From f5f2cb87705e7d8c78dd4b5bf5ebce69de9c1d0b Mon Sep 17 00:00:00 2001
From: Ruben Kerkhof <ruben@rubenkerkhof.com>
Date: Tue, 27 Jan 2015 20:33:30 +0100
Subject: [PATCH] Make sure Clang reports warnings as errors in test

---
 m4/pdns_pie.m4 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/m4/pdns_pie.m4 b/m4/pdns_pie.m4
index 9d64e48a79..ef41be5472 100644
--- a/m4/pdns_pie.m4
+++ b/m4/pdns_pie.m4
@@ -19,6 +19,7 @@ dnl <http://www.gnu.org/licenses/>.
 dnl
 
 AC_DEFUN([AC_CC_PIE],[
+    AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
     PIE_CFLAGS=
     PIE_LDFLAGS=
     case "$host" in
-- 
2.47.2