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

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a6829c9..a967053 100644 (file)
--- 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 62e4891..09fc0aa 100755 (executable)
--- 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 26560cf..706735e 100644 (file)
--- 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