--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/aarch64/t-aarch64-linux	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,28 @@
+# Machine description for AArch64 architecture.
+#  Copyright (C) 2009-2017 Free Software Foundation, Inc.
+#  Contributed by ARM Ltd.
+#
+#  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/>.
+
+LIB1ASMSRC   = aarch64/lib1funcs.asm
+LIB1ASMFUNCS = _aarch64_sync_cache_range
+
+AARCH_BE = $(if $(findstring TARGET_BIG_ENDIAN_DEFAULT=1, $(tm_defines)),_be)
+MULTILIB_OSDIRNAMES = mabi.lp64=../lib64$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
+MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu)
+
+MULTILIB_OSDIRNAMES += mabi.ilp32=../libilp32