304 lines
8.5 KiB
Plaintext
304 lines
8.5 KiB
Plaintext
# configure.host
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#
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# This shell script handles all host based configuration for libstdc++.
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# It sets various shell variables based on the the host and the
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# configuration options. You can modify this shell script without needing
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# to rerun autoconf/aclocal/etc. This file is "sourced" not executed.
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#
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# You should read docs/html/17_intro/porting.* to make sense of this file.
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#
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#
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# It uses the following shell variables as set by config.guess:
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# host The configuration host (full CPU-vendor-OS triplet)
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# host_cpu The configuration host CPU
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# host_os The configuration host OS
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#
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#
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# It sets the following shell variables:
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#
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# cpu_include_dir CPU-specific directory, defaults to cpu/generic
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# if cpu/host_cpu doesn't exist. This is not used
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# directly, but sets the default for others.
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#
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# os_include_dir OS-specific directory, defaults to os/generic.
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#
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# c_model the "C" header model, defaults to c_std.
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#
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# c_compatibility if "C" compatibility headers are necessary,
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# defaults to no.
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#
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# abi_baseline_pair directory name for ABI compat testing,
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# defaults to host_cpu-host_os (as per config.guess)
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#
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# abi_tweaks_dir location of cxxabi_tweaks.h,
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# defaults to cpu_include_dir
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#
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# atomicity_dir location of atomicity.h,
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# defaults to cpu_include_dir
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#
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# atomic_word_dir location of atomic_word.h
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# defaults to generic.
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#
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# cpu_defines_dir location of cpu_defines.h
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# defaults to generic.
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#
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# It possibly modifies the following variables:
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#
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# OPT_LDFLAGS extra flags to pass when linking the library, of
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# the form '-Wl,blah'
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# (defaults to empty in acinclude.m4)
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#
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# port_specific_symbol_files
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# whitespace-seperated list of files containing
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# additional symbols to export from the shared
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# library, when symbol versioning is in use
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#
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#
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# If the defaults will not work for your platform, you need only change the
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# variables that won't work, i.e., you do not need to explicitly set a
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# working variable to its default. Most hosts only need to change the two
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# *_include_dir variables.
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# DEFAULTS
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# Try to guess a default cpu_include_dir based on the name of the CPU. We
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# cannot do this for os_include_dir; there are too many portable operating
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# systems out there. :-)
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c_model=c_std
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c_compatibility=no
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atomic_word_dir=cpu/generic
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cpu_defines_dir=cpu/generic
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# HOST-SPECIFIC OVERRIDES
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# Set any CPU-dependent bits.
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# Here we override defaults and catch more general cases due to naming
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# conventions (e.g., chip_name* to catch all variants).
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# THIS TABLE IS SORTED. KEEP IT THAT WAY.
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case "${host_cpu}" in
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alpha*)
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try_cpu=alpha
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;;
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arm* | xscale | ep9312)
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try_cpu=arm
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;;
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i[567]86 | x86_64)
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try_cpu=i486
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;;
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hppa*)
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try_cpu=hppa
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;;
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mips*)
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# NB: cpu/mips/atomicity.h needs MIPS II or above.
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# Of course, there is no sane way to test for this, no ABI macro,
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# and no consistent host_cpu name differentiation. Therefore, only
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# use it where it is known to be safe, ie it runs linux (see below).
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try_cpu=generic
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;;
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m680[246]0)
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try_cpu=m68k
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;;
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powerpc* | rs6000)
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try_cpu=powerpc
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;;
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s390x)
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try_cpu=s390
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;;
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sparc* | ultrasparc)
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try_cpu=sparc
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;;
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*)
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if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
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try_cpu=${host_cpu}
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else
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try_cpu=generic
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fi
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;;
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esac
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# Set specific CPU overrides for atomic_word_dir. Most can just use generic.
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# THIS TABLE IS SORTED. KEEP IT THAT WAY.
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case "${host_cpu}" in
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cris*)
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atomic_word_dir=cpu/cris
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;;
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sparc* | ultrasparc)
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atomic_word_dir=cpu/sparc
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;;
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esac
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# Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
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# THIS TABLE IS SORTED. KEEP IT THAT WAY.
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case "${host_cpu}" in
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powerpc* | rs6000)
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cpu_defines_dir=cpu/powerpc
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;;
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esac
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# Now look for the file(s) usually tied to a CPU model, and make
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# default choices for those if they haven't been explicitly set
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# already.
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cpu_include_dir=cpu/${try_cpu}
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abi_baseline_pair=${try_cpu}-${host_os}
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unset try_cpu
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if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
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atomicity_dir=$cpu_include_dir
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else
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atomicity_dir="cpu/generic"
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fi
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if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
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abi_tweaks_dir=$cpu_include_dir
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else
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abi_tweaks_dir="cpu/generic"
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fi
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# Set any OS-dependent bits.
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# Set the os_include_dir.
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# Set c_model, c_compatibility here.
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# If atomic ops and/or numeric limits are OS-specific rather than
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# CPU-specifc, set those here too.
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# THIS TABLE IS SORTED. KEEP IT THAT WAY.
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case "${host_os}" in
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aix4.[3456789]* | aix[56789]*)
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# We set os_include_dir to os/aix only on AIX 4.3 and newer, but
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# os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
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# explicitly duplicate the directory for 4.[<3].
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os_include_dir="os/aix"
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atomicity_dir="os/aix"
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atomic_word_dir="os/aix"
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OPT_LDFLAGS="-Wl,-G"
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;;
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aix4.*)
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os_include_dir="os/generic"
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atomicity_dir="os/aix"
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atomic_word_dir="os/aix"
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;;
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aix*)
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os_include_dir="os/generic"
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atomicity_dir="cpu/generic"
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;;
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bsd*)
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# Plain BSD attempts to share FreeBSD files.
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os_include_dir="os/bsd/freebsd"
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;;
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cygwin*)
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os_include_dir="os/newlib"
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;;
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darwin | darwin[1-7] | darwin[1-7].*)
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# On Darwin, performance is improved if libstdc++ is single-module.
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# Up to at least 10.3.7, -flat_namespace is required for proper
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# treatment of coalesced symbols.
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OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module -Wl,-flat_namespace"
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os_include_dir="os/bsd/darwin"
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;;
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darwin[89] | darwin[89].* | darwin[1-9][0-9]* )
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# On Darwin, performance is improved if libstdc++ is single-module,
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# and on 8+ compatibility is better if not -flat_namespace.
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OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module"
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os_include_dir="os/bsd/darwin"
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;;
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*djgpp*) # leading * picks up "msdosdjgpp"
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os_include_dir="os/djgpp"
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;;
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freebsd*)
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os_include_dir="os/bsd/freebsd"
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;;
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gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
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os_include_dir="os/gnu-linux"
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;;
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hpux*)
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os_include_dir="os/hpux"
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;;
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irix[1-6] | irix[1-5].* | irix6.[0-4]*)
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# This is known to work on at least IRIX 5.2 and 6.3.
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os_include_dir="os/irix/irix5.2"
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atomicity_dir=os/irix
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atomic_word_dir=os/irix
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;;
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irix6.5*)
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os_include_dir="os/irix/irix6.5"
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atomicity_dir=os/irix
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atomic_word_dir=os/irix
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;;
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mingw32*)
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os_include_dir="os/mingw32"
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;;
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netbsd*)
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os_include_dir="os/bsd/netbsd"
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;;
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qnx6.[12]*)
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os_include_dir="os/qnx/qnx6.1"
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c_model=c
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;;
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solaris2)
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# This too-vague configuration does not provide enough information
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# to select a ctype include, and thus os_include_dir is a crap shoot.
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echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
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exit 1
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;;
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solaris2.5 | solaris2.5.[0-9])
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os_include_dir="os/solaris/solaris2.5"
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;;
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solaris2.6)
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os_include_dir="os/solaris/solaris2.6"
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;;
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solaris2.[789] | solaris2.1[0-9])
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os_include_dir="os/solaris/solaris2.7"
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;;
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tpf)
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os_include_dir="os/tpf"
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;;
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vxworks)
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os_include_dir="os/vxworks"
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;;
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windiss*)
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os_include_dir="os/windiss"
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;;
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*)
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os_include_dir="os/generic"
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;;
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esac
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# Set any OS-dependent and CPU-dependent bits.
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# THIS TABLE IS SORTED. KEEP IT THAT WAY.
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case "${host}" in
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alpha*-*-freebsd5*)
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abi_baseline_pair="alpha-freebsd5"
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;;
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arm*-*-linux*)
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abi_baseline_pair="arm-linux-gnu"
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;;
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i*86-*-freebsd4*)
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abi_baseline_pair="i386-freebsd4"
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;;
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i*86-*-freebsd5*)
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abi_baseline_pair="i386-freebsd5"
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;;
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mips*-*-linux*)
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atomicity_dir="cpu/mips"
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abi_baseline_pair="mips-linux-gnu"
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cpu_include_dir="cpu/mips"
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;;
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powerpc*-*-darwin*)
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port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"
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;;
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powerpc64-*-linux*)
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abi_baseline_pair="powerpc64-linux-gnu"
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;;
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s390-*-linux*)
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abi_baseline_pair="s390-linux-gnu"
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;;
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s390x-*-linux*)
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abi_baseline_pair="s390x-linux-gnu"
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;;
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sparc*-*-freebsd5*)
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abi_baseline_pair="sparc-freebsd5"
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;;
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x86_64-*-linux*)
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abi_baseline_pair="x86_64-linux-gnu"
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;;
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esac
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