libstdc++-v3/configure.host - gcc - Git at Google

 # configure.host
 #
 # This shell script handles all host based configuration for libstdc++.
 # It sets various shell variables based on the the host and the
 # configuration options.  You can modify this shell script without needing
 # to rerun autoconf/aclocal/etc.  This file is "sourced" not executed.
 #
 # You should read docs/html/17_intro/porting.* to make sense of this file.
 #
 #
 # It uses the following shell variables as set by config.guess:
 #   host                The configuration host (full CPU-vendor-OS triplet)
 #   host_cpu            The configuration host CPU
 #   host_os             The configuration host OS
 #
 #
 # It sets the following shell variables:
 #
 #   cpu_include_dir        CPU-specific directory, defaults to cpu/generic
 #                          if cpu/host_cpu doesn't exist.  This is
 #                          used to set atomicity_include_dir.
 #
 #   os_include_dir         OS-specific directory, defaults to os/generic.
 #
 #   c_model                the "C" header model, defaults to c_std.
 #
 #   c_compatibility        if "C" compatibility headers are necessary,
 #                          defaults to no.
 #
 #   abi_baseline_pair      directory name for ABI compat testing,
 #                          defaults to host_cpu-host_os (as per config.guess)
 #
 #   atomicity_dir          location of atomicity.h,
 #                          defaults to cpu_include_dir
 #
 #   atomic_word_dir        location of atomic_word.h
 #                          defaults to generic.
 #
 # It possibly modifies the following variables:
 #
 #   OPT_LDFLAGS            extra flags to pass when linking the library, of
 #                          the form '-Wl,blah'
 #                          (defaults to empty in acinclude.m4)
 #
 #   port_specific_symbol_files
 #                          whitespace-seperated list of files containing
 #                          additional symbols to export from the shared
 #                          library, when symbol versioning is in use
 #
 #
 # If the defaults will not work for your platform, you need only change the
 # variables that won't work, i.e., you do not need to explicitly set a
 # working variable to its default.  Most hosts only need to change the two
 # *_include_dir variables.


 # DEFAULTS
 # Try to guess a default cpu_include_dir based on the name of the CPU.  We
 # cannot do this for os_include_dir; there are too many portable operating
 # systems out there.  :-)
 c_model=c_std
 c_compatibility=no
 atomic_word_dir=cpu/generic

 # HOST-SPECIFIC OVERRIDES
 # Set any CPU-dependent bits.
 # Here we override defaults and catch more general cases due to naming
 # conventions (e.g., chip_name* to catch all variants).

 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
 case "${host_cpu}" in
   alpha*)
     try_cpu=alpha
     ;;
   i[567]86 | x86_64)
     try_cpu=i486
     ;;
   hppa*)
     try_cpu=hppa
     ;;
   mips*)
     # NB: cpu/mips/atomicity.h needs MIPS II or above.
     # Of course, there is no sane way to test for this, no ABI macro,
     # and no consistent host_cpu name differentiation. Therefore, only
     # use it where it is known to be safe, ie it runs linux (see below).
     try_cpu=generic
     ;;
   m680[246]0)
     try_cpu=m68k
     ;;
   powerpc* | rs6000)
     try_cpu=powerpc
     ;;
   s390x)
     try_cpu=s390
     ;;
   sparc* | ultrasparc)
     try_cpu=sparc
     ;;
   *)
     if test -f ${glibcxx_srcdir}/config/cpu/${host_cpu}/atomicity.h; then
       try_cpu=${host_cpu}
     else
       try_cpu=generic
     fi
     ;;
 esac

 # Set specific CPU overrides for atomic_word_dir. Most can just use generic.
 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
 case "${host_cpu}" in
   cris*)
     atomic_word_dir=cpu/cris
     ;;
   sparc* | ultrasparc)
     atomic_word_dir=cpu/sparc
     ;;
 esac

 # Now look for the file(s) usually tied to a CPU model, and make
 # default choices for those if they haven't been explicitly set
 # already.
 cpu_include_dir="cpu/${try_cpu}"
 atomicity_dir=$cpu_include_dir
 abi_baseline_pair=${try_cpu}-${host_os}


 # Set any OS-dependent bits.
 # Set the os_include_dir.
 # Set c_model, c_compatibility here.
 # If atomic ops and/or numeric limits are OS-specific rather than
 # CPU-specifc, set those here too.
 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
 case "${host_os}" in
   aix4.[3456789]* | aix[56789]*)
     # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
     # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
     # explicitly duplicate the directory for 4.[<3].
     os_include_dir="os/aix"
     atomicity_dir="os/aix"
     OPT_LDFLAGS="-Wl,-G"
     ;;
   aix4.*)
     os_include_dir="os/generic"
     atomicity_dir="os/aix"
     ;;
   aix*)
     os_include_dir="os/generic"
     atomicity_dir="cpu/generic"
     ;;
   bsd*)
     # Plain BSD attempts to share FreeBSD files.
     os_include_dir="os/bsd/freebsd"
     ;;
   cygwin*)
     os_include_dir="os/newlib"
     ;;
   *djgpp*)      # leading * picks up "msdosdjgpp"
     os_include_dir="os/djgpp"
     ;;
   freebsd*)
     os_include_dir="os/bsd/freebsd"
     ;;
   gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
     os_include_dir="os/gnu-linux"
     ;;
   hpux*)
     os_include_dir="os/hpux"
     ;;
   irix[1-6] | irix[1-5].* | irix6.[0-4]*)
     # This is known to work on at least IRIX 5.2 and 6.3.
     os_include_dir="os/irix/irix5.2"
     atomicity_dir=os/irix
     atomic_word_dir=os/irix
     ;;
   irix6.5*)
     os_include_dir="os/irix/irix6.5"
     atomicity_dir=os/irix
     atomic_word_dir=os/irix
     ;;
   mingw32*)
     os_include_dir="os/mingw32"
     ;;
   netbsd*)
     os_include_dir="os/bsd/netbsd"
     ;;
   qnx6.[12]*)
     os_include_dir="os/qnx/qnx6.1"
     c_model=c
     ;;
   solaris2)
     # This too-vague configuration does not provide enough information
     # to select a ctype include, and thus os_include_dir is a crap shoot.
     echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
     exit 1;
     ;;
   solaris2.5 | solaris2.5.[0-9])
     os_include_dir="os/solaris/solaris2.5"
     ;;
   solaris2.6)
     os_include_dir="os/solaris/solaris2.6"
     ;;
   solaris2.[789] | solaris2.1[0-9])
     os_include_dir="os/solaris/solaris2.7"
     ;;
   tpf)
     os_include_dir="os/tpf"
     ;;
   vxworks)
     os_include_dir="os/vxworks"
     ;;
   windiss*)
     os_include_dir="os/windiss"
     ;;
   *)
     os_include_dir="os/generic"
     ;;
 esac


 # Set any OS-dependent and CPU-dependent bits.
 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
 case "${host}" in
   alpha*-*-freebsd5*)
     abi_baseline_pair="alpha-freebsd5"
     ;;
   arm*-*-linux*)
     abi_baseline_pair="arm-linux-gnu"
     ;;
   i*86-*-freebsd4*)
     abi_baseline_pair="i386-freebsd4"
     ;;
   i*86-*-freebsd5*)
     abi_baseline_pair="i386-freebsd5"
     ;;
   mips*-*-linux*)
     atomicity_dir="cpu/mips"
     abi_baseline_pair="mips-linux-gnu"
     cpu_include_dir="cpu/mips"
     ;;
   s390-*-linux*)
     abi_baseline_pair="s390-linux-gnu"
     ;;
   s390x-*-linux*)
     abi_baseline_pair="s390x-linux-gnu"
     ;;
   sparc*-*-freebsd5*)
     abi_baseline_pair="sparc-freebsd5"
     ;;
   x86_64-*-linux*)
     abi_baseline_pair="x86_64-linux-gnu"
     ;;
 esac
	# configure.host
	#
	# This shell script handles all host based configuration for libstdc++.
	# It sets various shell variables based on the the host and the
	# configuration options. You can modify this shell script without needing
	# to rerun autoconf/aclocal/etc. This file is "sourced" not executed.
	#
	# You should read docs/html/17_intro/porting.* to make sense of this file.
	#
	#
	# It uses the following shell variables as set by config.guess:
	# host The configuration host (full CPU-vendor-OS triplet)
	# host_cpu The configuration host CPU
	# host_os The configuration host OS
	#
	#
	# It sets the following shell variables:
	#
	# cpu_include_dir CPU-specific directory, defaults to cpu/generic
	# if cpu/host_cpu doesn't exist. This is
	# used to set atomicity_include_dir.
	#
	# os_include_dir OS-specific directory, defaults to os/generic.
	#
	# c_model the "C" header model, defaults to c_std.
	#
	# c_compatibility if "C" compatibility headers are necessary,
	# defaults to no.
	#
	# abi_baseline_pair directory name for ABI compat testing,
	# defaults to host_cpu-host_os (as per config.guess)
	#
	# atomicity_dir location of atomicity.h,
	# defaults to cpu_include_dir
	#
	# atomic_word_dir location of atomic_word.h
	# defaults to generic.
	#
	# It possibly modifies the following variables:
	#
	# OPT_LDFLAGS extra flags to pass when linking the library, of
	# the form '-Wl,blah'
	# (defaults to empty in acinclude.m4)
	#
	# port_specific_symbol_files
	# whitespace-seperated list of files containing
	# additional symbols to export from the shared
	# library, when symbol versioning is in use
	#
	#
	# If the defaults will not work for your platform, you need only change the
	# variables that won't work, i.e., you do not need to explicitly set a
	# working variable to its default. Most hosts only need to change the two
	# *_include_dir variables.


	# DEFAULTS
	# Try to guess a default cpu_include_dir based on the name of the CPU. We
	# cannot do this for os_include_dir; there are too many portable operating
	# systems out there. :-)
	c_model=c_std
	c_compatibility=no
	atomic_word_dir=cpu/generic

	# HOST-SPECIFIC OVERRIDES
	# Set any CPU-dependent bits.
	# Here we override defaults and catch more general cases due to naming
	# conventions (e.g., chip_name* to catch all variants).

	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
	case "${host_cpu}" in
	alpha*)
	try_cpu=alpha
	;;
	i[567]86 \| x86_64)
	try_cpu=i486
	;;
	hppa*)
	try_cpu=hppa
	;;
	mips*)
	# NB: cpu/mips/atomicity.h needs MIPS II or above.
	# Of course, there is no sane way to test for this, no ABI macro,
	# and no consistent host_cpu name differentiation. Therefore, only
	# use it where it is known to be safe, ie it runs linux (see below).
	try_cpu=generic
	;;
	m680[246]0)
	try_cpu=m68k
	;;
	powerpc* \| rs6000)
	try_cpu=powerpc
	;;
	s390x)
	try_cpu=s390
	;;
	sparc* \| ultrasparc)
	try_cpu=sparc
	;;
	*)
	if test -f ${glibcxx_srcdir}/config/cpu/${host_cpu}/atomicity.h; then
	try_cpu=${host_cpu}
	else
	try_cpu=generic
	fi
	;;
	esac

	# Set specific CPU overrides for atomic_word_dir. Most can just use generic.
	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
	case "${host_cpu}" in
	cris*)
	atomic_word_dir=cpu/cris
	;;
	sparc* \| ultrasparc)
	atomic_word_dir=cpu/sparc
	;;
	esac

	# Now look for the file(s) usually tied to a CPU model, and make
	# default choices for those if they haven't been explicitly set
	# already.
	cpu_include_dir="cpu/${try_cpu}"
	atomicity_dir=$cpu_include_dir
	abi_baseline_pair=${try_cpu}-${host_os}


	# Set any OS-dependent bits.
	# Set the os_include_dir.
	# Set c_model, c_compatibility here.
	# If atomic ops and/or numeric limits are OS-specific rather than
	# CPU-specifc, set those here too.
	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
	case "${host_os}" in
	aix4.[3456789]* \| aix[56789]*)
	# We set os_include_dir to os/aix only on AIX 4.3 and newer, but
	# os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
	# explicitly duplicate the directory for 4.[<3].
	os_include_dir="os/aix"
	atomicity_dir="os/aix"
	OPT_LDFLAGS="-Wl,-G"
	;;
	aix4.*)
	os_include_dir="os/generic"
	atomicity_dir="os/aix"
	;;
	aix*)
	os_include_dir="os/generic"
	atomicity_dir="cpu/generic"
	;;
	bsd*)
	# Plain BSD attempts to share FreeBSD files.
	os_include_dir="os/bsd/freebsd"
	;;
	cygwin*)
	os_include_dir="os/newlib"
	;;
	djgpp) # leading * picks up "msdosdjgpp"
	os_include_dir="os/djgpp"
	;;
	freebsd*)
	os_include_dir="os/bsd/freebsd"
	;;
	gnu* \| linux* \| kfreebsd-gnu \| knetbsd-gnu)
	os_include_dir="os/gnu-linux"
	;;
	hpux*)
	os_include_dir="os/hpux"
	;;
	irix[1-6] \| irix[1-5].* \| irix6.[0-4]*)
	# This is known to work on at least IRIX 5.2 and 6.3.
	os_include_dir="os/irix/irix5.2"
	atomicity_dir=os/irix
	atomic_word_dir=os/irix
	;;
	irix6.5*)
	os_include_dir="os/irix/irix6.5"
	atomicity_dir=os/irix
	atomic_word_dir=os/irix
	;;
	mingw32*)
	os_include_dir="os/mingw32"
	;;
	netbsd*)
	os_include_dir="os/bsd/netbsd"
	;;
	qnx6.[12]*)
	os_include_dir="os/qnx/qnx6.1"
	c_model=c
	;;
	solaris2)
	# This too-vague configuration does not provide enough information
	# to select a ctype include, and thus os_include_dir is a crap shoot.
	echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
	exit 1;
	;;
	solaris2.5 \| solaris2.5.[0-9])
	os_include_dir="os/solaris/solaris2.5"
	;;
	solaris2.6)
	os_include_dir="os/solaris/solaris2.6"
	;;
	solaris2.[789] \| solaris2.1[0-9])
	os_include_dir="os/solaris/solaris2.7"
	;;
	tpf)
	os_include_dir="os/tpf"
	;;
	vxworks)
	os_include_dir="os/vxworks"
	;;
	windiss*)
	os_include_dir="os/windiss"
	;;
	*)
	os_include_dir="os/generic"
	;;
	esac


	# Set any OS-dependent and CPU-dependent bits.
	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
	case "${host}" in
	alpha--freebsd5*)
	abi_baseline_pair="alpha-freebsd5"
	;;
	arm--linux*)
	abi_baseline_pair="arm-linux-gnu"
	;;
	i86--freebsd4*)
	abi_baseline_pair="i386-freebsd4"
	;;
	i86--freebsd5*)
	abi_baseline_pair="i386-freebsd5"
	;;
	mips--linux*)
	atomicity_dir="cpu/mips"
	abi_baseline_pair="mips-linux-gnu"
	cpu_include_dir="cpu/mips"
	;;
	s390--linux)
	abi_baseline_pair="s390-linux-gnu"
	;;
	s390x--linux)
	abi_baseline_pair="s390x-linux-gnu"
	;;
	sparc--freebsd5*)
	abi_baseline_pair="sparc-freebsd5"
	;;
	x86_64--linux)
	abi_baseline_pair="x86_64-linux-gnu"
	;;
	esac