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configure.ac: Adjust CFI test to test assembler directly rather than checking gcc...

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* configure.ac: Adjust CFI test to test assembler directly rather
	than checking gcc preprocessor macro.
	* configure: Rebuild.

From-SVN: r164713
This commit is contained in:
Ian Lance Taylor 2010-09-29 00:54:08 +00:00 committed by Ian Lance Taylor
parent f6a0745f17
commit 6dace308de
3 changed files with 19 additions and 4 deletions
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6
libgcc/ChangeLog
View File

@ -1,3 +1,9 @@
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.
2010-09-27 Ian Lance Taylor <iant@google.com>
* configure.ac: Test whether assembler supports CFI directives.

6
libgcc/configure vendored
View File

@ -3715,7 +3715,11 @@ if test "${libgcc_cv_cfi+set}" = set; then :
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int i = __GCC_HAVE_DWARF2_CFI_ASM;
asm("\n\
.text\n\
.cfi_startproc\n\
.cfi_personality 0, symbol\n\
.cfi_endproc");
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
libgcc_cv_cfi=yes

11
libgcc/configure.ac
View File

@ -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