Fix compilation with GCC 2, which had no __builtin_expect

diff --git a/util-internal.h b/util-internal.h
index 18d6ca75cae3f6a7a9cade32ea240df1b7ac4251..fe9ff3568efbc2631464ced206deff900f8095be 100644 (file)
--- a/util-internal.h
+++ b/util-internal.h
@@ -179,7 +179,7 @@ long _evutil_weakrand(void);
 
 /* Evaluates to the same boolean value as 'p', and hints to the compiler that
  * we expect this value to be false. */
-#ifdef __GNUC__
+#if defined(__GNUC__) && __GNUC__ >= 3         /* gcc 3.0 or later */
 #define EVUTIL_UNLIKELY(p) __builtin_expect(!!(p),0)
 #else
 #define EVUTIL_UNLIKELY(p) (p)