configure: Fix compiler version check. Closes #286384.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12274 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.in b/configure.in
index 1bca5c4..9a635c2 100644
--- a/configure.in
+++ b/configure.in
@@ -98,18 +98,21 @@
# We don't want gcc < 3.0
AC_MSG_CHECKING([for a supported version of gcc])
-# Try to get the gcc version, sed-ing out some unexpected stuff
-# that appears with the default gcc on OSX 10.6 and 10.7 respectively.
-# Without this, the version number comes out as 686, 10 or 11 :-(
+# Obtain the compiler version.
#
-# i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
-# i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)
+# A few examples of how the ${CC} --version output looks like:
+#
+# Arch Linux: i686-pc-linux-gnu-gcc (GCC) 4.6.2
+# Debian Linux: gcc (Debian 4.3.2-1.1) 4.3.2
+# openSUSE: gcc (SUSE Linux) 4.5.1 20101208 [gcc-4_5-branch revision 167585]
+# Exherbo Linux: x86_64-pc-linux-gnu-gcc (Exherbo gcc-4.6.2) 4.6.2
+# OS/X 10.6: i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
+# OS/X 10.7: i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)
+# Clang: clang version 2.9 (tags/RELEASE_29/final)
#
[gcc_version=`${CC} --version \
- | head -n 1 \
- | $SED 's/i686-apple-darwin10//' \
- | $SED 's/i686-apple-darwin11//' \
- | $SED 's/^[^0-9]*\([0-9.]*\).*$/\1/'`]
+ | $SED -n -e 's/[^ ]*gcc[^ ]* ([^)]*) \([0-9.]*\).*$/\1/p' \
+ -e 's/[^ ]*clang version \([0-9.]*\).*$/\1/p'`]
is_clang="notclang"
if test "x`${CC} --version | head -n 1 | $SED 's/\(clang\) version.*/\1/'`" = "xclang" ; then