--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/common/config/msp430/msp430-common.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,87 @@
+/* Common hooks for Texas Instruments MSP430.
+   Copyright (C) 2014-2017 Free Software Foundation, Inc.
+
+   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/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "diagnostic-core.h"
+#include "tm.h"
+#include "common/common-target.h"
+#include "common/common-target-def.h"
+#include "opts.h"
+#include "flags.h"
+
+/* Check for generic -mcpu= and -mmcu= names here.  If found then we
+   convert to a baseline cpu name.  Otherwise we allow the option to
+   be passed on to the backend where it can be checked more fully.  */
+
+static bool
+msp430_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
+		      struct gcc_options *opts_set ATTRIBUTE_UNUSED,
+		      const struct cl_decoded_option *decoded,
+		      location_t loc ATTRIBUTE_UNUSED)
+{
+  switch (decoded->opt_index)
+    {
+    case OPT_mcpu_:
+      if (strcasecmp (decoded->arg, "msp430x") == 0
+	  || strcasecmp (decoded->arg, "msp430xv2") == 0
+	  || strcasecmp (decoded->arg, "430x") == 0
+	  || strcasecmp (decoded->arg, "430xv2") == 0)
+	{
+	  target_cpu = "msp430x";
+	}
+      else if (strcasecmp (decoded->arg, "msp430") == 0
+	       || strcasecmp (decoded->arg, "430") == 0)
+	{
+	  target_cpu = "msp430";
+	}
+      else
+	{
+	  error ("unrecognized argument of -mcpu: %s", decoded->arg);
+	  return false;
+	}
+      break;
+
+    case OPT_mmcu_:
+      /* For backwards compatibility we recognise two generic MCU
+	 430X names.  However we want to be able to generate special C
+	 preprocessor defines for them, which is why we set target_mcu
+	 to NULL.  */
+      if (strcasecmp (decoded->arg, "msp430") == 0)
+	{
+	  target_cpu = "msp430";
+	  target_mcu = NULL;
+	}
+      else if (strcasecmp (decoded->arg, "msp430x") == 0
+	       || strcasecmp (decoded->arg, "msp430xv2") == 0)
+	{
+	  target_cpu = "msp430x";
+	  target_mcu = NULL;
+	}
+      break;
+    }
+      
+  return true;
+}
+
+#undef  TARGET_HANDLE_OPTION
+#define TARGET_HANDLE_OPTION			msp430_handle_option
+
+struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;