Disable Uninitialized Use Warnings for Broken gcc Versions
Some versions of gcc accept unsupported -W flags and run just fine if
there are no warnings, but die with an unsupported flag error if a
warning is encountered. gcc 4.3 and gcc 4.4 both exhibit this
behavior for -Wno-maybe-uninitialized. Therefore, if the flag check
for -Wno-maybe-uninitialized succeeds, only use
-Wno-maybe-uninitialized if we are using gcc version 4.7 or greater.
Use -Wno-uninitialized otherwise.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172543 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/configure b/configure
index 95bf610..d468759 100755
--- a/configure
+++ b/configure
@@ -12257,7 +12257,19 @@
NO_UNINITIALIZED=`$CXX -Werror -Wno-uninitialized -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wno-uninitialized`
else
- NO_UNINITIALIZED=
+ gxx_version=`$CXX -dumpversion`
+ gxx_version_major=`echo $gxx_version | cut -d'.' -f1`
+ gxx_version_minor=`echo $gxx_version | cut -d'.' -f2`
+ gxx_version_patch=`echo $gxx_version | cut -d'.' -f3`
+
+ if test "$gxx_version_major" -ge "4" \
+ && test "$gxx_version_minor" -ge "7"; then
+ NO_UNINITIALIZED=
+ else
+ NO_MAYBE_UNINITIALIZED=
+ NO_UNINITIALIZED=`$CXX -Werror -Wno-uninitialized -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wno-uninitialized`
+
+ fi
fi
else
NO_UNINITIALIZED=