configure

gcc库的原代码,对编程有很大帮助.

		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		;;
	mips-sgi-irix4*)		# Mostly like a MIPS.
		if [ x$stabs = xyes ]; then
			tm_file=mips/iris4-gdb.h
		else
			tm_file=mips/iris4.h
		fi
		xm_file=mips/xm-iris4.h
		broken_install=yes
		xmake_file=mips/x-iris
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		;;
	mips-sgi-*)			# Mostly like a MIPS.
		if [ x$stabs = xyes ]; then
			tm_file=mips/iris3-gdb.h
		else
			tm_file=mips/iris3.h
		fi
		xm_file=mips/xm-iris3.h
		broken_install=yes
		xmake_file=mips/x-iris3
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		;;
	mips-dec-osfrose*)		# Decstation running OSF/1 reference port with OSF/rose.
		tm_file=mips/osfrose.h
		xmake_file=mips/x-osfrose
		tmake_file=mips/t-osfrose
		extra_objs=halfpic.o
		use_collect2=yes
		;;
	mips-dec-osf*)			# Decstation running OSF/1 as shipped by DIGITAL
		if [ x$stabs = xyes ]; then
			tm_file=mips/dec-gosf1.h
		else
			tm_file=mips/dec-osf1.h
		fi
		xmake_file=mips/x-dec-osf1
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			tmake_file=mips/t-ultrix
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		;;
	mips-dec-bsd*)                  # Decstation running 4.4 BSD
              tm_file=mips/dec-bsd.h
              xmake_file=
              tmake_file=
              fixincludes=
	      if [ x$gas = xyes ]
	      then
		   	tmake_file=mips/t-mips-gas
	      else
			tmake_file=mips/t-ultrix
			extra_passes="mips-tfile mips-tdump"
	      fi
	      if [ x$gnu_ld != xyes ]
	      then
			use_collect2=yes
	      fi
	      ;;
	mips-dec-netbsd*)                  # Decstation running NetBSD
		tm_file=mips/netbsd.h
		xm_file=mips/xm-netbsd.h
		xmake_file=x-netbsd
		tmake_file=t-libc-ok
		fixincludes=Makefile.in
		prefix=$native_prefix
		;;
	mips-sony-bsd* | mips-sony-newsos*)	# Sony NEWS 3600 or risc/news.
		if [ x$stabs = xyes ]; then
			tm_file=mips/news4-gdb.h
		else
			tm_file=mips/news4.h
		fi
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		xmake_file=mips/x-sony
		;;
	mips-sony-sysv*)		# Sony NEWS 3800 with NEWSOS5.0.
					# That is based on svr4.
		# t-svr4 is not right because this system doesn't use ELF.
		if [ x$stabs = xyes ]; then
			tm_file=mips/news5-gdb.h
		else
			tm_file=mips/news5.h
		fi
		xm_file=mips/xm-news.h
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		;;
	mips-tandem-sysv4*)		# Tandem S2 running NonStop UX
		if [ x$stabs = xyes ]; then
			tm_file=mips/svr4-t-gdb.h
		else
			tm_file=mips/svr4-t.h
		fi
		xm_file=mips/xm-sysv4.h
		xmake_file=mips/x-sysv
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
			extra_parts="crtbegin.o crtend.o"
		else
			tmake_file=mips/t-mips
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
		;;
	mips-*-ultrix* | mips-dec-mach3)	# Decstation.
		if [ x$stabs = xyes ]; then
			tm_file=mips/ultrix-gdb.h
		else
			tm_file=mips/ultrix.h
		fi
		xmake_file=mips/x-ultrix
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			tmake_file=mips/t-ultrix
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
	        ;;
	mips-*-riscos[56789]bsd*)
		if [ x$stabs = xyes ]; then	# MIPS BSD 4.3, RISC-OS 5.0
			tm_file=mips/bsd-5-gdb.h
		else
			tm_file=mips/bsd-5.h
		fi
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-bsd-gas
		else
			tmake_file=mips/t-bsd
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
	        ;;
	mips-*-bsd* | mips-*-riscosbsd* | mips-*-riscos[1234]bsd*)
		if [ x$stabs = xyes ]; then	# MIPS BSD 4.3, RISC-OS 4.0
			tm_file=mips/bsd-4-gdb.h
		else
			tm_file=mips/bsd-4.h
		fi
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-bsd-gas
		else
			tmake_file=mips/t-bsd
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
	        ;;
	mips-*-riscos[56789]sysv4*)
		if [ x$stabs = xyes ]; then	# MIPS System V.4., RISC-OS 5.0
			tm_file=mips/svr4-5-gdb.h
		else
			tm_file=mips/svr4-5.h
		fi
		xm_file=mips/xm-sysv4.h
		xmake_file=mips/x-sysv
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-svr4-gas
		else
			tmake_file=mips/t-svr4
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
		;;
	mips-*-sysv4* | mips-*-riscos[1234]sysv4* | mips-*-riscossysv4*)
		if [ x$stabs = xyes ]; then	# MIPS System V.4. RISC-OS 4.0
			tm_file=mips/svr4-4-gdb.h
		else
			tm_file=mips/svr4-4.h
		fi
		xm_file=mips/xm-sysv.h
		xmake_file=mips/x-sysv
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-svr4-gas
		else
			tmake_file=mips/t-svr4
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
		;;
	mips-*-riscos[56789]sysv*)
		if [ x$stabs = xyes ]; then	# MIPS System V.3, RISC-OS 5.0
			tm_file=mips/svr3-5-gdb.h
		else
			tm_file=mips/svr3-5.h
		fi
		xm_file=mips/xm-sysv.h
		xmake_file=mips/x-sysv
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-svr3-gas
		else
			tmake_file=mips/t-svr3
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
		;;
	mips-*-sysv* | mips-*-riscos*sysv*)
		if [ x$stabs = xyes ]; then	# MIPS System V.3, RISC-OS 4.0
			tm_file=mips/svr3-4-gdb.h
		else
			tm_file=mips/svr3-4.h
		fi
		xm_file=mips/xm-sysv.h
		xmake_file=mips/x-sysv
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-svr3-gas
		else
			tmake_file=mips/t-svr3
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
		;;
	mips-*-riscos[56789]*)			# Default MIPS RISC-OS 5.0.
		if [ x$stabs = xyes ]; then
			tm_file=mips/mips-5-gdb.h
		else
			tm_file=mips/mips-5.h
		fi
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		broken_install=yes
		;;
	mips-*-gnu*)
		cpu_type=mips	# GNU supports this CPU; rest done below.
		;;
	mipsel-*-ecoff*)
		cpu_type=mips
		if [ x$stabs = xyes ]; then
		    tm_file=mips/ecoffl-gdb.h
		else
		    tm_file=mips/ecoffl.h
		fi
		tmake_file=mips/t-ecoff
		;;
	mips-*-ecoff*)
		if [ x$stabs = xyes ]; then
		    tm_file=mips/ecoff-gdb.h
		else
		    tm_file=mips/ecoff.h
		fi
		tmake_file=mips/t-ecoff
		broken_install=yes
		;;
	mipsel-*-elf*)
		cpu_type=mips
		tm_file=mips/elfl.h
		tmake_file=mips/t-ecoff
		;;
	mips-*-elf*)
		cpu_type=mips
		tm_file=mips/elf.h
		tmake_file=mips/t-ecoff
		;;
	mips64el-*-elf*)
		cpu_type=mips
		tm_file=mips/elfl64.h
		tmake_file=mips/t-ecoff
		;;
	mips64orionel-*-elf*)
		cpu_type=mips
		tm_file=mips/elflorion.h
		tmake_file=mips/t-ecoff
		;;
	mips64-*-elf*)
		cpu_type=mips
		tm_file=mips/elf64.h
		tmake_file=mips/t-ecoff
		;;
	mips64orion-*-elf*)
		cpu_type=mips
		tm_file=mips/elforion.h
		tmake_file=mips/t-ecoff
		;;
	mips-*-*)				# Default MIPS RISC-OS 4.0.
		if [ x$stabs = xyes ]; then
			tm_file=mips/mips-4-gdb.h
		else
			tm_file=mips/mips.h
		fi
		if [ x$gas = xyes ]
		then
			tmake_file=mips/t-mips-gas
		else
			extra_passes="mips-tfile mips-tdump"
		fi
		if [ x$gnu_ld != xyes ]
		then
			use_collect2=yes
		fi
		;;
	ns32k-encore-bsd*)
		tm_file=ns32k/encore.h
		use_collect2=yes
		;;
	ns32k-sequent-bsd*)
		tm_file=ns32k/sequent.h
		use_collect2=yes
		;;
	ns32k-tek6100-bsd*)
		tm_file=ns32k/tek6100.h
		broken_install=yes
		use_collect2=yes
		;;
	ns32k-tek6200-bsd*)
		tm_file=ns32k/tek6200.h
		broken_install=yes
		use_collect2=yes
		;;
# This has not been updated to GCC 2.
#	ns32k-ns-genix*)
#		xm_file=ns32k/xm-genix.h
#		xmake_file=ns32k/x-genix
#		tm_file=ns32k/genix.h
#		broken_install=yes
#		use_collect2=yes
#		;;
	ns32k-merlin-*)
		tm_file=ns32k/merlin.h
		use_collect2=yes
		;;
	ns32k-pc532-mach*)
		tm_file=ns32k/pc532-mach.h
		use_collect2=yes
		;;
	ns32k-pc532-minix*)
		tm_file=ns32k/pc532-min.h
		xm_file=ns32k/xm-pc532-min.h
		use_collect2=yes
		;;
	ns32k-pc532-netbsd*)
		tm_file=ns32k/netbsd.h
		xm_file=ns32k/xm-netbsd.h
		tmake_file=t-libc-ok
		# On NetBSD, the headers are already okay.
		fixincludes=Makefile.in
		xmake_file=x-netbsd
		;;
	pyramid-*-*)
		cpu_type=pyr
		xmake_file=pyr/x-pyr
		use_collect2=yes
		;;
	romp-*-aos*)
		use_collect2=yes
		;;
	romp-*-mach*)
		xmake_file=romp/x-mach
		use_collect2=yes
		;;
	powerpc-ibm-aix[456789].*)
		cpu_type=rs6000
		tm_file=rs6000/aix41ppc.h
		tmake_file=rs6000/t-newas
		use_collect2=yes
		;;
	powerpc-ibm-aix*)
		cpu_type=rs6000
		tm_file=rs6000/powerpc.h
		tmake_file=rs6000/t-rs6000
		use_collect2=yes
		;;
	powerpc-*-sysv4* | powerpc-*-elf*)
		cpu_type=rs6000
		xm_file=rs6000/xm-sysv4.h
		tm_file=rs6000/sysv4.h
		if [ x$gas = xyes ]
		then
		     tmake_file=rs6000/t-ppcgas
		else
		     tmake_file=rs6000/t-ppc
		fi
		xmake_file=rs6000/x-sysv4
		;;
	powerpc-*-eabiaix*)
		cpu_type=rs6000
		tm_file=rs6000/eabiaix.h
		tmake_file=rs6000/t-eabiaix
		fixincludes=Makefile.in
		;;
	powerpc-*-eabisim*)
		cpu_type=rs6000
		tm_file=rs6000/eabisim.h
		tmake_file=rs6000/t-eabisim
		fixincludes=Makefile.in
		;;
	powerpc-*-eabi*)
		cpu_type=rs6000
		tm_file=rs6000/eabi.h
		if [ x$gas = xyes ]
		then
		     tmake_file=rs6000/t-eabigas
		else
		     tmake_file=rs6000/t-eabi
		fi
		fixincludes=Makefile.in
		;;
	powerpcle-*-sysv4* | powerpcle-*-elf*)
		cpu_type=rs6000
		xm_file=rs6000/xm-sysv4.h
		tm_file=rs6000/sysv4le.h
		if [ x$gas = xyes ]
		then
		     tmake_file=rs6000/t-ppclegas
		else
		     tmake_file=rs6000/t-ppc
		fi
		xmake_file=rs6000/x-sysv4
		;;
	powerpcle-*-eabisim*)
		cpu_type=rs6000
		tm_file=rs6000/eabilesim.h
		tmake_file=rs6000/t-eabisim
		fixincludes=Makefile.in
		;;
	powerpcle-*-eabi*)
		cpu_type=rs6000
		tm_file=rs6000/eabile.h
		if [ x$gas = xyes ]
		then
		     tmake_file=rs6000/t-eabilegas
		else
		     tmake_file=rs6000/t-eabi
		fi
		fixincludes=Makefile.in
		;;
	rs6000-ibm-aix3.[01]*)
		tm_file=rs6000/aix31.h
		tmake_file=rs6000/t-rs6000
		xmake_file=rs6000/x-aix31
		use_collect2=yes
		;;
	rs6000-ibm-aix3.2.[456789]*)
		tm_file=rs6000/aix3newas.h
		tmake_file=rs6000/t-newas
		use_collect2=yes
		;;
	rs6000-ibm-aix[456789].*)
		tm_file=rs6000/aix41.h
		tmake_file=rs6000/t-newas
		xmake_file=rs6000/x-aix31
		use_collect2=yes
		;;
	rs6000-ibm-aix*)
		use_collect2=yes
		tmake_file=rs6000/t-rs6000
		;;
	rs6000-bull-bosx)
		tmake_file=rs6000/t-rs6000
		use_collect2=yes
		;;
	rs6000-*-mach*)
		xm_file=rs6000/xm-mach.h
		tm_file=rs6000/mach.h
		tmake_file=rs6000/t-rs6000
		xmake_file=rs6000/x-mach
		use_collect2=yes
		;;
	rs6000-*-lynxos*)
		xmake_file=rs6000/x-lynx
		xm_file=rs6000/xm-lynx.h
		tm_file=rs6000/lynx.h
		tmake_file=rs6000/t-rs6000
		use_collect2=yes
		;;
	sh-*-*)