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-rw-r--r--m4/curl-compilers.m45
1 files changed, 5 insertions, 0 deletions
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index 589032446..673f64097 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -881,6 +881,11 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
if test "$compiler_num" -ge "101"; then
tmp_CFLAGS="$tmp_CFLAGS -Wunused"
fi
+ #
+ dnl Only clang 2.9 or later
+ if test "$compiler_num" -ge "209"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wshift-sign-overflow"
+ fi
fi
;;
#