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-rw-r--r--misc/sys/cdefs.h20
1 files changed, 14 insertions, 6 deletions
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index ab7d327c59..bacfe2f63f 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -281,13 +281,21 @@
/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
inline semantics, unless -fgnu89-inline is used. */
-#ifdef __GNUC_STDC_INLINE__
-# define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
-# define __extern_always_inline \
+#if !defined __cplusplus || __GNUC_PREREQ (4,3)
+# if defined __GNUC_STDC_INLINE__ || defined __cplusplus
+# define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
+# define __extern_always_inline \
extern __always_inline __attribute__ ((__gnu_inline__))
-#else
-# define __extern_inline extern __inline
-# define __extern_always_inline extern __always_inline
+# else
+# define __extern_inline extern __inline
+# define __extern_always_inline extern __always_inline
+# endif
+#endif
+
+/* GCC 4.3 and above allow passing all anonymous arguments of an
+ __extern_always_inline function to some other vararg function. */
+#if __GNUC_PREREQ (4,3)
+# define __va_arg_pack() __builtin_va_arg_pack ()
#endif
/* It is possible to compile containing GCC extensions even if GCC is