From c8aaf000d90103d91d3314584c569bc0eb74467a Mon Sep 17 00:00:00 2001
From: ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 21 Dec 2006 22:10:30 +0000
Subject: [PATCH] PR other/29639 * configure.ac
(HAVE_LD_EH_GC_SECTIONS): Check that exception tables are kept for
.gnu.linkonce.t sections if COMDAT groups are disabled. * configure:
Regenerate.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@120121 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 7 +++++++
gcc/configure | 36 ++++++++++++++++++++++++++++++++++++
gcc/configure.ac | 36 ++++++++++++++++++++++++++++++++++++
3 files changed, 79 insertions(+)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a6829c9d43b6..a967053b9ea8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2006-12-21 Eric Botcazou <ebotcazou@adacore.com>
+
+ PR other/29639
+ * configure.ac (HAVE_LD_EH_GC_SECTIONS): Check that exception tables
+ are kept for .gnu.linkonce.t sections if COMDAT groups are disabled.
+ * configure: Regenerate.
+
2006-12-21 Joseph Myers <joseph@codesourcery.com>
* rtlanal.c (subreg_get_info): Do not make register size
diff --git a/gcc/configure b/gcc/configure
index 62e489159c3e..09fc0aa6108e 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -16053,10 +16053,46 @@ EOF
gcc_cv_ld_eh_gc_sections=no
elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
gcc_cv_ld_eh_gc_sections=yes
+ # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
+ if test x$gcc_cv_as_comdat_group != xyes; then
+ gcc_cv_ld_eh_gc_sections=no
+ cat > conftest.s <<EOF
+ .section .text
+.globl _start
+ .type _start, @function
+_start:
+ .long foo
+ .size _start, .-_start
+ .section .gnu.linkonce.t.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
+ gcc_cv_ld_eh_gc_sections=no
+ elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+ gcc_cv_ld_eh_gc_sections=yes
+ fi
+ fi
+ fi
fi
fi
rm -f conftest.s conftest.o conftest
fi
+case "$target" in
+ hppa*-*-linux*)
+ # ??? This apparently exposes a binutils bug with PC-relative relocations.
+ gcc_cv_ld_eh_gc_sections=no
+ ;;
+esac
if test x$gcc_cv_ld_eh_gc_sections = xyes; then
cat >>confdefs.h <<\_ACEOF
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 26560cf10a57..706735ee95d9 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -3192,10 +3192,46 @@ EOF
gcc_cv_ld_eh_gc_sections=no
elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
gcc_cv_ld_eh_gc_sections=yes
+ # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
+ if test x$gcc_cv_as_comdat_group != xyes; then
+ gcc_cv_ld_eh_gc_sections=no
+ cat > conftest.s <<EOF
+ .section .text
+.globl _start
+ .type _start, @function
+_start:
+ .long foo
+ .size _start, .-_start
+ .section .gnu.linkonce.t.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
+ gcc_cv_ld_eh_gc_sections=no
+ elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+ gcc_cv_ld_eh_gc_sections=yes
+ fi
+ fi
+ fi
fi
fi
rm -f conftest.s conftest.o conftest
fi
+case "$target" in
+ hppa*-*-linux*)
+ # ??? This apparently exposes a binutils bug with PC-relative relocations.
+ gcc_cv_ld_eh_gc_sections=no
+ ;;
+esac
if test x$gcc_cv_ld_eh_gc_sections = xyes; then
AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
[Define if your linker supports garbage collection of
--
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