configure.ac | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
New commits:
commit 5f27719e4e501506b82bf095aa1b2b1aac5eb390
Author: Miklos Vajna <vmik...@suse.cz>
Date: Wed Jan 30 21:04:28 2013 +0100
configure: better libstdc++ ABI breakage check
The old code expected that gcc -dumpversion outputs x.y.z, but just x.y
is also a valid output. Use the preprocessor defines instead, this way
SUSE 4.7.2 gcc will use -std=gnu++0x as well.
Change-Id: I9871b05953ab255c66dd152c0befd29037522902
diff --git a/configure.ac b/configure.ac
index eb0a434..e49cc38 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5558,10 +5558,17 @@ if test "$GCC" = "yes"; then
AC_MSG_RESULT([no])
fi
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#if __GNUC__ == 4 && __GNUC_MINOR__ == 7 && (__GNUC_PATCHLEVEL__ == 0 ||
__GNUC_PATCHLEVEL__ == 1)
+#else
+abi ok
+#endif
+]])],[HAVE_BROKEN_ABI=TRUE],[HAVE_BROKEN_ABI=FALSE])
+
AC_MSG_CHECKING([whether $CXX supports C++11 without Language Defect 757])
# This should check libstdc++ version, not gcc, but clang has incidentally
C++11 support
# disabled in this case by the __float128 case below.
- if test "$GCCVER" -ge 040700 -a "$GCCVER" -lt 040702; then
+ if test "$HAVE_BROKEN_ABI" = "TRUE"; then
AC_MSG_NOTICE([Not using -std=gnu++0x on $CXX version 4.7.0/4.7.1 due
to libstdc++ ABI breakage.])
else
save_CXXFLAGS=$CXXFLAGS
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