* conf_post.h (__has_attribute): New macro.
(EXTERNALLY_VISIBLE): Use it. This ports to Clang 3.2.
+2012-12-28 Paul Eggert <eggert@cs.ucla.edu>
+
+ Port EXTERNALLY_VISIBLE to Clang 3.2.
+ * conf_post.h (__has_attribute): New macro.
+ (EXTERNALLY_VISIBLE): Use it. This ports to Clang 3.2.
+
2012-12-27 Glenn Morris <rgm@gnu.org>
* cygw32.c (Fcygwin_convert_file_name_to_windows)
#endif
#endif
+#ifndef __has_attribute
+# define __has_attribute(a) 0 /* non-clang */
+#endif
+
/* This silences a few compilation warnings on FreeBSD. */
#ifdef BSD_SYSTEM_AHB
#undef BSD_SYSTEM_AHB
#define NO_INLINE
#endif
-#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
+#if (__clang__ \
+ ? __has_attribute (externally_visible) \
+ : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
#define EXTERNALLY_VISIBLE __attribute__((externally_visible))
#else
#define EXTERNALLY_VISIBLE