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-rw-r--r--include/features.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/features.h b/include/features.h
index 880cd36ef..54330dae9 100644
--- a/include/features.h
+++ b/include/features.h
@@ -26,6 +26,20 @@
#define __attribute(foo) /* Ignore */
#endif
+/* Convenience macro to test the version of gcc.
+ * Use it like this:
+ * #if __GNUC_PREREQ (2,8)
+ * ... code requiring gcc 2.8 or later ...
+ * #endif
+ * Note - they won't work for gcc1, since the _MINOR macros
+ * were not defined then. */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+#define __GNUC_PREREQ(maj, min) \
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#else
+#define __GNUC_PREREQ(maj,min) 0
+#endif
+
/* __restrict is known in EGCS 1.2 and above. */
#if !defined __GNUC__ || __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 92)
# define __restrict /* Ignore */