Merge branch 'uli42-pr/libX11_further_backports' into 3.6.x

Attributes GH PR #222: https://github.com/ArcticaProject/nx-libs/pull/222

1 files changed, 65 insertions, 4 deletions

diff --git a/nx-X11/include/Xfuncproto.h b/nx-X11/include/Xfuncproto.h
index 88113c086..7760b6e44 100644
--- a/nx-X11/include/Xfuncproto.h
+++ b/nx-X11/include/Xfuncproto.h
@@ -67,15 +67,15 @@ in this Software without prior written authorization from The Open Group.
 #endif
 #endif /* _XFUNCPROTOBEGIN */
 
+/* Added in X11R6.9, so available in any version of modular xproto */
 #if defined(__GNUC__) && (__GNUC__ >= 4)
 # define _X_SENTINEL(x) __attribute__ ((__sentinel__(x)))
-# define _X_ATTRIBUTE_PRINTF(x,y) __attribute__((__format__(__printf__,x,y)))
 #else
 # define _X_SENTINEL(x)
-# define _X_ATTRIBUTE_PRINTF(x,y)
 #endif /* GNUC >= 4 */
 
-#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 303)
+/* Added in X11R6.9, so available in any version of modular xproto */
+#if defined(__GNUC__) && (__GNUC__ >= 4) && !defined(__CYGWIN__) && !defined(__MINGW32__)
 # define _X_EXPORT      __attribute__((visibility("default")))
 # define _X_HIDDEN      __attribute__((visibility("hidden")))
 # define _X_INTERNAL    __attribute__((visibility("internal")))
@@ -83,18 +83,52 @@ in this Software without prior written authorization from The Open Group.
 # define _X_EXPORT      __global
 # define _X_HIDDEN      __hidden
 # define _X_INTERNAL    __hidden
-#else /* not gcc >= 3.3 and not Sun Studio >= 8 */
+#else /* not gcc >= 4 and not Sun Studio >= 8 */
 # define _X_EXPORT
 # define _X_HIDDEN
 # define _X_INTERNAL
+#endif /* GNUC >= 4 */
+
+/* Branch prediction hints for individual conditionals */
+/* requires xproto >= 7.0.9 */
+#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 303)
+# define _X_LIKELY(x)   __builtin_expect(!!(x), 1)
+# define _X_UNLIKELY(x) __builtin_expect(!!(x), 0)
+#else /* not gcc >= 3.3 */
+# define _X_LIKELY(x)   (x)
+# define _X_UNLIKELY(x) (x)
 #endif
 
+/* Bulk branch prediction hints via marking error path functions as "cold" */
+/* requires xproto >= 7.0.25 */
+#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 403) /* 4.3+ */
+# define _X_COLD __attribute__((__cold__))
+#else
+# define _X_COLD /* nothing */
+#endif
+
+/* Added in X11R6.9, so available in any version of modular xproto */
 #if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 301)
 # define _X_DEPRECATED  __attribute__((deprecated))
 #else /* not gcc >= 3.1 */
 # define _X_DEPRECATED
 #endif
 
+/* requires xproto >= 7.0.17 */
+#if (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)) \
+	|| (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
+# define _X_NORETURN __attribute((noreturn))
+#else
+# define _X_NORETURN
+#endif /* GNUC  */
+
+/* Added in X11R6.9, so available in any version of modular xproto */
+#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 203)
+# define _X_ATTRIBUTE_PRINTF(x,y) __attribute__((__format__(__printf__,x,y)))
+#else /* not gcc >= 2.3 */
+# define _X_ATTRIBUTE_PRINTF(x,y)
+#endif
+
 /* requires xproto >= 7.0.22 */
 #if defined(__GNUC__) &&  ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)
 #define _X_UNUSED  __attribute__((__unused__))
@@ -102,4 +136,31 @@ in this Software without prior written authorization from The Open Group.
 #define _X_UNUSED  /* */
 #endif
 
+/* C99 keyword "inline" or equivalent extensions in pre-C99 compilers */
+/* requires xproto >= 7.0.9
+   (introduced in 7.0.8 but didn't support all compilers until 7.0.9) */
+#if defined(inline) /* assume autoconf set it correctly */ || \
+   (defined(__STDC_VERSION__) && (__STDC_VERSION__ - 0 >= 199901L)) /* C99 */ || \
+   (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550))
+# define _X_INLINE inline
+#elif defined(__GNUC__) && !defined(__STRICT_ANSI__) /* gcc w/C89+extensions */
+# define _X_INLINE __inline__
+#else
+# define _X_INLINE
+#endif
+
+/* C99 keyword "restrict" or equivalent extensions in pre-C99 compilers */
+/* requires xproto >= 7.0.21 */
+#ifndef _X_RESTRICT_KYWD
+# if defined(restrict) /* assume autoconf set it correctly */ || \
+    (defined(__STDC_VERSION__) && (__STDC_VERSION__ - 0 >= 199901L) /* C99 */ \
+     && !defined(__cplusplus)) /* Workaround g++ issue on Solaris */
+#  define _X_RESTRICT_KYWD  restrict
+# elif defined(__GNUC__) && !defined(__STRICT_ANSI__) /* gcc w/C89+extensions */
+#  define _X_RESTRICT_KYWD __restrict__
+# else
+#  define _X_RESTRICT_KYWD
+# endif
+#endif
+
 #endif /* _XFUNCPROTO_H_ */