--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/avr/specs.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,80 @@
+/* Specs definitions for Atmel AVR back end.
+
+   Copyright (C) 2012-2017 Free Software Foundation, Inc.
+   Contributed by Georg-Johann Lay (avr@gjlay.de)
+
+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/>.  */
+
+
+/* Default specs layout.  The actual definitions might be superseeded
+   by device- or OS- specific files, like avrlibc.h, ../rtems.h, etc.
+   The specs are repeated in the device specs files.  Subspecs are
+   specs known to GCC or specs defined in the device specs files.  */
+
+
+#undef  CPLUSPLUS_CPP_SPEC
+#define CPLUSPLUS_CPP_SPEC                      \
+  "%(cpp)"
+
+#undef  CC1_SPEC
+#define CC1_SPEC                                \
+  "%(cc1_n_flash) "                             \
+  "%(cc1_errata_skip) "                         \
+  "%(cc1_rmw) "                                 \
+  "%(cc1_absdata) "
+
+#undef  CC1PLUS_SPEC
+#define CC1PLUS_SPEC                                    \
+  "%(cc1) "                                             \
+  "%{!frtti:-fno-rtti} "                                \
+  "%{!fenforce-eh-specs:-fno-enforce-eh-specs} "        \
+  "%{!fexceptions:-fno-exceptions} "
+
+#define ASM_RELAX_SPEC                          \
+  "%{mrelax:--mlink-relax} "
+
+#undef  ASM_SPEC
+#define ASM_SPEC                                \
+  "%(asm_arch) "                                \
+  "%(asm_relax) "                               \
+  "%(asm_rmw) "                                 \
+  "%(asm_gccisr) "                              \
+  "%(asm_errata_skip) "
+
+#define LINK_ARCH_SPEC                          \
+  "%{mmcu=*:-m%*} "
+
+#define LINK_RELAX_SPEC                         \
+  "%{mrelax:--relax} "
+
+#undef  LINK_SPEC
+#define LINK_SPEC                               \
+  "%(link_arch) "                               \
+  "%(link_data_start) "                         \
+  "%(link_text_start) "                         \
+  "%(link_relax) "                              \
+  "%(link_pmem_wrap) "                          \
+  "%{shared:%eshared is not supported} "
+
+#undef  LIB_SPEC
+#define LIB_SPEC " %{!mmcu=avr1:-lc} "
+
+#undef  LIBGCC_SPEC
+#define LIBGCC_SPEC " %{!mmcu=avr1:-lgcc} "
+
+#define STARTFILE_SPEC ""
+#define ENDFILE_SPEC ""