xnu-517.12.7.tar.gz

[apple/xnu.git] / bsd / sys / cdefs.h

diff --git a/bsd/sys/cdefs.h b/bsd/sys/cdefs.h
index 5622154f3f9f63313a5de302d96ba925036a619d..3ec2547df09ca6be0c0a6d103529290c742056ba 100644 (file)
--- a/bsd/sys/cdefs.h
+++ b/bsd/sys/cdefs.h
@@ -128,10 +128,20 @@
  * these work for GNU C++ (modulo a slight glitch in the C++ grammar
  * in the distribution version of 2.5.5).
  */
-#if !defined(__GNUC__) || __GNUC__ < 2 || \
-       (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
+#if defined(__MWERKS__) && (__MWERKS__ > 0x2400)
+       /* newer Metrowerks compilers support __attribute__() */
+#elif __GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 5
+#define        __dead2         __attribute__((__noreturn__))
+#define        __pure2         __attribute__((__const__))
+#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
+#define        __unused        /* no attribute */
+#else
+#define        __unused        __attribute__((__unused__))
+#endif
+#else
 #define        __attribute__(x)        /* delete __attribute__ if non-gcc or gcc1 */
 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
+/* __dead and __pure are depreciated.  Use __dead2 and __pure2 instead */
 #define        __dead          __volatile
 #define        __pure          __const
 #endif
@@ -142,9 +152,13 @@
 #define        __dead
 #define        __pure
 #endif
+#ifndef __dead2
+#define        __dead2
+#define        __pure2
+#define        __unused
+#endif
 
-#define __IDSTRING(name,string) \
-     static const char name[] __attribute__((__unused__)) = string
+#define __IDSTRING(name,string) static const char name[] __unused = string
 
 #ifndef __COPYRIGHT
 #define __COPYRIGHT(s) __IDSTRING(copyright,s)