Non-null function argument declaration

diff --git a/lib/birdlib.h b/lib/birdlib.h
index 4adc42cdbd0b6c797c0f3b4c2f2ae0abd2cab6ba..caa26b9421b9b6819161aee366d68a79fc76a652 100644 (file)
--- a/lib/birdlib.h
+++ b/lib/birdlib.h
@@ -72,6 +72,7 @@ static inline int u64_cmp(u64 i1, u64 i2)
 #define NORET __attribute__((noreturn))
 #define UNUSED __attribute__((unused))
 #define PACKED __attribute__((packed))
+#define NONNULL(...) __attribute__((nonnull((__VA_ARGS__))))
 
 #ifndef HAVE_THREAD_LOCAL
 #define _Thread_local