+dnl Copyright (C) 2005, 2006, 2007, 2008, 2011 Free Software Foundation, Inc.
+dnl
+dnl This file is part of GCC.
+dnl
+dnl GCC is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl
+dnl GCC is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with GCC; see the file COPYING3. If not see
+dnl <http://www.gnu.org/licenses/>.
+
dnl See whether we need a declaration for a function.
dnl The result is highly dependent on the INCLUDES passed in, so make sure
dnl to use a different cache variable name in this macro if it is invoked
AC_MSG_ERROR(cannot determine number of bits in a byte)
else
AC_DEFINE_UNQUOTED(CHAR_BIT, $gcc_cv_c_nbby,
- [Define as the number of bits in a byte, if \`limits.h' doesn't.])
+ [Define as the number of bits in a byte, if `limits.h' doesn't.])
fi
fi])
[], [
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
gcc_cv_initfini_array, [dnl
- AC_RUN_IFELSE([AC_LANG_SOURCE([
+ if test "x${build}" = "x${target}" && test "x${build}" = "x${host}"; then
+ case "${target}" in
+ ia64-*)
+ AC_RUN_IFELSE([AC_LANG_SOURCE([
+#ifndef __ELF__
+#error Not an ELF OS
+#endif
+/* We turn on .preinit_array/.init_array/.fini_array support for ia64
+ if it can be used. */
static int x = -1;
int main (void) { return x; }
int foo (void) { x = 0; }
-int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])],
+int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
+])],
[gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
- [gcc_cv_initfini_array=no])])
+ [gcc_cv_initfini_array=no]);;
+ *)
+ gcc_cv_initfini_array=no
+ if test $in_tree_ld = yes ; then
+ if test "$gcc_cv_gld_major_version" -eq 2 \
+ -a "$gcc_cv_gld_minor_version" -ge 22 \
+ -o "$gcc_cv_gld_major_version" -gt 2 \
+ && test $in_tree_ld_is_elf = yes; then
+ gcc_cv_initfini_array=yes
+ fi
+ elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
+ cat > conftest.s <<\EOF
+.section .dtors,"a",%progbits
+.balign 4
+.byte 'A', 'A', 'A', 'A'
+.section .ctors,"a",%progbits
+.balign 4
+.byte 'B', 'B', 'B', 'B'
+.section .fini_array.65530,"a",%progbits
+.balign 4
+.byte 'C', 'C', 'C', 'C'
+.section .init_array.65530,"a",%progbits
+.balign 4
+.byte 'D', 'D', 'D', 'D'
+.section .dtors.64528,"a",%progbits
+.balign 4
+.byte 'E', 'E', 'E', 'E'
+.section .ctors.64528,"a",%progbits
+.balign 4
+.byte 'F', 'F', 'F', 'F'
+.section .fini_array.01005,"a",%progbits
+.balign 4
+.byte 'G', 'G', 'G', 'G'
+.section .init_array.01005,"a",%progbits
+.balign 4
+.byte 'H', 'H', 'H', 'H'
+.text
+EOF
+ if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
+ && $gcc_cv_ld -e 0 -o conftest conftest.o > /dev/null 2>&1 \
+ && $gcc_cv_objdump -s -j .init_array conftest \
+ | grep HHHHFFFFDDDDBBBB > /dev/null 2>&1 \
+ && $gcc_cv_objdump -s -j .fini_array conftest \
+ | grep GGGGEEEECCCCAAAA > /dev/null 2>&1; then
+ gcc_cv_initfini_array=yes
+ fi
+changequote(,)dnl
+ rm -f conftest conftest.*
+changequote([,])dnl
+ fi
+ AC_PREPROC_IFELSE([AC_LANG_SOURCE([
+#ifndef __ELF__
+#error Not an ELF OS
+#endif
+#include <stdlib.h>
+#if defined __GLIBC_PREREQ && __GLIBC_PREREQ (2, 4)
+#else
+#error The C library not known to support .init_array/.fini_array
+#endif
+])],, [gcc_cv_initfini_array=no]);;
+ esac
+ else
+ AC_MSG_CHECKING(cross compile... guessing)
+ gcc_cv_initfini_array=no
+ fi])
enable_initfini_array=$gcc_cv_initfini_array
])
if test $enable_initfini_array = yes; then
ifelse([$1], elf, [_gcc_GAS_VERSION_GTE_IFELSE($@)],
[_gcc_GAS_VERSION_GTE_IFELSE(,$@)])])
+dnl # gcc_GAS_FLAGS
+dnl # Used by gcc_GAS_CHECK_FEATURE
+dnl #
+AC_DEFUN([gcc_GAS_FLAGS],
+[AC_CACHE_CHECK([assembler flags], gcc_cv_as_flags,
+[ case "$target" in
+ i[[34567]]86-*-linux*)
+ dnl Always pass --32 to ia32 Linux assembler.
+ gcc_cv_as_flags="--32"
+ ;;
+ powerpc*-*-darwin*)
+ dnl Always pass -arch ppc to assembler.
+ gcc_cv_as_flags="-arch ppc"
+ ;;
+ *)
+ gcc_cv_as_flags=" "
+ ;;
+ esac])
+])
+
dnl gcc_GAS_CHECK_FEATURE(description, cv, [[elf,]major,minor,patchlevel],
dnl [extra switches to as], [assembler input],
dnl [extra testing logic], [command if feature available])
dnl then it is run instead of simply setting CV to "yes" - it is responsible
dnl for doing so, if appropriate.
AC_DEFUN([gcc_GAS_CHECK_FEATURE],
-[AC_CACHE_CHECK([assembler for $1], [$2],
+[AC_REQUIRE([gcc_GAS_FLAGS])dnl
+AC_CACHE_CHECK([assembler for $1], [$2],
[[$2]=no
ifelse([$3],,,[dnl
if test $in_tree_gas = yes; then
gcc_GAS_VERSION_GTE_IFELSE($3, [[$2]=yes])
el])if test x$gcc_cv_as != x; then
- echo ifelse(m4_substr([$5],0,1),[$], "[$5]", '[$5]') > conftest.s
- if AC_TRY_COMMAND([$gcc_cv_as $4 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD])
+ AS_ECHO([ifelse(m4_substr([$5],0,1),[$], "[$5]", '[$5]')]) > conftest.s
+ if AC_TRY_COMMAND([$gcc_cv_as $gcc_cv_as_flags $4 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD])
then
ifelse([$6],, [$2]=yes, [$6])
else
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