1 files changed, 9 insertions, 0 deletions
diff --git a/typedefs.h b/typedefs.h
index e15bb1b3..dc206f29 100644
--- a/typedefs.h
+++ b/typedefs.h
@@ -92,4 +92,13 @@ typedef unsigned __int64    uint64_t;
 #define OVERRIDE
 #endif
 
+// Annotate a function indicating the caller must examine the return value.
+// Use like:
+//   int foo() WARN_UNUSED_RESULT;
+#if defined(__GNUC__)
+#define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
+#else
+#define WARN_UNUSED_RESULT
+#endif
+
 #endif  // WEBRTC_TYPEDEFS_H_