re PR libgcc/64885 (libstdc++ all_attributes failure)

	PR libgcc/64885
	* gthr-single.h: Use __unused__ attribute instead of unused.
	* config/gthr-vxworks.h: Likewise.
	* config/i386/gthr-win32.h: Likewise.

From-SVN: r221120

libgcc/ChangeLog

+2015-02-12  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libgcc/64885
+	* gthr-single.h: Use __unused__ attribute instead of unused.
+	* config/gthr-vxworks.h: Likewise.
+	* config/i386/gthr-win32.h: Likewise.
+
 2015-02-27  Kai Tietz  <ktietz@redhat.com>
 
 	PR target/65038

libgcc/config/gthr-vxworks.h

@@ -36,7 +36,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #ifdef __cplusplus
 #define UNUSED(x)
 #else
-#define UNUSED(x) x __attribute__((unused))
+#define UNUSED(x) x __attribute__((__unused__))
 #endif
 
 #ifdef __cplusplus

libgcc/config/i386/gthr-win32.h

@@ -583,7 +583,7 @@ __gthread_once (__gthread_once_t *__once, void (*__func) (void))
    C++ EH. Mingw uses a thread-support DLL to work-around this problem.  */
 static inline int
 __gthread_key_create (__gthread_key_t *__key,
-		      void (*__dtor) (void *) __attribute__((unused)))
+		      void (*__dtor) (void *) __attribute__((__unused__)))
 {
   int __status = 0;
   DWORD __tls_index = TlsAlloc ();

libgcc/gthr-single.h

@@ -38,7 +38,7 @@ typedef int __gthread_recursive_mutex_t;
 #define __GTHREAD_MUTEX_INIT_FUNCTION(mx)
 #define __GTHREAD_RECURSIVE_MUTEX_INIT 0
 
-#define UNUSED __attribute__((unused))
+#define UNUSED __attribute__((__unused__))
 
 #ifdef _LIBOBJC