From dc0c9b5e4d2e037325fce6bae762ae2eed77ebec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim=20R=C3=BChsen?= <address@hidden>
Date: Wed, 3 Jan 2018 11:50:07 +0100
Subject: [PATCH] Fix -Wundef in user-included header lib/cdef.h

* lib/cdefs.h: Check if defined before using __USE_FORTIFY_LEVEL
---
 lib/cdefs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/cdefs.h b/lib/cdefs.h
index 9ed0259dc..f6c20fe2e 100644
--- a/lib/cdefs.h
+++ b/lib/cdefs.h
@@ -295,7 +295,7 @@
 #if __GNUC_PREREQ (3,4)
 # define __attribute_warn_unused_result__ \
    __attribute__ ((__warn_unused_result__))
-# if __USE_FORTIFY_LEVEL > 0
+# if defined __USE_FORTIFY_LEVEL && __USE_FORTIFY_LEVEL > 0
 #  define __wur __attribute_warn_unused_result__
 # endif
 #else
-- 
2.15.1