microblaze musl support

	* config/microblaze/linux.h (MUSL_DYNAMIC_LINKER): Define.
	(DYNAMIC_LINKER): Renamed to ...
	(GLIBC_DYNAMIC_LINKER): This.
	(SUBTARGET_EXTRA_SPECS): Use GNU_USER_DYNAMIC_LINKER.


Co-Authored-By: Szabolcs Nagy <szabolcs.nagy@arm.com>

From-SVN: r228850

gcc/ChangeLog

+2015-10-15  Gregor Richards  <gregor.richards@uwaterloo.ca>
+	    Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* config/microblaze/linux.h (MUSL_DYNAMIC_LINKER): Define.
+	(DYNAMIC_LINKER): Renamed to ...
+	(GLIBC_DYNAMIC_LINKER): This.
+	(SUBTARGET_EXTRA_SPECS): Use GNU_USER_DYNAMIC_LINKER.
+
 2015-10-15  Marek Polacek  <polacek@redhat.com>
 
 	* tree-ssa-reassoc.c (attempt_builtin_copysign): Call

gcc/config/microblaze/linux.h

@@ -28,10 +28,20 @@
 #undef TLS_NEEDS_GOT
 #define TLS_NEEDS_GOT 1
 
-#define DYNAMIC_LINKER "/lib/ld.so.1"
+#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+
+#if TARGET_BIG_ENDIAN_DEFAULT == 0 /* LE */
+#define MUSL_DYNAMIC_LINKER_E "%{mbig-endian:;:el}"
+#else
+#define MUSL_DYNAMIC_LINKER_E "%{mlittle-endian:el}"
+#endif
+
+#undef MUSL_DYNAMIC_LINKER
+#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-microblaze" MUSL_DYNAMIC_LINKER_E ".so.1"
+
 #undef  SUBTARGET_EXTRA_SPECS
 #define SUBTARGET_EXTRA_SPECS \
-  { "dynamic_linker", DYNAMIC_LINKER }
+  { "dynamic_linker", GNU_USER_DYNAMIC_LINKER }
 
 #undef LINK_SPEC
 #define LINK_SPEC "%{shared:-shared} \