xmalloc: Add attribute warn_unused_result to allocation functions

Add the warn_unused_result GCC function attribute to all allocation
functions in xmalloc.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 5 insertions, 1 deletions

diff --git a/built_in.h b/built_in.h
index 8e1ba0d..6ebf27e 100644
--- a/built_in.h
+++ b/built_in.h
@@ -73,7 +73,11 @@ typedef uint8_t		u8;
 #endif
 
 #ifndef __maybe_unused
-# define __maybe_unused		__attribute__ ((__unused__))
+# define __maybe_unused		__attribute__((__unused__))
+#endif
+
+#ifndef __warn_unused_result
+# define __warn_unused_result	__attribute__((warn_unused_result))
 #endif
 
 #ifndef noinline