(vc-diff): If `diff' gives empty output, return nil.

[bpt/emacs.git] / config.sub

#!/bin/sh
# Configuration validation subroutine script, version 1.1.
#   Copyright (C) 1991, 1992 Free Software Foundation, Inc.
# This file is (in principle) common to ALL GNU software.
# The presence of a machine in this file suggests that SOME GNU software
# can handle that machine.  It does not imply ALL GNU software can. 

#This file 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 2 of the License, or
#(at your option) any later version.

#This program 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 this program; if not, write to the Free Software
#Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


# Configuration subroutine to validate and canonicalize a configuration type.
# Supply the specified configuration type as an argument.
# If it is invalid, we print an error message on stderr and exit with code 1.
# Otherwise, we print the canonical config type on stdout and succeed.

# This file is supposed to be the same for all GNU packages
# and recognize all the CPU types, system types and aliases
# that are meaningful with *any* GNU software.
# Each package is responsible for reporting which valid configurations
# it does not support.  The user should be able to distinguish
# a failure to support a valid configuration from a meaningless
# configuration.

# The goal of this file is to map all the various variations of a given
# machine specification into a single specification in the form:
#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
# It is wrong to echo any other type of specification.

# First pass through any local machine types.
case $1 in
	*local*)
		echo $1
		exit 0
		;;
	*)
	;;
esac

# Separate what the user gave into CPU-COMPANY and OS (if any).
basic_machine=`echo $1 | sed 's/-[^-]*$//'`
if [ $basic_machine != $1 ]
then os=`echo $1 | sed 's/.*-/-/'`
else os=; fi

### Let's recognize common machines as not being operating systems so
### that things like config.sub decstation-3100 work.  We also
### recognize some manufacturers as not being operating systems, so we
### can provide default operating systems below.
case $os in
	-sun*os*)
		# Prevent following clause from handling this invalid input.
		;;
	-dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
	-att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
	-unicom* | -ibm* | -next* | -hp | -isi* | -apollo | -altos* | \
	-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi | \
	-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
	-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp )
		os=
		basic_machine=$1
		;;
	-sco3.2v[4-9]*)
		# Don't forget version if it is 3.2v4 or newer.
		basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
		;;
	-sco*)
		os=-sco3.2v2
		basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
		;;
	-isc)
		os=-isc2.2
		basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
		;;
	-clix*)
		basic_machine=clipper-intergraph
		;;
	-isc*)
		basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
		;;
esac

# Decode aliases for certain CPU-COMPANY combinations.
case $basic_machine in
	# Recognize the basic CPU types with without company name.
	# Some are omitted here because they have special meanings below.
	tahoe | i[34]86 | i860 | m68k | m68000 | m88k | ns32k | arm | pyramid \
		| tron | a29k | 580 | i960 | h8300 | hppa1.0 | hppa1.1 \
		| alpha | we32k | ns16k | clipper | sparclite | i370 | sh)
		basic_machine=$basic_machine-unknown
		;;
	# Object if more than one company name word.
	*-*-*)
		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
		exit 1
		;;
	# Recognize the basic CPU types with with company name.
	vax-* | tahoe-* | i[34]86-* | i860-* | m68k-* | m68000-* | m88k-* \
	      | sparc-* | ns32k-* | fx80-* | arm-* | c[123]* \
	      | mips-* | pyramid-* | tron-* | a29k-* | romp-* | rs6000-* \
	      | none-* | 580-* | cray2-* | h8300-* | i960-* | xmp-* | ymp-* \
	      | hppa1.0-* | hppa1.1-* | alpha-* | we32k-* | cydra-* | ns16k-* \
	      | pn-* | np1-* | xps100-* | clipper-* | orion-* | sparclite-* \
	      | sh-*)
		;;
	# Recognize the various machine names and aliases which stand
	# for a CPU type and a company and sometimes even an OS.
	vaxv)
		basic_machine=vax-dec
		os=-sysv
		;;
	vms)
		basic_machine=vax-dec
		os=-vms
		;;
	i370-ibm* | ibm*)
		basic_machine=i370-ibm
		os=-mvs
		;;
# I'm not sure what "Sysv32" means.  Should this be sysv3.2?
	i[34]86v32)
		basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
		os=-sysv32
		;;
	i[34]86v4*)
		basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
		os=-sysv4
		;;
	i[34]86v)
		basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
		os=-sysv
		;;
	i[34]86sol2)
		basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
		os=-solaris2
		;;
	spur)
		basic_machine=spur-unknown
		;;
	alliant | fx80)
		basic_machine=fx80-alliant
		;;
	convex-c1)
		basic_machine=c1-convex
		os=-bsd
		;;
	convex-c2)
		basic_machine=c2-convex
		os=-bsd
		;;
	convex-c32)
		basic_machine=c32-convex
		os=-bsd
		;;
	convex-c34)
		basic_machine=c34-convex
		os=-bsd
		;;
	convex-c38)
		basic_machine=c38-convex
		os=-bsd
		;;
	m88k-omron*)
		basic_machine=m88k-omron
		;;
	merlin)
		basic_machine=ns32k-utek
		os=-sysv
		;;
	crds | unos)
		basic_machine=m68k-crds
		;;
	elxsi)
		basic_machine=elxsi-elxsi
		os=-bsd
		;;
	encore | umax | mmax)
		basic_machine=ns32k-encore
		;;
	genix)
		basic_machine=ns32k-ns
		;;
	iris | iris4d)
		basic_machine=mips-sgi
		case $os in
		    -irix*)
			;;
		    *)
			os=-irix4
			;;
		esac
		;;
	news | news700 | news800 | news900)
		basic_machine=m68k-sony
		os=-newsos
		;;
	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
		basic_machine=m68000-att
		;;
	3b*)
		basic_machine=we32k-att
		;;
	delta | 3300 | motorola-3300 | motorola-delta \
	      | 3300-motorola | delta-motorola)
		basic_machine=m68k-motorola
		;;
	balance)
		basic_machine=ns32k-sequent
		os=-dynix
		;;
        pc532)
		basic_machine=ns32k-pc532
		;;
	symmetry)
		basic_machine=i386-sequent
		os=-dynix
		;;
	sun2)
		basic_machine=m68000-sun
		;;
	sun2os3)
		basic_machine=m68000-sun
		os=-sunos3
		;;
	sun2os4)
		basic_machine=m68000-sun
		os=-sunos4
		;;
	sun3os3)
		basic_machine=m68k-sun
		os=-sunos3
		;;
	sun3os4)
		basic_machine=m68k-sun
		os=-sunos4
		;;
	sun4os3)
		basic_machine=sparc-sun
		os=-sunos3
		;;
	sun4os4)
		basic_machine=sparc-sun
		os=-sunos4
		;;
	sun3)
		basic_machine=m68k-sun
		;;
	sun4)
		basic_machine=sparc-sun
		;;
	pbd)
		basic_machine=sparc-tti
		;;
	pbb)
		basic_machine=m68k-tti
		;;
	sun386 | sun386i | roadrunner)
		basic_machine=i386-sun
		;;
	ps2)
		basic_machine=i386-ibm
		;;
	fx2800)
		basic_machine=i860-alliant
		;;
	next)
		basic_machine=m68k-next
		os=-bsd
		;;
	amiga)
		basic_machine=m68k-cbm
		;;
	amigados)
		basic_machine=m68k-cbm
		os=-amigados
		;;
	amigaunix | amix)
		basic_machine=m68k-cbm
		os=-sysv4
		;;
	hp9k3[2-9][0-9])
		basic_machine=m68k-hp
		;;
	hp9k31[0-9] | hp9k2[0-9][0-9])
		basic_machine=m68000-hp
		;;
	hp9k7[0-9][0-9] | hp7[0-9][0-9] | hp9k8[0-9]7 | hp8[0-9]7)
		basic_machine=hppa1.1-hp
		;;
	hp9k8[0-9][0-9] | hp8[0-9][0-9])
		basic_machine=hppa1.0-hp
		;;
	isi68 | isi)
		basic_machine=m68k-isi
		os=-sysv
		;;
	apollo68)
		basic_machine=m68k-apollo
		os=-sysv
		;;
	altos | altos3068)
		basic_machine=m68k-altos
		;;
	miniframe)
		basic_machine=m68000-convergent
		;;
	tower | tower-32)
		basic_machine=m68k-ncr
		;;
	news-3600 | risc-news)
		basic_machine=mips-sony
		os=-newsos
		;;
	decstation | decstation-3100 | pmax | pmin | dec3100 | decstatn)
		basic_machine=mips-dec
		;;
	magnum | m3230)
		basic_machine=mips-mips
		os=-sysv
		;;
	gmicro)
		basic_machine=tron-gmicro
		os=-sysv
		;;
	rtpc | rtpc-*)
		basic_machine=romp-ibm
		;;
	am29k)
		basic_machine=a29k-none
		os=-bsd
		;;
	amdahl)
		basic_machine=580-amdahl
		os=-sysv
		;;
	cray | ymp)
		basic_machine=ymp-cray
		os=-unicos
		;;
	cray2)
		basic_machine=cray2-cray
		os=-unicos
		;;
	xmp)
		basic_machine=xmp-cray
		os=-unicos
		;;
	delta88)
		basic_machine=m88k-motorola
		os=-sysv3
		;;
	dpx2)
		basic_machine=m68k-bull
		os=-sysv
		;;
	ebmon29k)
		basic_machine=a29k-amd
		os=-ebmon
		;;
	h8300hms)
		basic_machine=h8300-hitachi
		os=-hms
		;;
	sh)
		basic_machine=sh-hitachi
		os=-hms
		;;
	harris)
		basic_machine=m88k-harris
		os=-sysv3
		;;
	hp300bsd)
		basic_machine=m68k-hp
		os=-bsd
		;;
	hp300hpux)
		basic_machine=m68k-hp
		os=-hpux
		;;
	hp9k2[0-9][0-9] | hp9k31[0-9])
		basic_machine=m68000-hp
		os=-hpux
		;;
	hp9k3[2-9][0-9])
		basic_machine=m68k-hp
		os=-hpux
		;;
	ncr3000)
		basic_machine=i486-ncr
		os=-sysv4
		;;
	news1000)
		basic_machine=m68030-sony
		os=-newsos
		;;
	nindy960)
		basic_machine=i960-intel
		os=-nindy
		;;
	pn)
		basic_machine=pn-gould
		;;
	np1)
		basic_machine=np1-gould
		;;
	ultra3)
		basic_machine=a29k-nyu
		os=-sym1
		;;
	vxworks960)
		basic_machine=i960-wrs
		os=-vxworks
		;;
	vxworks68)
		basic_machine=m68k-wrs
		os=-vxworks
		;;
        xps | xps100)
		basic_machine=xps100-honeywell
		;;
	none)
		basic_machine=none-none
		os=-none
		;;

# Here we handle the default manufacturer of certain CPU types.  It is in
# some cases the only manufacturer, in others, it is the most popular.
	mips)
		basic_machine=mips-mips
		;;
	romp)
		basic_machine=romp-ibm
		;;
	rs6000)
		basic_machine=rs6000-ibm
		;;
	vax)
		basic_machine=vax-dec
		;;
	we32k)
		basic_machine=we32k-att
		;;
	sparc)
		basic_machine=sparc-sun
		;;
        cydra)
		basic_machine=cydra-cydrome
		;;
	orion)
		basic_machine=orion-highlevel
		;;
	orion105)
		basic_machine=clipper-highlevel
		;;
	*)
		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
		exit 1
		;;
esac

# Here we canonicalize certain aliases for manufacturers.
case $basic_machine in
	*-digital*)
		basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
		;;
	*-commodore*)
		basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
		;;
	*)
		;;
esac

# Decode manufacturer-specific aliases for certain operating systems.

if [ "$os" ]
then
case $os in
	# -solaris* is a basic system type, with this one exception.
	-solaris1 | -solaris1.*)
		os=`echo $os | sed -e 's|solaris1|sunos4|'`
		;;
	# First accept the basic system types.
	# The portable systems comes first.
	# Each alternative must end in a *, to match a version number.
	-bsd* | -sysv* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
	      | -vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[34]* | -hpux* \
	      | -unos* | -osf* | -luna* | -dgux* | -solaris* | -sym* \
	      | -amigados* | -msdos* | -newsos* | -unicos* | -aos* \
	      | -nindy* | -vxworks* | -ebmon* | -hms* | -mvs* | -clix* \
	      | -riscos* | -linux* | -uniplus* | -iris* | -rtu* | -xenix* \
	      | -386bsd*)
		;;
	-sunos5*)
		os=`echo $os | sed -e 's|sunos5|solaris2|'`
		;;
	-sunos6*)
		os=`echo $os | sed -e 's|sunos6|solaris3|'`
		;;
	-osfrose*)
		os=-osfrose
		;;
	-osf*)
		os=-osf
		;;
	-utek*)
		os=-bsd
		;;
	-dynix*)
		os=-bsd
		;;
	-acis*)
		os=-aos
		;;
	-ctix* | -uts*)
		os=-sysv
		;;
	-triton*)
		os=-sysv3
		;;
	-oss*)
		os=-sysv3
		;;
	-svr4)
		os=-sysv4
		;;
	-svr3)
		os=-sysv3
		;;
	-xenix)
		os=-xenix
		;;
	-none)
		;;
	*)
		# Get rid of the `-' at the beginning of $os.
		os=`echo $1 | sed 's/[^-]*-//'`
		echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
		exit 1
		;;
esac
else

# Here we handle the default operating systems that come with various machines.
# The value should be what the vendor currently ships out the door with their
# machine or put another way, the most popular os provided with the machine.

# Note that if you're going to try to match "-MANUFACTURER" here (say,
# "-sun"), then you have to tell the case statement up towards the top
# that MANUFACTURER isn't an operating system.  Otherwise, code above
# will signal an error saying that MANUFACTURER isn't an operating
# system, and we'll never get to this point.

case $basic_machine in
	*-dec | vax-*)
		os=-ultrix4.2
		;;
	i386-sun)
		os=-sunos4.0.2
		;;
	m68000-sun)
		os=-sunos3
		# This also exists in the configure program, but was not the
		# default.
		# os=-sunos4
		;;
	*-tti)	# must be before sparc entry or we get the wrong os.
		os=-sysv3
		;;
	sparc-* | *-sun)
		os=-sunos4.1.1
		;;
	*-ibm)
		os=-aix
		;;
	*-hp)
		os=-hpux
		;;
	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
		os=-sysv
		;;
	*-cbm)
		os=-amigados
		;;
	*-dg)
		os=-dgux
		;;
	*-dolphin)
		os=-sysv3
		;;
	m88k-omron*)
		os=-luna
		;;
	*-sequent)
		os=-bsd
		;;
	*-crds)
		os=-unos
		;;
	*-ns)
		os=-genix
		;;
	i370-*)
		os=-mvs
		;;
	*-next)
		os=-bsd
		;;
	i[34]86-*)
		os=-sco3.2v2
		;;
        *-gould)
		os=-sysv
		;;
        *-highlevel)
		os=-bsd
		;;
	*-encore)
		os=-bsd
		;;
        *-sgi)
		os=-irix
		;;
	*-masscomp)
		os=-rtu
		;;
	*)
		os=-none
		;;
esac
fi

# Here we handle the case where we know the os, and the CPU type, but not the
# manufacturer.  We pick the logical manufacturer.
vendor=unknown
case $basic_machine in
	*-unknown)
		case $os in
			-sunos*)
				vendor=sun
				;;
			-aix*)
				vendor=ibm
				;;
			-hpux*)
				vendor=hp
				;;
			-unos*)
				vendor=crds
				;;
			-dgux*)
				vendor=dg
				;;
			-luna*)
				vendor=omron
				;;
			-genix*)
				vendor=ns
				;;
			-mvs*)
				vendor=ibm
				;;
		esac
		basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
		;;
esac

echo $basic_machine$os