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#!/bin/sh
# Configuration script for GNU C++
#   Copyright (C) 1988 Free Software Foundation, Inc.

#This file is part of GNU CC.

#GNU CC 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 1, or (at your option)
#any later version.

#GNU CC 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 GNU CC; see the file COPYING.  If not, write to
#the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

#
# Shell script to create proper links to machine-dependent files in
# preparation for compiling g++.  Also, files borrowed verbatim from
# GNU CC have their links made by this program.
#
# Usage: config.g++ [vint] machine
#
# If config.g++ succeeds, it leaves its status in config.status.
# If config.g++ fails after disturbing the status quo, 
# 	config.status is removed.
#

progname=$0
remove=rm
hard_link=ln
symbolic_link='ln -s'

#for Test
#remove="echo rm"
#hard_link="echo ln"
#symbolic_link="echo ln -s"

for arg in $*;
do
  case $arg in
   -srcdir=*)
	srcdir=`echo $arg | sed s/-srcdir=//`
	;;
   -vint)
	vint=on
	;;
   *)
	machine=$arg
	;;
  esac
done

# Find the source files, if location was not specified.
if [ x$srcdir = x ]
then
	srcdirdefaulted=1
	srcdir=.
	if [ ! -r tree.c ]
	then
		srcdir=..
	fi
fi

if [ ! -r ${srcdir}/tree.c ]
then
	if [ x$srcdirdefaulted = x ]
	then
	  echo "$progname: Can't find compiler sources in \`${srcdir}'." 1>&2
	else
	  echo "$progname: Can't find compiler sources in \`.' or \`..'." 1>&2
	fi
	exit 1
fi

if [ x$machine != x ];
then
	case $machine in
	vax)					# for vaxen running bsd
		;;
	vms)					# for vaxen running VMS
		cpu_type=vax
		configuration_file=xm-${machine}.h
		machine_type=${machine}
		;;
	vax-sysv | vaxv)			# for vaxen running system V
		cpu_type=vax
		configuration_file=xm-vaxv.h
		machine_type=vaxv
		;;
	sequent-i386)			# for Intel 80386's on Sequent Symmetry
		cpu_type=i386
		configuration_file=xm-i386.h
		machine_type=seq386
		;;
	i386-sysv | i386v)		# for Intel 80386's running system V
		machine=i386v
		cpu_type=i386
		configuration_file=xm-${machine}.h
		machine_type=${machine}
		;;
	i386-sysv-gas | i386g)
		cpu_type=i386
		configuration_file=xm-i386v.h
		machine_type=i386gas
		;;		
	i860)
		;;
	next )
		cpu_type=m68k
		configuration_file=xm-m68k.h      
		machine_type=next
	;;
	sun4 | sun-4)
		cpu_type=sparc
		configuration_file=xm-sparc.h
		machine_type=sun4os3
		;;
	sun3 | sun-3)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun3
		;;
	sun3-nfp | sun-3-nfp)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun3-nfp
		;;
	sun3-fpa | sun-3-fpa)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun3-fpa
		;;
	sun2 | sun-2)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun2
		;;
	sun386 | sun386i | roadrunner)
		cpu_type=i386
		configuration_file=xm-sun386i.h
		machine_type=sun386i
		;;
	sun4-os4 | sun-4-os4)
		cpu_type=sparc
		target_machine=tm-sparc.h
		machine_type=sparc
		;;
	sun3-os4 | sun-3-os4)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun3
		;;
	sun3-nfp-os4 | sun-3-nfp-os4)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun3-nfp
		;;
	sun3-fpa-os4 | sun-3-fpa-os4)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun3-fpa
		;;
	sun2-os4 |sun-2-os4)
		cpu_type=m68k
		configuration_file=xm-m68k.h
		machine_type=sun2
		;;
	hp9k320)			# HP 9000 series 300 with gcc alone
		cpu_type=m68k
		configuration_file=xm-hp9k320.h
		;;
	hp9k320-old)			# HP 9000 series 300 with gcc alone
		cpu_type=m68k
		target_machine=tm-hp9k32old.h
		configuration_file=xm-hp9k320.h
		;;
	hp9k320-gas | hp9k320g)			#    with gnu as, ld and gdb
		cpu_type=m68k
		configuration_file=xm-hp9k320.h
		;;
	hp9k320-bsd | hp300)		# HP 9000/3xx running Berkeley Unix
		cpu_type=m68k
		target_machine=tm-hp9k3bsd.h
		;;
	hp9k800)			# HP 9000 series 800 with g++ alone
		cpu_type=hp9k8
		configuration_file=xm-hp9k8.h
		aux_output=out-hp9k8.c
		machine_type=hp9k8
		;;
	isi68)
		cpu_type=m68k
		;;
	news800)
	        configuration_file=xm-m68k.h
	        target_machine=tm-news.h
		cpu_type=m68k
		;;
	news-gas | news-g)
	        configuration_file=xm-m68k.h
	        target_machine=tm-newsgas.h
		cpu_type=m68k
		;;
	altos | altos3068)        # Altos 3068 with gnu as, ld and gdb
        	cpu_type=m68k
	        configuration_file=xm-altos3068.h
	        target_machine=tm-altos3068.h
	        ;;
	3b1)
		cpu_type=m68k
		configuration_file=xm-${machine}.h
		;;
	sequent-ns32k | sequent)
		cpu_type=ns32k
		aux_output=out-ns32k.c
		;;
	encore)
		cpu_type=ns32k
		aux_output=out-ns32k.c
		;;
	genix)
		machine=ns32k
		cpu_type=ns32k
		configuration_file=xm-genix.h
		;;
	88000)
		cpu_type=m88k
		machine_type=${cpu_type}
		;;
	alliant)				# Alliant FX/8
		;;
	convex-c1)				# Convex C1
		machine_type=convex1
		cpu_type=convex
		;;
	convex-c2)				# Convex C2
		machine_type=convex2
		cpu_type=convex
		;;
	pyr)
		;;
	iris)					# Mostly like a MIPS.
		cpu_type=mips
		target_machine=tm-iris.h
		configuration_file=xm-iris.h
		;;
	mips)				# Default MIPS environment
		;;
	mips-sysv)			# SYSV variant of MIPS system.
		cpu_type=mips
		target_machine=tm-mips-sysv.h
	        ;;
	mips-bsd43)			# BSD 4.3 variant of MIPS system.
		cpu_type=mips
		target_machine=tm-mips-bsd.h
	        ;;
	dec-3100 | decstation)		# Decstation or pmax.
		cpu_type=mips
		target_machine=tm-decstatn.h
	        ;;
#	370)
#		machine=370
#		;;
	esac

	$remove -f config.h tm.h md aux-output.c

		# if cpu_type is not set, define cpu_type to machine.
		#
	cpu_type=${cpu_type-$machine}
	configuration_file=${configuration_file-xm-$cpu_type.h}
	machine_type=${machine_type-$machine}
	target_machine=${target_machine-tm-${machine_type}.h}
	machine_description=${cpu_type}.md
	aux_output=${aux_output=out-$cpu_type.c}

	if [ xx${vint} = xx ]
	then
		files="$configuration_file $target_machine
			$machine_description $aux_output"
		links="config.h tm.h md aux-output.c"
	else
		files="$configuration_file tm-vmc.h $target_machine
			$machine_description $aux_output"
		links="config.h tm.h tm-pre.h md aux-output.c"
	fi

	while [ -n "$files" ]
	do
		# set file to car of files, files to cdr of files
		set $files; file=$1; shift; files=$*
		set $links; link=$1; shift; links=$*

		if [ ! -r ${srcdir}/config/$file ]
		then
			echo "$progname: cannot create a link \`$link'," 1>&2
			echo "since the file \`config/$file' does not exist." 1>&2
			exit 1
		fi

		$remove -f $link
		rm -f config.status
		# Make a symlink if possible, otherwise try a hard link
		$symbolic_link ${srcdir}/config/$file $link 2>/dev/null || $hard_link ${srcdir}/config/$file $link

		if [ ! -r $link ]
		then
			echo "$progname: unable to link \`$link' to \`${srcdir}/config/$file'." 1>&2
			exit 1
		fi
		echo "Linked \`$link' to \`${srcdir}/config/$file'."
	done

	if [ xx${vint} = xx ]
	then
		echo "Links are now set up for use with a $machine." \
			| tee config.status
	else
		echo "Links are now set up for use with a $machine (vint)." \
			| tee config.status
	fi

	# Install a makefile, and make it set VPATH
	# if necessary so that the sources are found.
	# Also change its value of srcdir.
	# Also create a .gdbinit file which runs the one in srcdir
	# and tells GDB to look there for source files.
	case $srcdir in
	.)
		;;
	*)
		echo "VPATH = ${srcdir}" > x
		cat x ${srcdir}/Makefile | sed "s@^srcdir = \.@srcdir = ${srcdir}@" > Makefile
		rm x
		echo "dir ${srcdir}" > .gdbinit
		echo "source ${srcdir}/.gdbinit" >> .gdbinit
		;;
	esac

	exit 0
else
	echo "Usage: $progname machine"
	echo -n "Where \`machine' is something like "
	echo "\`vax', \`sun3', \`umax', etc."
	if [ -r config.status ]
	then
		cat config.status
	fi
	exit 1
fi
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