# 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.
-
-# This shell script should be invoked as
-# . configure.host
-# If it encounters an error, it will exit with a message.
+# 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 not used
+# directly, but sets the default for others.
+#
+# 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)
+#
+# abi_tweaks_dir location of cxxabi_tweaks.h,
+# defaults to cpu_include_dir
+#
+# 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.
-# It uses the following shell variables:
-# host The configuration host
-# host_cpu The configuration host CPU
-# target_optspace --enable-target-optspace ("yes", "no", "")
-# It sets the following shell variables:
-# glibcpp_cflags Special CFLAGS to use when building
-# glibcpp_cxxflags Special CXXFLAGS to use when building
+# 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
-glibcpp_cflags=
-glibcpp_cxxflags=
+# 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).
-AM_RUNTESTFLAGS=
+# THIS TABLE IS SORTED. KEEP IT THAT WAY.
+case "${host_cpu}" in
+ alpha*)
+ try_cpu=alpha
+ ;;
+ arm* | xscale | ep9312)
+ try_cpu=arm
+ ;;
+ 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 -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
+ try_cpu=${host_cpu}
+ else
+ try_cpu=generic
+ fi
+ ;;
+esac
-# Set any host dependent compiler flags.
+# Set specific CPU overrides for atomic_word_dir. Most can just use generic.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
+case "${host_cpu}" in
+ cris*)
+ atomic_word_dir=cpu/cris
+ ;;
+ sparc* | ultrasparc)
+ atomic_word_dir=cpu/sparc
+ ;;
+esac
-echo "$target"
+# Now look for the file(s) usually tied to a CPU model, and make
+# default choices for those if they haven't been explicitly set
+# already.
+cpu_include_dir=cpu/${try_cpu}
+abi_baseline_pair=${try_cpu}-${host_os}
+unset try_cpu
-DIVIDESPEC=-fuse-divide-subroutine
+if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
+ atomicity_dir=$cpu_include_dir
+else
+ atomicity_dir="cpu/generic"
+fi
-case "${host}" in
- i686-*|i586-*)
- ;;
- sparc-*)
- ;;
+if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
+ abi_tweaks_dir=$cpu_include_dir
+else
+ abi_tweaks_dir="cpu/generic"
+fi
+
+# Set any OS-dependent bits.
+# Set the os_include_dir.
+# Set c_model, c_compatibility here.
+# If atomic ops and/or numeric limits are OS-specific rather than
+# CPU-specifc, set those here too.
+# THIS TABLE IS SORTED. KEEP IT THAT WAY.
+case "${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
-glibcpp_cflags="${glibcpp_cflags} ${libgcj_flags}"
-glibcpp_cxxflags="${glibcpp_cxxflags} ${libgcj_flags}"
+
+# Set any OS-dependent and CPU-dependent bits.
+# THIS TABLE IS SORTED. KEEP IT THAT WAY.
+case "${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"
+ ;;
+ sparc*-*-freebsd5*)
+ abi_baseline_pair="sparc-freebsd5"
+ ;;
+ x86_64-*-linux*)
+ abi_baseline_pair="x86_64-linux-gnu"
+ ;;
+esac
OSDN Git Service
