AC_DEFUN([AC_FUNC_MMAP_BLACKLIST],
[
AC_CHECK_HEADER([sys/mman.h],
[libffi_header_sys_mman_h=yes], [libffi_header_sys_mman_h=no])
AC_CHECK_FUNC([mmap], [libffi_func_mmap=yes], [libffi_func_mmap=no])
if test "$libffi_header_sys_mman_h" != yes \
|| test "$libffi_func_mmap" != yes; then
ac_cv_func_mmap_file=no
ac_cv_func_mmap_dev_zero=no
ac_cv_func_mmap_anon=no
else
AC_CACHE_CHECK([whether read-only mmap of a plain file works],
ac_cv_func_mmap_file,
[ case "$host_os" in
vms* | ultrix*)
ac_cv_func_mmap_file=no ;;
*)
ac_cv_func_mmap_file=yes;;
esac])
AC_CACHE_CHECK([whether mmap from /dev/zero works],
ac_cv_func_mmap_dev_zero,
[ case "$host_os" in
vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00)
ac_cv_func_mmap_dev_zero=no ;;
*)
ac_cv_func_mmap_dev_zero=yes;;
esac])
AC_CACHE_CHECK([for MAP_ANON(YMOUS)], ac_cv_decl_map_anon,
[AC_TRY_COMPILE(
[
],
[int n = MAP_ANONYMOUS;],
ac_cv_decl_map_anon=yes,
ac_cv_decl_map_anon=no)])
if test $ac_cv_decl_map_anon = no; then
ac_cv_func_mmap_anon=no
else
AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works],
ac_cv_func_mmap_anon,
[ case "$host_os" in
vms* | cygwin* | pe | mingw* | sco* | udk* )
ac_cv_func_mmap_anon=no ;;
*)
ac_cv_func_mmap_anon=yes;;
esac])
fi
fi
if test $ac_cv_func_mmap_file = yes; then
AC_DEFINE(HAVE_MMAP_FILE, 1,
[Define if read-only mmap of a plain file works.])
fi
if test $ac_cv_func_mmap_dev_zero = yes; then
AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1,
[Define if mmap of /dev/zero works.])
fi
if test $ac_cv_func_mmap_anon = yes; then
AC_DEFINE(HAVE_MMAP_ANON, 1,
[Define if mmap with MAP_ANON(YMOUS) works.])
fi
])
m4_define([LIBFFI_ENABLE],[m4_define([_g_switch],[--enable-$1])m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])]) AC_ARG_ENABLE($1,_g_help,
m4_bmatch([$5],
[^permit ],
[[
case "$enableval" in
m4_bpatsubst([$5],[permit ])) ;;
*) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
esac
]],
[^$],
[[
case "$enableval" in
yes|no) ;;
*) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
esac
]],
[[$5]]),
[enable_]m4_bpatsubst([$1],-,_)[=][$2])
m4_undefine([_g_switch])m4_undefine([_g_help])])
AC_DEFUN([LIBFFI_CHECK_LINKER_FEATURES], [
test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
AC_REQUIRE([AC_PROG_LD])
AC_REQUIRE([AC_PROG_AWK])
if test x${with_gnu_ld+set} != xset; then
if test x${ac_cv_prog_gnu_ld+set} != xset; then
with_gnu_ld=no
else
with_gnu_ld=$ac_cv_prog_gnu_ld
fi
fi
libat_ld_is_gold=no
if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
libat_ld_is_gold=yes
fi
changequote(,)
ldver=`$LD --version 2>/dev/null |
sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'`
changequote([,])
libat_gnu_ld_version=`echo $ldver | \
$AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
if test "$with_gnu_ld" = "notbroken"; then
ac_test_CFLAGS="${CFLAGS+set}"
ac_save_CFLAGS="$CFLAGS"
CFLAGS='-x c++ -Wl,--gc-sections'
AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
AC_TRY_RUN([
int main(void)
{
try { throw 1; }
catch (...) { };
return 0;
}
], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
if test "$ac_test_CFLAGS" = set; then
CFLAGS="$ac_save_CFLAGS"
else
CFLAGS=''
fi
if test "$ac_sectionLDflags" = "yes"; then
SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
fi
AC_MSG_RESULT($ac_sectionLDflags)
fi
if test x"$with_gnu_ld" = x"yes"; then
OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
fi
AC_SUBST(SECTION_LDFLAGS)
AC_SUBST(OPT_LDFLAGS)
])
AC_DEFUN([LIBFFI_CHECK_LINKER_FEATURES], [
test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
AC_REQUIRE([AC_PROG_LD])
AC_REQUIRE([AC_PROG_AWK])
if test x${with_gnu_ld+set} != xset; then
if test x${ac_cv_prog_gnu_ld+set} != xset; then
with_gnu_ld=no
else
with_gnu_ld=$ac_cv_prog_gnu_ld
fi
fi
libat_ld_is_gold=no
if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
libat_ld_is_gold=yes
fi
libat_ld_is_lld=no
if $LD --version 2>/dev/null | grep 'LLD '> /dev/null 2>&1; then
libat_ld_is_lld=yes
fi
changequote(,)
ldver=`$LD --version 2>/dev/null |
sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'`
changequote([,])
libat_gnu_ld_version=`echo $ldver | \
$AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
if test "$with_gnu_ld" = "notbroken"; then
ac_test_CFLAGS="${CFLAGS+set}"
ac_save_CFLAGS="$CFLAGS"
CFLAGS='-x c++ -Wl,--gc-sections'
AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
AC_TRY_RUN([
int main(void)
{
try { throw 1; }
catch (...) { };
return 0;
}
], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
if test "$ac_test_CFLAGS" = set; then
CFLAGS="$ac_save_CFLAGS"
else
CFLAGS=''
fi
if test "$ac_sectionLDflags" = "yes"; then
SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
fi
AC_MSG_RESULT($ac_sectionLDflags)
fi
if test x"$with_gnu_ld" = x"yes"; then
OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
fi
AC_SUBST(SECTION_LDFLAGS)
AC_SUBST(OPT_LDFLAGS)
])
AC_DEFUN([LIBFFI_ENABLE_SYMVERS], [
LIBFFI_ENABLE(symvers,yes,[=STYLE],
[enables symbol versioning of the shared library],
[permit yes|no|gnu*|sun])
AC_REQUIRE([LIBFFI_CHECK_LINKER_FEATURES])
if test x$enable_symvers = xyes ; then
if test $enable_shared = no || test "x$LD" = x; then
enable_symvers=no
else
if test $with_gnu_ld = yes ; then
enable_symvers=gnu
else
case ${target_os} in
solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
enable_symvers=sun ;;
*)
enable_symvers=no ;;
esac
fi
fi
fi
if test x$enable_symvers = xsun ; then
case ${target_os} in
solaris2*)
;;
*)
AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
AC_MSG_WARN([=== you are not targetting Solaris 2.])
AC_MSG_WARN([=== Symbol versioning will be disabled.])
enable_symvers=no
;;
esac
fi
if test $enable_symvers != no; then
AC_MSG_CHECKING([for shared libgcc])
ac_save_CFLAGS="$CFLAGS"
CFLAGS=' -lgcc_s'
AC_TRY_LINK(, [return 0;], libat_shared_libgcc=yes, libat_shared_libgcc=no)
CFLAGS="$ac_save_CFLAGS"
if test $libat_shared_libgcc = no; then
cat > conftest.c <<EOF
int main (void) { return 0; }
EOF
changequote(,) libat_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
-shared -shared-libgcc -o conftest.so \
conftest.c -v 2>&1 >/dev/null \
| sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
changequote([,]) rm -f conftest.c conftest.so
if test x${libat_libgcc_s_suffix+set} = xset; then
CFLAGS=" -lgcc_s$libat_libgcc_s_suffix"
AC_TRY_LINK(, [return 0;], libat_shared_libgcc=yes)
CFLAGS="$ac_save_CFLAGS"
fi
fi
AC_MSG_RESULT($libat_shared_libgcc)
fi
libat_min_gnu_ld_version=21400
if test $enable_symvers != no && test $libat_shared_libgcc = yes; then
if test $with_gnu_ld = yes; then
if test $libat_gnu_ld_version -ge $libat_min_gnu_ld_version ; then
enable_symvers=gnu
elif test $libat_ld_is_gold = yes ; then
enable_symvers=gnu
elif test $libat_ld_is_lld = yes ; then
enable_symvers=gnu
else
AC_MSG_WARN(=== Linker version $libat_gnu_ld_version is too old for)
AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
AC_MSG_WARN(=== You would need to upgrade your binutils to version)
AC_MSG_WARN(=== $libat_min_gnu_ld_version or later and rebuild GCC.)
if test $libat_gnu_ld_version -ge 21200 ; then
AC_MSG_WARN([=== Symbol versioning will be disabled.])
enable_symvers=no
else
AC_MSG_WARN([=== Symbol versioning will be disabled.])
enable_symvers=no
fi
fi
elif test $enable_symvers = sun; then
: All interesting versions of Sun ld support sun style symbol versioning.
else
AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
AC_MSG_WARN([=== either you are not using a supported linker, or you are])
AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
AC_MSG_WARN([=== Symbol versioning will be disabled.])
enable_symvers=no
fi
fi
if test $enable_symvers = gnu; then
AC_DEFINE(LIBFFI_GNU_SYMBOL_VERSIONING, 1,
[Define to 1 if GNU symbol versioning is used for libatomic.])
fi
AM_CONDITIONAL(LIBFFI_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
AM_CONDITIONAL(LIBFFI_BUILD_VERSIONED_SHLIB_GNU, test $enable_symvers = gnu)
AM_CONDITIONAL(LIBFFI_BUILD_VERSIONED_SHLIB_SUN, test $enable_symvers = sun)
AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
])