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PATCH COMMITTED: Try again to get libgcc -fsplit-stack in sync
- From: Ian Lance Taylor <iant at google dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Tue, 28 Sep 2010 17:55:01 -0700
- Subject: PATCH COMMITTED: Try again to get libgcc -fsplit-stack in sync
This is another attempt to get the libgcc build in sync with gcc with
respect to -fsplit-stack. This changes the test in the libgcc configure
script to match the test done in ix86_supports_split_stack.
Bootstrapped on x86_64-unknown-linux-gnu. Committed to mainline.
Ian
2010-09-28 Ian Lance Taylor <iant@google.com>
* configure.ac: Adjust CFI test to test assembler directly rather
than checking gcc preprocessor macro.
* configure: Rebuild.
Index: configure.ac
===================================================================
--- configure.ac (revision 164696)
+++ configure.ac (working copy)
@@ -137,9 +137,14 @@ AC_SUBST(fixed_point)
# Check for assembler CFI support.
AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
- [AC_COMPILE_IFELSE([int i = __GCC_HAVE_DWARF2_CFI_ASM;],
- [libgcc_cv_cfi=yes],
- [libgcc_cv_cfi=no])])
+ [AC_COMPILE_IFELSE(
+[asm("\n\
+ .text\n\
+ .cfi_startproc\n\
+ .cfi_personality 0, symbol\n\
+ .cfi_endproc");],
+ [libgcc_cv_cfi=yes],
+ [libgcc_cv_cfi=no])])
# Check 32bit or 64bit for x86.
case ${host} in