# 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.
-
-# This shell script should be invoked as
-# . configure.target
-# If it encounters an error, it will exit with a message.
-
-# It uses the following shell variables:
-# target The configuration target
+# 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
-# target_optspace --enable-target-optspace ("yes", "no", "")
+#
+#
+# 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_triplet 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.
-# It possibly modifies the following shell variables:
-# cpu_include_dir CPU-specific include directory, relative to srcdir
-# os_include_dir OS-specific include directory, relative to srcdir
+# 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. :-)
+abi_baseline_triplet=${target}
+c_model=c_std
+c_compatibility=no
+if test -d ${glibcpp_srcdir}/config/cpu/${target_cpu}; then
+ cpu_include_dir="cpu/${target_cpu}"
+else
+ cpu_include_dir="cpu/generic"
+fi
-# Set any CPU dependent compiler flags.
-# THIS TABLE IS SORTED. KEEP IT THAT WAY.
+# TARGET-SPECIFIC OVERRIDES
+# Set any CPU-dependent bits.
+# Here we override defaults and catch more general cases due to naming
+# conventions (e.g., chip_name* to catch all variants).
+# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${target_cpu}" in
alpha*)
- cpu_include_dir="config/cpu/alpha"
- ;;
- arm*)
- cpu_include_dir="config/cpu/arm"
- ;;
- ia64)
- cpu_include_dir="config/cpu/ia64"
+ cpu_include_dir="cpu/alpha"
;;
- i386)
- cpu_include_dir="config/cpu/i386"
+ athlon* | i586 | i686 | i786 | x86_64)
+ cpu_include_dir="cpu/i486"
;;
- i486 | i586 | i686 | i786)
- cpu_include_dir="config/cpu/i486"
+ hppa*)
+ cpu_include_dir="cpu/hppa"
;;
- powerpc | rs6000)
- cpu_include_dir="config/cpu/powerpc"
+ m680[246]0)
+ cpu_include_dir="cpu/m68k"
;;
- s390 | s390x)
- cpu_include_dir="config/cpu/s390"
+ powerpc* | rs6000)
+ cpu_include_dir="cpu/powerpc"
;;
- sparc64 | ultrasparc)
- cpu_include_dir="config/cpu/sparc/sparc64"
+ s390x)
+ cpu_include_dir="cpu/s390"
;;
- sparc*)
- cpu_include_dir="config/cpu/sparc/sparc32"
- ;;
- *)
- cpu_include_dir="config/cpu/generic"
+ sparc* | ultrasparc)
+ cpu_include_dir="cpu/sparc"
;;
esac
-# Set any OS dependent compiler flags.
-# THIS TABLE IS SORTED. KEEP IT THAT WAY.
+# 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_incdir_fullpath=${glibcpp_srcdir}/config/${cpu_include_dir}
+if test x${ATOMICITYH+set} != xset; then
+ if test -f ${_cpu_incdir_fullpath}/atomicity.h; then
+ ATOMICITYH=$cpu_include_dir
+ else
+ ATOMICITYH="cpu/generic"
+ fi
+fi
+unset _cpu_incdir_fullpath
+
+# 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]*)
- os_include_dir="config/os/aix"
+ # 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"
;;
- bsd* | freebsd* )
- os_include_dir="config/os/bsd/freebsd"
+ aix*)
+ ATOMICITYH="cpu/generic"
+ ;;
+ bsd*)
+ # Plain BSD attempts to share FreeBSD files.
+ os_include_dir="os/bsd/freebsd"
;;
cygwin*)
- os_include_dir="config/os/newlib"
+ os_include_dir="os/newlib"
+ ;;
+ *djgpp*) # leading * picks up "msdosdjgpp"
+ os_include_dir="os/djgpp"
+ ;;
+ freebsd*)
+ os_include_dir="os/bsd/freebsd"
+ # The FreeBSD ABI is expressed in the major version number only.
+ abi_baseline_triplet=`echo ${target} | sed 's,\(\.[0-9]*\)*$,,'`
+ ;;
+ gnu* | linux*)
+ os_include_dir="os/gnu-linux"
;;
- *djgpp*)
- os_include_dir="config/os/djgpp"
+ hpux*)
+ os_include_dir="os/hpux"
;;
- linux* | gnu*)
- os_include_dir="config/os/gnu-linux"
+ irix[1-6] | irix[1-5].* | irix6.[0-4]*)
+ # This is known to work on at least IRIX 5.2 and 6.3.
+ os_include_dir="os/irix/irix5.2"
+ ATOMICITYH=$os_include_dir
;;
- 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="config/os/irix/irix5.2"
- ;;
- irix6.5)
- os_include_dir="config/os/irix/irix6.5"
+ irix6.5*)
+ os_include_dir="os/irix/irix6.5"
+ ATOMICITYH=$os_include_dir
+ ;;
+ mingw32*)
+ os_include_dir="os/mingw32"
;;
netbsd*)
- os_include_dir="config/os/bsd/netbsd"
+ os_include_dir="os/bsd/netbsd"
;;
solaris2.5*)
- os_include_dir="config/os/solaris/solaris2.5"
+ os_include_dir="os/solaris/solaris2.5"
;;
solaris2.6*)
- os_include_dir="config/os/solaris/solaris2.6"
+ os_include_dir="os/solaris/solaris2.6"
+ ;;
+ solaris2.[78]*)
+ os_include_dir="os/solaris/solaris2.7"
;;
- solaris2.7* | solaris2.8*)
- os_include_dir="config/os/solaris/solaris2.7"
+ windiss*)
+ os_include_dir="os/windiss"
;;
- hpux)
- os_include_dir="config/os/hpux"
+ qnx6.[12]*)
+ os_include_dir="os/qnx/qnx6.1"
+ c_model=c
;;
*)
- os_include_dir="config/os/generic"
+ os_include_dir="os/generic"
;;
esac
-# Set any flags dependant on the full target triplet.
+# Set any OS-dependent and CPU-dependent bits.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
-
case "${target}" in
- *-*-aix[456789]*)
- # We set os_include_dir to config/os/aix only on AIX 4.3 and
- # newer, but config/os/aix/bits/atomicity.h works on earlier
- # versions of AIX 4.*, so we explicitly duplicate the directory
- # here, because os_include_dir.
- ATOMICITYH=config/os/aix
- ;;
- *-*-aix*)
- ATOMICITYH=config/cpu/generic
- ;;
- *-*-irix*)
- ATOMICITYH=$os_include_dir
- ;;
- *)
- ATOMICITYH=$cpu_include_dir
- ;;
-esac
-
-# Set LIMITSH to the directory where the configuration-dependent
-# limits.h can be found.
-# THIS TABLE IS SORTED. KEEP IT THAT WAY.
-
-case "${target}" in
- i?86-*-*)
- LIMITSH=config/cpu/i386
- ;;
- powerpc-*-*)
- LIMITSH=config/cpu/powerpc
- ;;
- *)
- LIMITSH=config/cpu/generic
- ;;
+ mips*-*-linux*)
+ ATOMICITYH="cpu/mips"
+ ;;
esac
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