Silence buildbot warnings about unused results

[notmuch] / compat / compat.h

diff --git a/compat/compat.h b/compat/compat.h
index 7767fe84a68580dbd2d2953f99645eda81403cac..b2e27368cf0690701c81b692fc0f9dce4c7216f4 100644 (file)
--- a/compat/compat.h
+++ b/compat/compat.h
@@ -46,6 +46,14 @@ getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp);
 char* strcasestr(const char *haystack, const char *needle);
 #endif /* !HAVE_STRCASESTR */
 
+/* Silence gcc warnings about unused results.  These warnings exist
+ * for a reason; any use of this needs to be justified. */
+#ifdef __GNUC__
+#define IGNORE_RESULT(x) ({ __typeof__(x) __z = (x); (void)(__z = __z); })
+#else /* !__GNUC__ */
+#define IGNORE_RESULT(x) x
+#endif /* __GNUC__ */
+
 #ifdef __cplusplus
 }
 #endif