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-rw-r--r--configure.ac5
1 files changed, 3 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac
index 0fd8c1e4..2e7f97b2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -588,8 +588,9 @@ if test "$GCC" = yes ; then
do
AC_MSG_CHECKING([if $CC accepts $NEW_FLAG])
OLD_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $NEW_FLAG"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([void foo(void) { }])], [
+ CFLAGS="$CFLAGS $NEW_FLAG -Werror"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE(
+ [void foo(void); void foo(void) { }])], [
AM_CFLAGS="$AM_CFLAGS $NEW_FLAG"
AC_MSG_RESULT([yes])
], [