Fix Handling of visibility attribute with older gccs

[Andreas Jaeger]

With GCC 2.95.3 I get these warnings when compiling glibc from CVS:
itoa-digits.c:23: warning: `visibility' attribute directive ignored

Ok to commit the appended patch?

Andreas

2002-03-16  Andreas Jaeger  <aj@suse.de>

	* include/libc-symbols.h (_INTVARDEF): Define variant when
	visibility attribute is not supported.

============================================================
Index: include/libc-symbols.h
--- include/libc-symbols.h	2002/03/14 00:46:29	1.32
+++ include/libc-symbols.h	2002/03/16 19:53:40
@@ -362,9 +362,14 @@
 # define INTDEF(name) strong_alias (name, name##_internal)
 # define INTVARDEF(name) \
   _INTVARDEF (name, name##_internal)
-# define _INTVARDEF(name, aliasname) \
+# if defined HAVE_VISIBILITY_ATTRIBUTE
+#  define _INTVARDEF(name, aliasname) \
   extern __typeof (name) aliasname __attribute__ ((alias (#name), \
 						   visibility ("hidden")));
+# else
+#  define _INTVARDEF(name, aliasname) \
+  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
+# endif
 # define INTDEF2(name, newname) strong_alias (name, newname##_internal)
 # define INTVARDEF2(name, newname) _INTVARDEF (name, newname##_internal)
 #else

-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj