| # 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 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_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_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. |
| # |
| # atomic_flags extra flags to pass to use atomic instructions |
| # defaults to nothing. |
| # |
| # cpu_defines_dir location of cpu_defines.h |
| # defaults to generic. |
| # |
| # |
| # 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 |
| # 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_global |
| c_compatibility=no |
| atomic_word_dir=cpu/generic |
| atomic_flags="" |
| atomicity_dir="cpu/generic" |
| cpu_defines_dir="cpu/generic" |
| try_cpu=generic |
| abi_tweaks_dir="cpu/generic" |
| error_constants_dir="os/generic" |
| |
| # HOST-SPECIFIC OVERRIDES |
| # Set any CPU-dependent bits. |
| |
| # 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*) |
| try_cpu=arm |
| ;; |
| crisv32) |
| try_cpu=cris |
| ;; |
| i[567]86 | x86_64) |
| try_cpu=i486 |
| ;; |
| hppa*) |
| try_cpu=hppa |
| ;; |
| mep*) |
| EXTRA_CXX_FLAGS=-mm |
| try_cpu=generic |
| ;; |
| mips*) |
| try_cpu=mips |
| ;; |
| powerpc* | rs6000) |
| try_cpu=powerpc |
| ;; |
| sparc* | ultrasparc) |
| try_cpu=sparc |
| ;; |
| *) |
| if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then |
| try_cpu=${host_cpu} |
| fi |
| esac |
| |
| |
| # Now look for the file(s) usually tied to a CPU model, and make |
| # default choices for those if they haven't been explicitly set |
| # already. |
| cpu_include_dir=cpu/${try_cpu} |
| |
| |
| # Set specific CPU overrides for cpu_defines_dir. Most can just use generic. |
| # THIS TABLE IS SORTED. KEEP IT THAT WAY. |
| case "${host_cpu}" in |
| powerpc* | rs6000) |
| cpu_defines_dir=cpu/powerpc |
| ;; |
| esac |
| |
| |
| # Set specific CPU overrides for atomic_word_dir and atomic_flags. |
| # Most can just use generic. |
| # THIS TABLE IS SORTED. KEEP IT THAT WAY. |
| case "${host_cpu}" in |
| alpha*) |
| atomic_word_dir=cpu/alpha |
| ;; |
| cris*) |
| atomic_word_dir=cpu/cris |
| ;; |
| ia64) |
| atomic_word_dir=cpu/ia64 |
| ;; |
| i[4567]86 | x86_64) |
| atomic_flags="-march=native" |
| ;; |
| powerpc* | rs6000) |
| atomic_word_dir=cpu/powerpc |
| ;; |
| sparc* | ultrasparc) |
| atomic_word_dir=cpu/sparc |
| atomic_flags="-mcpu=v9" |
| ;; |
| esac |
| |
| |
| # 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 |
| fi |
| |
| |
| if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then |
| abi_tweaks_dir=$cpu_include_dir |
| fi |
| |
| |
| # Set any OS-dependent bits. |
| # Set the os_include_dir. |
| # Set the error_costants_dir. |
| # Set c_model, c_compatibility here. |
| # If atomic ops and/or numeric limits are OS-specific rather than |
| # CPU-specifc, set those here too. |
| # THIS TABLE IS SORTED. KEEP IT THAT WAY. |
| case "${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]. |
| 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" |
| ;; |
| 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" |
| OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)" |
| ;; |
| darwin | darwin[1-7] | darwin[1-7].*) |
| # On Darwin, performance is improved if libstdc++ is single-module. |
| # Up to at least 10.3.7, -flat_namespace is required for proper |
| # treatment of coalesced symbols. |
| OPT_LDFLAGS="${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. |
| OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module" |
| case "${host_cpu}" in |
| i[34567]86 | x86_64) |
| OPTIMIZE_CXXFLAGS="${OPTIMIZE_CXXFLAGS} -fvisibility-inlines-hidden" |
| ;; |
| esac |
| os_include_dir="os/bsd/darwin" |
| ;; |
| *djgpp*) # leading * picks up "msdosdjgpp" |
| os_include_dir="os/djgpp" |
| error_constants_dir="os/djgpp" |
| ;; |
| freebsd*) |
| os_include_dir="os/bsd/freebsd" |
| ;; |
| gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) |
| if [ "$uclibc" = "yes" ]; then |
| os_include_dir="os/uclibc" |
| elif [ "$bionic" = "yes" ]; then |
| os_include_dir="os/bionic" |
| else |
| os_include_dir="os/gnu-linux" |
| fi |
| ;; |
| hpux*) |
| os_include_dir="os/hpux" |
| ;; |
| irix6.5*) |
| os_include_dir="os/irix/irix6.5" |
| atomicity_dir=os/irix |
| atomic_word_dir=os/irix |
| ;; |
| mingw32*) |
| os_include_dir="os/mingw32" |
| error_constants_dir="os/mingw32" |
| OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)" |
| ;; |
| netbsd*) |
| os_include_dir="os/bsd/netbsd" |
| ;; |
| osf*) |
| os_include_dir="os/generic" |
| # libstdc++.so relies on emutls on Tru64 UNIX, which only works with the |
| # real functions implemented in libpthread.so, not with the dummies in |
| # libgcc, so always pass -lpthread. |
| OPT_LDFLAGS="${OPT_LDFLAGS} -lpthread" |
| ;; |
| qnx6.[12]*) |
| os_include_dir="os/qnx/qnx6.1" |
| c_model=c |
| ;; |
| ros*) |
| os_include_dir="os/ros" |
| ;; |
| solaris2) |
| # This too-vague configuration does not provide enough information |
| # to select a ctype include, and thus os_include_dir is a crap shoot. |
| echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2 |
| exit 1 |
| ;; |
| solaris2.[89] | solaris2.1[0-9]) |
| os_include_dir="os/solaris/solaris2.7" |
| ;; |
| tpf) |
| os_include_dir="os/tpf" |
| ;; |
| vxworks) |
| os_include_dir="os/vxworks" |
| ;; |
| *) |
| os_include_dir="os/generic" |
| ;; |
| esac |
| |
| |
| # Set any OS-dependent and CPU-dependent bits. |
| # THIS TABLE IS SORTED. KEEP IT THAT WAY. |
| case "${host}" in |
| *-*-linux*) |
| case "${host_cpu}" in |
| i[567]86) |
| abi_baseline_pair=i486-linux-gnu |
| ;; |
| mips64*) |
| abi_baseline_pair=mips64-linux-gnu |
| ;; |
| powerpc64) |
| abi_baseline_pair=powerpc64-linux-gnu |
| ;; |
| s390) |
| abi_baseline_pair=s390-linux-gnu |
| ;; |
| s390x) |
| abi_baseline_pair=s390x-linux-gnu |
| ;; |
| x86_64) |
| abi_baseline_pair=x86_64-linux-gnu |
| ;; |
| *) |
| if test -d ${glibcxx_srcdir}/config/abi/post/${try_cpu}-linux-gnu; then |
| abi_baseline_pair=${try_cpu}-linux-gnu |
| fi |
| esac |
| case "${host}" in |
| arm*-*-linux-*eabi) |
| port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver" |
| ;; |
| esac |
| ;; |
| powerpc*-*-darwin*) |
| port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver" |
| ;; |
| *-*-solaris2.[89]) |
| abi_baseline_pair=solaris2.8 |
| ;; |
| *-*-solaris2.1[0-9]) |
| abi_baseline_pair=solaris2.10 |
| ;; |
| esac |
