--- /dev/null
+#ifndef _MOVIT_DEFS_H
+#define _MOVIT_DEFS_H
+
+// Utility macros that are useful from other heder files.
+
+#ifdef __GNUC__
+#define MUST_CHECK_RESULT __attribute__((warn_unused_result))
+#else
+#define MUST_CHECK_RESULT
+#endif
+
+#endif // !defined(_MOVIT_DEFS_H)