--- a/gcc/config.build	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config.build	Fri Oct 27 22:46:09 2017 +0900
@@ -1,6 +1,5 @@
 # GCC build-specific configuration file.
-# Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008, 2009, 2010
-# Free Software Foundation, Inc.
+# Copyright (C) 1997-2017 Free Software Foundation, Inc.
 
 #This file is part of GCC.
 
@@ -51,31 +50,13 @@
 
 # System-specific settings.
 case $build in
-  alpha64-dec-*vms*)
-    build_xm_file="vms/xm-vms.h vms/xm-vms64.h"
-    build_exeext=.exe
-    build_install_headers_dir=install-headers-cp
-    prefix=/gnu
-    local_prefix=/gnu/local
-    ;;
-  alpha*-dec-*vms*)
-    build_xm_file="vms/xm-vms.h"
-    build_exeext=.exe
-    build_install_headers_dir=install-headers-cp
-    prefix=/gnu
-    local_prefix=/gnu/local
-    ;;
   hppa1.0-*-hpux1[01]* | \
   hppa*64*-*-hpux11* | \
   hppa1.1-*-hpux11* | \
   hppa2*-*-hpux11* )
     build_install_headers_dir=install-headers-cpio
     ;;
-  i370-*-opened* | i370-*-mvs* )
-    # IBM 360/370/390 Architecture
-    build_xm_defines='FATAL_EXIT_CODE=12'
-    ;;
-  i[34567]86-*-cygwin* | i[34567]86-*-pe )
+  i[34567]86-*-cygwin* | x86_64-*-cygwin* )
     build_xm_file=i386/xm-cygwin.h
     build_exeext=.exe
     ;;
@@ -92,41 +73,15 @@
     build_xm_file=i386/xm-djgpp.h
     build_exeext=.exe
     ;;
-  i[34567]86-*-sco3.2v5*) 
-    # 80386 running SCO Open Server 5
-    build_install_headers_dir=install-headers-cpio
-    ;;
-  i[34567]86-sequent-ptx4* | i[34567]86-sequent-sysv4* )
-    build_install_headers_dir=install-headers-cpio
-    ;;
-  i[34567]86-*-sysv4*) 
-    # Intel x86 running system V r4
-    build_install_headers_dir=install-headers-cpio
-    ;;
-  i[34567]86-*-udk*) 
-    # Intel x86 on SCO UW/OSR5 Dev Kit
-    build_install_headers_dir=install-headers-cpio
-    ;;
-  i[34567]86-*-uwin*)
-    build_exeext=.exe
-    ;;
-  i386-*-vsta) 
-    # Intel 80386's running VSTa kernel
-    ;;
-  ia64-hp-*vms*)
-    build_xm_file="vms/xm-vms.h vms/xm-vms64.h"
-    build_exeext=.exe
-    build_install_headers_dir=install-headers-cp
-    prefix=/gnu
-    local_prefix=/gnu/local
-    ;;
-  m68000-hp-hpux* | m68k-hp-hpux*) 
-    # HP 9000 series 300
-    build_install_headers_dir=install-headers-cpio
-    ;;
   *-*-sysv*)
     # All other System V variants.
     build_install_headers_dir=install-headers-cpio
     ;;
+  *-*-*vms*)
+    # All OpenVMS targets.
+    build_xm_file="vms/xm-vms.h"
+    build_exeext=.exe
+    build_install_headers_dir=install-headers-cp
+    ;;
 esac