--- gcc/config/i386/xmmintrin.h.orig	2013-01-18 14:57:27.762645582 +0100
+++ gcc/config/i386/xmmintrin.h	2013-01-18 14:58:27.604561940 +0100
@@ -37,6 +37,10 @@
 /* Get _mm_malloc () and _mm_free ().  */
 #include <mm_malloc.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* The Intel API is flexible enough that we must allow aliasing with other
    vector types, and their scalar components.  */
 typedef float __m128 __attribute__ ((__vector_size__ (16), __may_alias__));
@@ -1241,6 +1245,10 @@
   (row3) = __builtin_ia32_movhlps (__t3, __t2);				\
 } while (0)
 
+#ifdef __cplusplus
+}
+#endif
+
 /* For backward source compatibility.  */
 #ifdef __SSE2__
 # include <emmintrin.h>