Restrict use of alloc_size function attribute to gcc >= 4.3.0.

It's not supported by gcc 4.2.4.  CHECK_PRINTF doesn't work
perfectly with gcc 4.2.1, so disable that with gcc < 4.3.0 as
well. Fix to commit c066b395274021182a5f0530ccfeb1bcd167d860.

diff --git a/h/mh.h b/h/mh.h
index 2723a42..6b4466b 100644 (file)
--- a/h/mh.h
+++ b/h/mh.h
@@ -40,9 +40,14 @@ typedef unsigned char  boolean;  /* not int so we can pack in a structure */
 /* If we're using gcc then tell it extra information so it can do more
  * compile-time checks. */
 #if __GNUC__ > 2
-#define NORETURN __attribute__((__noreturn__))
-#define CHECK_PRINTF(fmt, arg) __attribute__((format(printf, fmt, arg)))
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 #define ALLOC_SIZE(...) __attribute__((alloc_size(__VA_ARGS__)))
+#define CHECK_PRINTF(fmt, arg) __attribute__((format(printf, fmt, arg)))
+#else  /* gcc < 4.3.0 */
+#define ALLOC_SIZE(...)
+#define CHECK_PRINTF(fmt, arg)
+#endif /* gcc < 4.3.0 */
+#define NORETURN __attribute__((__noreturn__))
 #define CONST __attribute__((const))
 #define MALLOC __attribute__((malloc))
 #define NONNULL(...) __attribute__((nonnull(__VA_ARGS__)))