[Microblaze] Redefine LINK_SPEC for RTEMS

gcc/

	* config/microblaze/rtems.h: Redefine LINK_SPEC to avoid
	xilink.ld and flags not relevant to RTEMS.

From-SVN: r235465

gcc/ChangeLog

+2016-04-27  Joel Sherrill  <joel@rtems.org>
+
+	* config/microblaze/rtems.h: Redefine LINK_SPEC to avoid
+	xilink.ld and flags not relevant to RTEMS.
+
 2016-04-26  Zhouyi Zhou  <yizhouzhou@ict.ac.cn>
 
 	* toplev.c (backend_init_target): Avoid calling init_reload when using

gcc/config/microblaze/rtems.h

@@ -23,3 +23,10 @@ along with GCC; see the file COPYING3.  If not see
   builtin_define( "__rtems__" );		\
   builtin_assert( "system=rtems" );		\
 } while (0)
+
+/* Redefine to include only items relevant for RTEMS */
+#undef LINK_SPEC
+#define LINK_SPEC "%{shared:-shared} -N -relax \
+  %{mbig-endian:-EB --oformat=elf32-microblaze} \
+  %{mlittle-endian:-EL --oformat=elf32-microblazeel} \
+  %{mxl-gp-opt:%{G*}} %{!mxl-gp-opt: -G 0}"