bpo-36618: Don't add -fmax-type-align flag to old clang (GH-12811)
diff --git a/configure b/configure
index ac1e66a..9c7eded 100755
--- a/configure
+++ b/configure
@@ -6889,9 +6889,14 @@
# instead: slower but don't trigger a SIGSEGV if the memory is not aligned
# on 16 bytes.
#
- # Sadly, the flag must be expected to CFLAGS and not just CFLAGS_NODIST,
+ # Sadly, the flag must be added to CFLAGS and not just CFLAGS_NODIST,
# since third party C extensions can have the same issue.
- CFLAGS="$CFLAGS -fmax-type-align=8"
+ #
+ # Check if -fmax-type-align flag is supported (it's not supported by old
+ # clang versions):
+ if "$CC" -v --help 2>/dev/null |grep -- -fmax-type-align > /dev/null; then
+ CFLAGS="$CFLAGS -fmax-type-align=8"
+ fi
fi