--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/tilegx/linux.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,83 @@
+/* Definitions for TILE-Gx running Linux-based GNU systems with ELF.
+   Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   Contributed by Walter Lee (walt@tilera.com)
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+#undef CPP_SPEC
+#define CPP_SPEC "%{pthread:-D_REENTRANT}"
+
+#undef ASM_SPEC
+#define ASM_SPEC "%(endian_spec) %{m32:--32} %{m64:--64}"
+
+#undef	LINK_SPEC
+#define LINK_SPEC "%(endian_spec) \
+  %{m64:-m elf64tilegx} %{m32:-m elf32tilegx} \
+  %{shared:-shared} \
+  %{!shared: \
+    %{!static: \
+      %{rdynamic:-export-dynamic} \
+      -dynamic-linker \
+        %{ m32: /lib32/ld.so.1} \
+        %{!m32: /lib/ld.so.1}} \
+    %{static:-static}}"
+
+#define MULTILIB_DEFAULTS { "m64" }
+
+#define NO_PROFILE_COUNTERS	1
+
+#undef MCOUNT_NAME
+#define MCOUNT_NAME "__mcount"
+
+#undef NEED_INDICATE_EXEC_STACK
+#define NEED_INDICATE_EXEC_STACK 1
+
+#ifdef TARGET_LIBC_PROVIDES_SSP
+/* TILE-Gx glibc provides __stack_chk_guard two pointer-size words before
+   tp. */
+#define TARGET_THREAD_SSP_OFFSET (-2 * GET_MODE_SIZE (ptr_mode))
+#endif
+
+/* For __clear_cache in libgcc2.c.  */
+#ifdef IN_LIBGCC2
+
+/* Use the minimum page size of 4K.  Alternatively we can call
+   getpagesize() but it introduces a libc dependence.
+   See Linux arch/tile/include/uapi/arch/icache.h for more commentary.  */
+#undef CLEAR_INSN_CACHE
+#define CLEAR_INSN_CACHE(BEG, END)                                      \
+{                                                                       \
+  long size = (long) (END) - (long) (BEG);                              \
+  if (size)                                                             \
+    {                                                                   \
+      const char *p = (const char *) ((unsigned long) (BEG) & -64L);    \
+      const char *end = p + (size < 4096 ? size : 4096) - 1;            \
+      __insn_mf ();                                                     \
+      for (; p <= end; p += 64)                                         \
+        __insn_icoh (p);                                                \
+      __insn_drain ();                                                  \
+    }                                                                   \
+}
+
+#else
+
+/* define CLEAR_INSN_CACHE so that gcc knows to expand __builtin__clear_cache
+   to the libraray call.  */
+#undef CLEAR_INSN_CACHE
+#define CLEAR_INSN_CACHE 1
+
+#endif