Import change from ctype.h revision 1.20 from openbsd
Fixes builds with gcc >= 4.3 with -std=gnu99
Change-Id: I8729b7f4237fd7a99a82b2fe60573a7afe66b435
diff --git a/libc/include/ctype.h b/libc/include/ctype.h
index b5f9ff4..58b76ea 100644
--- a/libc/include/ctype.h
+++ b/libc/include/ctype.h
@@ -59,7 +59,11 @@
/* extern __inline is a GNU C extension */
#ifdef __GNUC__
+# if defined(__GNUC_STDC_INLINE__)
+#define __CTYPE_INLINE extern __inline __attribute__((__gnu_inline__))
+# else
#define __CTYPE_INLINE extern __inline
+# endif
#else
#define __CTYPE_INLINE static __inline
#endif