iwmmxt: Don't define dummy _mm_empty for >=gcc-4.8

Definition was not present in <4.8.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=55451

diff --git a/pixman/pixman-mmx.c b/pixman/pixman-mmx.c
index fccba9d63e47545d33156e81d529416e62fa48e7..1e6dbe8aaaa5d19073475cfec4e34abc9bd8fb74 100644 (file)
--- a/pixman/pixman-mmx.c
+++ b/pixman/pixman-mmx.c
@@ -52,7 +52,7 @@
 #define CHECKPOINT()
 #endif
 
-#ifdef USE_ARM_IWMMXT
+#if defined USE_ARM_IWMMXT && __GNUC__ == 4 && __GNUC_MINOR__ < 8
 /* Empty the multimedia state. For some reason, ARM's mmintrin.h doesn't provide this.  */
 extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 _mm_empty (void)