# configure.host
#
# This shell script handles all host based configuration for libstdc++.
-# It sets various shell variables based on the the host and the
+# It sets various shell variables based on 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.
#
#
# os_include_dir OS-specific directory, defaults to os/generic.
#
-# c_model the "C" header model, defaults to c_std.
+# c_model the "C" header model, defaults to c_global.
#
# 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_baseline_subdir_switch
+# g++ switch to determine ABI baseline subdir for
+# multilibbed targets,
+# defaults to --print-multi-directory
+#
# abi_tweaks_dir location of cxxabi_tweaks.h,
# defaults to cpu_include_dir
#
# atomic_word_dir location of atomic_word.h
# defaults to generic.
#
+# atomic_flags extra flags to pass to use atomic instructions
+# defaults to nothing.
+#
# cpu_defines_dir location of cpu_defines.h
# defaults to generic.
#
+# cpu_opt_bits_random path name of random.h containing CPU-specific
+# optimizations
+#
+# cpu_opt_ext_random path name of random.h containing CPU-specific
+# optimizations for extensions
+#
+# error_constants_dir location of error_constants.h
+# defaults to os/generic.
+#
# It possibly modifies the following variables:
#
# OPT_LDFLAGS extra flags to pass when linking the library, of
# (defaults to empty in acinclude.m4)
#
# port_specific_symbol_files
-# whitespace-seperated list of files containing
+# whitespace-separated list of files containing
# additional symbols to export from the shared
# library, when symbol versioning is in use
#
+# tmake_file A list of machine-description-specific
+# makefile fragments.
+#
#
# 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
# 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_model=c_global
c_compatibility=no
atomic_word_dir=cpu/generic
-cpu_defines_dir=cpu/generic
+atomic_flags=""
+atomicity_dir="cpu/generic"
+cpu_defines_dir="cpu/generic"
+try_cpu=generic
+abi_baseline_subdir_switch=--print-multi-directory
+abi_tweaks_dir="cpu/generic"
+error_constants_dir="os/generic"
+tmake_file=
# 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).
+# Provide a way to funnel exotic flavors and prefixed/postfixed chip
+# variants into the established source config/cpu/* sub-directories.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${host_cpu}" in
alpha*)
try_cpu=alpha
;;
- arm* | xscale | ep9312)
+ arm*)
try_cpu=arm
;;
+ crisv32)
+ try_cpu=cris
+ ;;
i[567]86 | x86_64)
try_cpu=i486
;;
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
+ try_cpu=mips
;;
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=${host_cpu}
- else
- try_cpu=generic
fi
- ;;
esac
-# Set specific CPU overrides for atomic_word_dir. Most can just use generic.
+
+# Now look for the file(s) usually tied to a CPU model, and make
+# default choices for those if they haven't been explicitly set
+# already.
+cpu_include_dir=cpu/${try_cpu}
+
+
+# Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${host_cpu}" in
- cris*)
- atomic_word_dir=cpu/cris
+ arm*)
+ cpu_defines_dir=cpu/arm
;;
- sparc* | ultrasparc)
- atomic_word_dir=cpu/sparc
+ powerpc* | rs6000)
+ cpu_defines_dir=cpu/powerpc
;;
esac
-# Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
+
+# Set specific CPU overrides for atomic_word_dir and atomic_flags.
+# Most can just use generic.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${host_cpu}" in
- powerpc* | rs6000)
- cpu_defines_dir=cpu/powerpc
+ cris*)
+ atomic_word_dir=cpu/cris
+ ;;
+ i[4567]86 | x86_64)
+ atomic_flags="-march=native"
+ ;;
+ sparc* | ultrasparc)
+ atomic_word_dir=cpu/sparc
+ atomic_flags="-mcpu=v9"
;;
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/${try_cpu}
-abi_baseline_pair=${try_cpu}-${host_os}
-unset try_cpu
+# Set specific CPU overrides for atomicity_dir.
+# This can be over-ridden in GLIBCXX_ENABLE_ATOMIC_BUILTINS.
+# THIS TABLE IS SORTED. KEEP IT THAT WAY.
if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
atomicity_dir=$cpu_include_dir
-else
- atomicity_dir="cpu/generic"
fi
+
if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
abi_tweaks_dir=$cpu_include_dir
-else
- abi_tweaks_dir="cpu/generic"
fi
+
+# Set directory with CPU-specific optimization
+cpu_opt_dir=${cpu_include_dir}/opt
+test -d ${glibcxx_srcdir}/config/${cpu_include_dir}/opt ||
+cpu_opt_dir=cpu/generic/opt
+# For each header with CPU-specific optimizations check whether it
+# exists in ${cpu_opt_dir}. If not, point the variable at the
+# appropriate file in the generic directory.
+cpu_opt_ext_random=${cpu_opt_dir}/ext/opt_random.h
+test -f ${glibcxx_srcdir}/config/${cpu_opt_ext_random} ||
+cpu_opt_ext_random=cpu/generic/opt/ext/opt_random.h
+
+cpu_opt_bits_random=${cpu_opt_dir}/bits/opt_random.h
+test -f ${glibcxx_srcdir}/config/${cpu_opt_ext_random} ||
+cpu_opt_ext_random=cpu/generic/opt/bits/opt_random.h
+
+
# Set any OS-dependent bits.
# Set the os_include_dir.
+# Set the error_costants_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 "${host_os}" in
- aix4.[3456789]* | aix[56789]*)
- # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
- # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
- # explicitly duplicate the directory for 4.[<3].
+ aix[56789]*)
+ # Newer versions of AIX only support PowerPC architecture, so use
+ # atomic instructions directly.
os_include_dir="os/aix"
- atomicity_dir="os/aix"
- atomic_word_dir="os/aix"
- OPT_LDFLAGS="-Wl,-G"
- ;;
- aix4.*)
- os_include_dir="os/generic"
- atomicity_dir="os/aix"
- atomic_word_dir="os/aix"
+ tmake_file="os/aix/t-aix"
;;
aix*)
os_include_dir="os/generic"
;;
cygwin*)
os_include_dir="os/newlib"
+ OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
;;
- darwin | darwin[1-7] | darwin[1-7].*)
- # On Darwin, performance is improved if libstdc++ is single-module.
- # Up to at least 10.3.7, -flat_namespace is required for proper
- # treatment of coalesced symbols.
+ darwin[4-7] | darwin[4-7].*)
+ # For earlier Darwin, performance is improved if libstdc++ is
+ # single-module. Up to at least 10.3.7, -flat_namespace is required
+ # for proper treatment of coalesced symbols.
OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module -Wl,-flat_namespace"
os_include_dir="os/bsd/darwin"
;;
- darwin[89] | darwin[89].* | darwin[1-9][0-9]* )
- # On Darwin, performance is improved if libstdc++ is single-module,
- # and on 8+ compatibility is better if not -flat_namespace.
+ darwin8 | darwin8.* )
+ # For 8+ compatibility is better if not -flat_namespace.
OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module"
+ case "${host_cpu}" in
+ i[34567]86 | x86_64)
+ OPTIMIZE_CXXFLAGS="${OPTIMIZE_CXXFLAGS} -fvisibility-inlines-hidden"
+ ;;
+ esac
+ os_include_dir="os/bsd/darwin"
+ ;;
+ darwin*)
+ # Post Darwin8, defaults should be sufficient.
os_include_dir="os/bsd/darwin"
;;
*djgpp*) # leading * picks up "msdosdjgpp"
os_include_dir="os/djgpp"
+ error_constants_dir="os/djgpp"
+ ;;
+ dragonfly*)
+ os_include_dir="os/bsd/dragonfly"
;;
freebsd*)
os_include_dir="os/bsd/freebsd"
;;
- gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
+ linux-musl*)
+ os_include_dir="os/generic"
+ ;;
+ gnu* | linux* | kfreebsd*-gnu | uclinux*)
if [ "$uclibc" = "yes" ]; then
os_include_dir="os/uclibc"
+ elif [ "$bionic" = "yes" ]; then
+ os_include_dir="os/bionic"
else
os_include_dir="os/gnu-linux"
fi
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"
+ case "$host" in
+ *-w64-*)
+ os_include_dir="os/mingw32-w64"
+ error_constants_dir="os/mingw32-w64"
+ ;;
+ *)
+ os_include_dir="os/mingw32"
+ error_constants_dir="os/mingw32"
+ ;;
+ esac
+ OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
;;
netbsd*)
os_include_dir="os/bsd/netbsd"
;;
+ openbsd*)
+ os_include_dir="os/bsd/openbsd"
+ ;;
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
+ rtems*)
+ # Use libatomic if necessary and avoid libstdc++ specific atomicity support
+ atomicity_dir="cpu/generic/atomicity_builtins"
;;
- 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"
+ solaris2*)
+ os_include_dir="os/solaris"
;;
tpf)
os_include_dir="os/tpf"
;;
- vxworks)
+ vxworks*)
os_include_dir="os/vxworks"
;;
- windiss*)
- os_include_dir="os/windiss"
- ;;
*)
os_include_dir="os/generic"
;;
# Set any OS-dependent and CPU-dependent bits.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${host}" in
- alpha*-*-freebsd5*)
- abi_baseline_pair="alpha-freebsd5"
- ;;
- arm*-*-linux*)
- abi_baseline_pair="arm-linux-gnu"
- ;;
- i*86-*-freebsd4*)
- abi_baseline_pair="i386-freebsd4"
- ;;
- i*86-*-freebsd5*)
- abi_baseline_pair="i386-freebsd5"
- ;;
- mips*-*-linux*)
- atomicity_dir="cpu/mips"
- abi_baseline_pair="mips-linux-gnu"
- cpu_include_dir="cpu/mips"
- ;;
+ loongarch*)
+ tmake_file="cpu/loongarch/t-loongarch"
+ ;;
+ *-*-linux* | *-*-uclinux*)
+ case "${host_cpu}" in
+ i[567]86)
+ abi_baseline_pair=i486-linux-gnu
+ ;;
+ mips64*)
+ abi_baseline_pair=mips64-linux-gnu
+ ;;
+ powerpc64le*)
+ abi_baseline_pair=powerpc64le-linux-gnu
+ ;;
+ powerpc64*)
+ abi_baseline_pair=powerpc64-linux-gnu
+ ;;
+ s390)
+ abi_baseline_pair=s390-linux-gnu
+ ;;
+ s390x)
+ abi_baseline_pair=s390x-linux-gnu
+ ;;
+ sparc64)
+ abi_baseline_pair=sparc64-linux-gnu
+ ;;
+ x86_64)
+ abi_baseline_pair=x86_64-linux-gnu
+ ;;
+ *)
+ if test $try_cpu = generic; then
+ try_abi_cpu=$host_cpu
+ else
+ try_abi_cpu=$try_cpu
+ fi
+ if test -d ${glibcxx_srcdir}/config/abi/post/${try_abi_cpu}-linux-gnu; then
+ abi_baseline_pair=${try_abi_cpu}-linux-gnu
+ fi
+ esac
+ case "${host}" in
+ arm*-*-linux-* | arm*-*-uclinuxfdpiceabi)
+ port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
+ ;;
+ esac
+ ;;
+ arm*-*-freebsd*)
+ port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
+ ;;
powerpc*-*-darwin*)
port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"
;;
- powerpc64-*-linux*)
- abi_baseline_pair="powerpc64-linux-gnu"
- ;;
- 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"
+ *-*-solaris2*)
+ abi_baseline_pair=solaris
+ case "${host_cpu}" in
+ i?86 | x86_64)
+ abi_baseline_pair=i386-${abi_baseline_pair}
+ ;;
+ sparc*)
+ abi_baseline_pair=sparc-${abi_baseline_pair}
+ ;;
+ esac
+ abi_baseline_subdir_switch=--print-multi-os-directory
;;
esac
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