++ code before it will compile with EGCS.
* G++ is also aggressively tracking the C++ standard; as a result
code which was previously valid (and thus accepted by other
compilers and older versions of G++) may no longer be accepted.
* EGCS 1.0 may not work with Red Hat Linux 5.0 on all targets. EGCS
1.0.x and later releases should work with Red Hat Linux 5.0.
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References
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