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| author | Jakub Jelinek <jakub@redhat.com> | 2011-02-28 16:36:37 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-02-28 16:36:37 +0100 |
| commit | 1b500976241ac4b41d59489cab9fe3a9eccbc734 (patch) | |
| tree | bcf30f81c91016458a27aa522a244c86f6230419 /gcc/configure.ac | |
| parent | 68ade9e4e84617fd5c613618cfdc0cc1fa6d6d81 (diff) | |
| download | gcc-1b500976241ac4b41d59489cab9fe3a9eccbc734.zip gcc-1b500976241ac4b41d59489cab9fe3a9eccbc734.tar.gz gcc-1b500976241ac4b41d59489cab9fe3a9eccbc734.tar.bz2 | |
re PR middle-end/46790 (EH failures in libstdc++ testsuite with --gc-sections and GNU ld 2.18)
PR middle-end/46790
* configure.ac (HAVE_LD_EH_GC_SECTIONS_BUG): New test.
* configure: Regenerated.
* config.in: Regenerated.
* varasm.c (default_function_section): Return NULL
if HAVE_LD_EH_GC_SECTIONS_BUG and decl has implicit
section name.
From-SVN: r170565
Diffstat (limited to 'gcc/configure.ac')
| -rw-r--r-- | gcc/configure.ac | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gcc/configure.ac b/gcc/configure.ac index 0c065e0..03a8cef 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -4097,6 +4097,51 @@ if test x$gcc_cv_ld_eh_gc_sections = xyes; then fi AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections) +AC_MSG_CHECKING(linker EH garbage collection of sections bug) +gcc_cv_ld_eh_gc_sections_bug=no +if test $in_tree_ld = yes ; then + if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \ + && test $in_tree_ld_is_elf = yes; then + gcc_cv_ld_eh_gc_sections_bug=yes + fi +elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x -a x$gcc_cv_as_comdat_group = xyes; then + gcc_cv_ld_eh_gc_sections_bug=yes + cat > conftest.s <<EOF + .section .text +.globl _start + .type _start, @function +_start: + .long foo + .size _start, .-_start + .section .text.startup.foo,"ax",@progbits + .type foo, @function +foo: + .long 0 + .size foo, .-foo + .section .gcc_except_table.foo,"a",@progbits +.L0: + .long 0 + .section .eh_frame,"a",@progbits + .long .L0 +EOF + if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then + if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \ + | grep "gc-sections option ignored" > /dev/null; then + : + elif $gcc_cv_objdump -h conftest 2> /dev/null \ + | grep gcc_except_table > /dev/null; then + gcc_cv_ld_eh_gc_sections_bug=no + fi + fi + rm -f conftest.s conftest.o conftest +fi +if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then + AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1, + [Define if your linker has buggy garbage collection of + sections support when .text.startup.foo like sections are used.]) +fi +AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug) + # -------- # UNSORTED # -------- |