# 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_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. # 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 # 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). # 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=${host_cpu} else try_cpu=generic fi ;; esac # Set specific CPU overrides for atomic_word_dir. Most can just use generic. # THIS TABLE IS SORTED. KEEP IT THAT WAY. case "${host_cpu}" in cris*) atomic_word_dir=cpu/cris ;; sparc* | ultrasparc) atomic_word_dir=cpu/sparc ;; esac # 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 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=$cpu_include_dir else abi_tweaks_dir="cpu/generic" fi # Set any OS-dependent bits. # Set the os_include_dir. # Set c_model, c_compatibility here. # If atomic ops and/or numeric limits are OS-specific rather than # CPU-specifc, set those here too. # THIS TABLE IS SORTED. KEEP IT THAT WAY. case "${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" 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" ;; 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" os_include_dir="os/bsd/darwin" ;; *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 # 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" ;; 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" ;; esac