--- a/gcc/config/i386/fma4intrin.h	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config/i386/fma4intrin.h	Fri Oct 27 22:46:09 2017 +0900
@@ -1,4 +1,4 @@
-/* Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2007-2017 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -28,13 +28,15 @@
 #ifndef _FMA4INTRIN_H_INCLUDED
 #define _FMA4INTRIN_H_INCLUDED
 
-#ifndef __FMA4__
-# error "FMA4 instruction set not enabled"
-#else
-
 /* We need definitions from the SSE4A, SSE3, SSE2 and SSE header files.  */
 #include <ammintrin.h>
 
+#ifndef __FMA4__
+#pragma GCC push_options
+#pragma GCC target("fma4")
+#define __DISABLE_FMA4__
+#endif /* __FMA4__ */
+
 /* 128b Floating point multiply/add type instructions.  */
 extern __inline __m128 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 _mm_macc_ps (__m128 __A, __m128 __B, __m128 __C)
@@ -231,6 +233,9 @@
   return (__m256d) __builtin_ia32_vfmaddsubpd256 ((__v4df)__A, (__v4df)__B, -(__v4df)__C);
 }
 
-#endif
+#ifdef __DISABLE_FMA4__
+#undef __DISABLE_FMA4__
+#pragma GCC pop_options
+#endif /* __DISABLE_FMA4__ */
 
 #endif