--- a/gcc/config/microblaze/linux.h	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config/microblaze/linux.h	Fri Oct 27 22:46:09 2017 +0900
@@ -1,5 +1,5 @@
 /* Definitions for MicroBlaze running Linux.
-   Copyright 2009, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2009-2017 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -19,11 +19,30 @@
    along with GCC; see the file COPYING3.  If not see
    <http://www.gnu.org/licenses/>.  */
 
+#undef TARGET_SUPPORTS_PIC
+#define TARGET_SUPPORTS_PIC 1
 
-#define DYNAMIC_LINKER "/lib/ld.so.1"
+#undef CPP_SPEC
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
+
+#undef TLS_NEEDS_GOT
+#define TLS_NEEDS_GOT 1
+
+#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
+
+#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} \
@@ -31,5 +50,12 @@
     %{!static: \
       %{rdynamic:-export-dynamic} \
       -dynamic-linker %(dynamic_linker)} \
-    %{static:-static}}"
+    %{static:-static}} \
+  %{mbig-endian:-EB} \
+  %{mlittle-endian:-EL}"
 
+/* For the microblaze-*-linux* subtarget.  */
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS() GNU_USER_TARGET_OS_CPP_BUILTINS()
+
+#define TARGET_ASM_FILE_END file_end_indicate_exec_stack