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|
# configure.target
#
# This shell script handles all target based configuration for libstdc++.
# It sets various shell variables based on the the target 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:
# target The configuration target (full CPU-vendor-OS triplet)
# target_cpu The configuration target CPU
# target_os The configuration target OS
#
#
# It sets the following shell variables:
#
# cpu_include_dir CPU-specific directory, defaults to cpu/generic
# if cpu/target_cpu doesn't exist. This is
# used to set ATOMICITYH.
#
# os_include_dir OS-specific directory, defaults to os/generic.
#
# c_model the model to use for "C" headers, 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 target (as per config.guess)
#
# ATOMICITYH location of atomicity.h,
# defaults to cpu_include_dir
#
# 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)
#
#
# 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 targets 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
# TARGET-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 "${target_cpu}" in
alpha*)
try_cpu=alpha
;;
athlon* | i586 | i686 | i786 | x86_64)
try_cpu=i486
;;
hppa*)
try_cpu=hppa
;;
m680[246]0)
try_cpu=m68k
;;
powerpc* | rs6000)
try_cpu=powerpc
;;
s390x)
try_cpu=s390
;;
sparc* | ultrasparc)
try_cpu=sparc
;;
*)
if test -d ${glibcpp_srcdir}/config/cpu/${target_cpu}; then
try_cpu=${target_cpu}
else
try_cpu=generic
fi
;;
esac
# Now look for the file(s) usually tied to a CPU model, and make
# default choices for those if they haven't been explicitly set
# already.
cpu_include_dir="cpu/${try_cpu}"
ATOMICITYH=$cpu_include_dir
abi_baseline_pair=${try_cpu}-${host_os}
# Set any OS-dependent bits.
# Set the os_include_dir.
# Set c_model, c_compatibility here.
# If atomic ops and/or numeric limits are OS-specific rather than
# CPU-specifc, set those here too.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${target_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"
ATOMICITYH="os/aix"
OPT_LDFLAGS="-Wl,-G"
;;
aix4.*)
ATOMICITYH="os/aix"
;;
aix*)
ATOMICITYH="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*)
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"
ATOMICITYH=$os_include_dir
;;
irix6.5*)
os_include_dir="os/irix/irix6.5"
ATOMICITYH=$os_include_dir
;;
mingw32*)
os_include_dir="os/mingw32"
;;
netbsd*)
os_include_dir="os/bsd/netbsd"
;;
solaris2.5*)
os_include_dir="os/solaris/solaris2.5"
;;
solaris2.6*)
os_include_dir="os/solaris/solaris2.6"
;;
solaris2.[789]*)
os_include_dir="os/solaris/solaris2.7"
;;
windiss*)
os_include_dir="os/windiss"
;;
qnx6.[12]*)
os_include_dir="os/qnx/qnx6.1"
c_model=c
;;
*)
os_include_dir="os/generic"
;;
esac
# Set any OS-dependent and CPU-dependent bits.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${target}" in
mips*-*-linux*)
ATOMICITYH="cpu/mips"
;;
x86_64-*-linux*)
abi_baseline_pair="x86_64-linux-gnu"
;;
alpha*-*-freebsd5*)
abi_baseline_pair="alpha-freebsd5"
;;
i*86-*-freebsd4*)
abi_baseline_pair="i386-freebsd4"
;;
i*86-*-freebsd5*)
abi_baseline_pair="i386-freebsd5"
;;
sparc*-*-freebsd5*)
abi_baseline_pair="sparc-freebsd5"
;;
esac
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