dnl Process this file with autoconf to create configure.
AC_INIT(ltdl.c)
if test -z "$enable_ltdl_install$enable_ltdl_convenience"; then
if test -f ${srcdir}/ltconfig && test -f ${srcdir}/ltmain.sh; then
# if libltdl is libtoolized, it is assumed to be stand-alone and
# installed unless the command line overrides it (tested above)
enable_ltdl_install=yes
else
AC_MSG_WARN([*** The top-level configure must select either])
AC_MSG_WARN([*** [A""C_LIBLTDL_INSTALLABLE] or [A""C_LIBLTDL_CONVENIENCE].])
AC_MSG_ERROR([*** Maybe you want to --enable-ltdl-install?])
fi
fi
AM_INIT_AUTOMAKE(libltdl,1.0,-)
AM_CONFIG_HEADER(config.h)
AM_MAINTAINER_MODE
AC_PROG_CC
AC_C_CONST
AC_C_INLINE
AM_PROG_LIBTOOL
AC_SUBST(LIBTOOL_DEPS)
AC_ARG_ENABLE(ltdl-install,
[ --enable-ltdl-install install libltdl])
AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno)
AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno)
dnl Read the libtool configuration
rm -f conftest
./libtool --config > conftest
. ./conftest
rm -f conftest
AC_CACHE_CHECK([which extension is used for shared libraries],
libltdl_cv_shlibext, [dnl
(
last=
for spec in $library_names_spec; do
last="$spec"
done
changequote(, )
echo "$last" | sed 's/\[.*\]//;s/^[^.]*//;s/\$.*$//;s/\.$//' > conftest
changequote([, ])
)
libltdl_cv_shlibext=`cat conftest`
rm -f conftest
])
if test -n "$libltdl_cv_shlibext"; then
AC_DEFINE_UNQUOTED(LTDL_SHLIB_EXT, "$libltdl_cv_shlibext",
[Define to the extension used for shared libraries, say, ".so". ])
fi
AC_CACHE_CHECK([which variable specifies run-time library path],
libltdl_cv_shlibpath_var, [libltdl_cv_shlibpath_var="$shlibpath_var"])
if test -n "$libltdl_cv_shlibpath_var"; then
AC_DEFINE_UNQUOTED(LTDL_SHLIBPATH_VAR, "$libltdl_cv_shlibpath_var",
[Define to the name of the environment variable that determines the dynamic library search path. ])
fi
AC_CACHE_CHECK([for objdir],
libltdl_cv_objdir, [libltdl_cv_objdir="$objdir"])
test -z "$libltdl_cv_objdir" && libltdl_cv_objdir=".libs"
AC_DEFINE_UNQUOTED(LTDL_OBJDIR, "$libltdl_cv_objdir/",
[Define to the sub-directory in which libtool stores uninstalled libraries. ])
AC_HEADER_STDC
AC_CHECK_HEADERS(malloc.h memory.h stdlib.h stdio.h ctype.h dlfcn.h dl.h dld.h)
AC_CHECK_HEADERS(string.h strings.h, break)
AC_CHECK_FUNCS(strchr index, break)
AC_CHECK_FUNCS(strrchr rindex, break)
AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen],
libltdl_cv_preloaded_symbols, [dnl
if test -n "$global_symbol_pipe"; then
libltdl_cv_preloaded_symbols=yes
else
libltdl_cv_preloaded_symbols=no
fi
])
if test x"$libltdl_cv_preloaded_symbols" = x"yes"; then
AC_DEFINE(HAVE_PRELOADED_SYMBOLS, 1,
[Define if libtool can extract symbol lists from object files. ])
fi
LIBADD_DL=
AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL, 1) LIBADD_DL="-ldl"],
[AC_CHECK_FUNC(dlopen, [AC_DEFINE(HAVE_LIBDL, 1)])])
AC_CHECK_FUNC(shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1)],
[AC_CHECK_LIB(dld, shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1) LIBADD_DL="$LIBADD_DL -ldld"])])
AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD, 1)dnl
test "x$ac_cv_lib_dld_shl_load" = yes || LIBADD_DL="$LIBADD_DL -ldld"])
AC_SUBST(LIBADD_DL)
if test "x$ac_cv_func_dlopen" = xyes || test "x$ac_cv_lib_dl_dlopen" = xyes; then
LIBS_SAVE="$LIBS"
LIBS="$LIBS $LIBADD_DL"
AC_CHECK_FUNCS(dlerror)
LIBS="$LIBS_SAVE"
fi
dnl Check for command to grab the raw symbol name followed
dnl by C symbol name from nm.
AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_REQUIRE([AC_PROG_NM])dnl
# Check for command to grab the raw symbol name followed by C symbol from nm.
AC_MSG_CHECKING([command to parse $NM output])
AC_CACHE_VAL(ac_cv_sys_global_symbol_pipe,
[# These are sane defaults that work on at least a few old systems.
# {They come from Ultrix. What could be older than Ultrix?!! ;)}
changequote(,)dnl
# Character class describing NM global symbol codes.
ac_symcode='[BCDEGRST]'
# Regexp to match symbols that can be accessed directly from C.
ac_sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
# Transform the above into a raw symbol and a C symbol.
ac_symxfrm='\1 \2\3 \3'
# Transform an extracted symbol line into a proper C declaration
ac_global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern char \1;/p'"
# Define system-specific variables.
case "$host_os" in
aix*)
ac_symcode='[BCDT]'
;;
cygwin* | mingw*)
ac_symcode='[ABCDGISTW]'
;;
hpux*)
ac_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern char \1();/p' -e 's/^. .* \(.*\)$/extern char \1;/p'"
;;
irix*)
ac_symcode='[BCDEGRST]'
;;
solaris*)
ac_symcode='[BDT]'
;;
esac
# If we're using GNU nm, then use its standard symbol codes.
if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
ac_symcode='[ABCDGISTW]'
fi
changequote([,])dnl
# Try without a prefix undercore, then with it.
for ac_symprfx in "" "_"; do
ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($ac_symcode\)[ ][ ]*\($ac_symprfx\)$ac_sympat$/$ac_symxfrm/p'"
# Check to see that the pipe works correctly.
ac_pipe_works=no
rm -f conftest.$ac_ext
cat > conftest.$ac_ext <<EOF
#ifdef __cplusplus
extern "C" {
#endif
char nm_test_var;
void nm_test_func(){}
#ifdef __cplusplus
}
#endif
int main(){nm_test_var='a';nm_test_func;return 0;}
EOF
if AC_TRY_EVAL(ac_compile); then
# Now try to grab the symbols.
ac_nlist=conftest.nm
if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
# Try sorting and uniquifying the output.
if sort "$ac_nlist" | uniq > "$ac_nlist"T; then
mv -f "$ac_nlist"T "$ac_nlist"
else
rm -f "$ac_nlist"T
fi
# Make sure that we snagged all the symbols we need.
if egrep ' nm_test_var$' "$ac_nlist" >/dev/null; then
if egrep ' nm_test_func$' "$ac_nlist" >/dev/null; then
cat <<EOF > conftest.c
#ifdef __cplusplus
extern "C" {
#endif
EOF
# Now generate the symbol file.
eval "$ac_global_symbol_to_cdecl"' < "$ac_nlist" >> conftest.c'
cat <<EOF >> conftest.c
#if defined (__STDC__) && __STDC__
# define lt_ptr_t void *
#else
# define lt_ptr_t char *
# define const
#endif
/* The mapping between symbol names and symbols. */
const struct {
const char *name;
lt_ptr_t address;
}
changequote(,)dnl
lt_preloaded_symbols[] =
changequote([,])dnl
{
EOF
sed 's/^. \(.*\) \(.*\)$/ {"\2", (lt_ptr_t) \&\2},/' < "$ac_nlist" >> conftest.c
cat <<\EOF >> conftest.c
{0, (lt_ptr_t) 0}
};
#ifdef __cplusplus
}
#endif
EOF
# Now try linking the two files.
mv conftest.$ac_objext conftstm.$ac_objext
ac_save_LIBS="$LIBS"
ac_save_CFLAGS="$CFLAGS"
LIBS="conftstm.$ac_objext"
CFLAGS="$CFLAGS$no_builtin_flag"
if AC_TRY_EVAL(ac_link) && test -s conftest; then
ac_pipe_works=yes
else
echo "configure: failed program was:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
fi
LIBS="$ac_save_LIBS"
CFLAGS="$ac_save_CFLAGS"
else
echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
fi
else
echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC
fi
else
echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
fi
else
echo "$progname: failed program was:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
fi
rm -rf conftest* conftst*
# Do not use the global_symbol_pipe unless it works.
if test "$ac_pipe_works" = yes; then
if test x"$ac_symprfx" = x"_"; then
ac_cv_sys_symbol_underscore=yes
else
ac_cv_sys_symbol_underscore=no
fi
break
else
ac_cv_sys_global_symbol_pipe=
fi
done
])
ac_result=yes
if test -z "$ac_cv_sys_global_symbol_pipe"; then
ac_result=no
fi
AC_MSG_RESULT($ac_result)
dnl does the compiler prefix global symbols with an underscore?
AC_MSG_CHECKING([for _ prefix in compiled symbols])
AC_CACHE_VAL(ac_cv_sys_symbol_underscore,
[ac_cv_sys_symbol_underscore=no
cat > conftest.$ac_ext <<EOF
void nm_test_func(){}
int main(){nm_test_func;return 0;}
EOF
if AC_TRY_EVAL(ac_compile); then
# Now try to grab the symbols.
ac_nlist=conftest.nm
if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
# See whether the symbols have a leading underscore.
if egrep '^. _nm_test_func' "$ac_nlist" >/dev/null; then
ac_cv_sys_symbol_underscore=yes
else
if egrep '^. nm_test_func ' "$ac_nlist" >/dev/null; then
:
else
echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
fi
fi
else
echo "configure: cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
fi
else
echo "configure: failed program was:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
fi
rm -rf conftest*
])
AC_MSG_RESULT($ac_cv_sys_symbol_underscore)
if test x"$ac_cv_sys_symbol_underscore" = xyes; then
if test x"$ac_cv_func_dlopen" = xyes ||
test x"$ac_cv_lib_dl_dlopen" = xyes ; then
AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
libltdl_cv_need_uscore, [dnl
AC_TRY_RUN([
#if HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#include <stdio.h>
#ifdef RTLD_GLOBAL
# define LTDL_GLOBAL RTLD_GLOBAL
#else
# ifdef DL_GLOBAL
# define LTDL_GLOBAL DL_GLOBAL
# else
# define LTDL_GLOBAL 0
# endif
#endif
/* We may have to define LTDL_LAZY_OR_NOW in the command line if we
find out it does not work in some platform. */
#ifndef LTDL_LAZY_OR_NOW
# ifdef RTLD_LAZY
# define LTDL_LAZY_OR_NOW RTLD_LAZY
# else
# ifdef DL_LAZY
# define LTDL_LAZY_OR_NOW DL_LAZY
# else
# ifdef RTLD_NOW
# define LTDL_LAZY_OR_NOW RTLD_NOW
# else
# ifdef DL_NOW
# define LTDL_LAZY_OR_NOW DL_NOW
# else
# define LTDL_LAZY_OR_NOW 0
# endif
# endif
# endif
# endif
#endif
fnord() { int i=42;}
main() { void *self, *ptr1, *ptr2; self=dlopen(0,LTDL_GLOBAL|LTDL_LAZY_OR_NOW);
if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
if(ptr1 && !ptr2) { dlclose(self); exit(0); } } exit(1); }
], libltdl_cv_need_uscore=no, libltdl_cv_need_uscore=yes,
libltdl_cv_need_uscore=cross
)])
fi
fi
if test x"$libltdl_cv_need_uscore" = xyes; then
AC_DEFINE(NEED_USCORE, 1,
[Define if dlsym() requires a leading underscode in symbol names. ])
fi
dnl Output the makefile
AC_OUTPUT(Makefile)
# Local Variables:
# mode:shell-script
# sh-indentation:2
# End: