re PR driver/66737 (ld: warning: -z bndplt ignored)

	PR driver/66737
	* config/i386/linux-common.h (MPX_SPEC): Use linker option
	for 64bit target only.

From-SVN: r226076

gcc/ChangeLog

+2015-07-22  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+	PR driver/66737
+	* config/i386/linux-common.h (MPX_SPEC): Use linker option
+	for 64bit target only.
+
 2015-07-22  Bernd Schmidt  <bernds@codesourcery.com>
 
 	* config/nvptx/nvptx.c: Expand some comments.

gcc/config/i386/linux-common.h

@@ -71,8 +71,12 @@ along with GCC; see the file COPYING3.  If not see
 #endif
 
 #ifndef MPX_SPEC
+#ifdef SPEC_64
 #define MPX_SPEC "\
- %{mmpx:%{fcheck-pointer-bounds:%{!static:" LINK_MPX "}}}"
+ %{mmpx:%{fcheck-pointer-bounds:%{!static:%{" SPEC_64 ":" LINK_MPX "}}}}"
+#else
+#define MPX_SPEC ""
+#endif
 #endif
 
 #ifndef LIBMPX_SPEC