gcc/boehm-gc/configure.host

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# configure.host
# This shell script handles all host based configuration for the garbage
# collector.
# 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.
# This shell script should be invoked as
# . configure.host
# If it encounters an error, it will exit with a message.
# It uses the following shell variables:
# host The configuration host
# host_cpu The configuration host CPU
# target_optspace --enable-target-optspace ("yes", "no", "")
# GCC should be "yes" if using gcc
# It sets the following shell variables:
# gc_cflags Special CFLAGS to use when building
# gc_use_mmap Set to "yes" on platforms where mmap should be used instead
# of sbrk. This will define USE_MMAP.
gc_cflags=""
gc_use_mmap=
# We should set -fexceptions if we are using gcc and might be used
# inside something like gcj. This is the zeroth approximation:
if test :"$GCC": = :yes: ; then
gc_cflags="${gc_cflags} -fexceptions"
else
case "$host" in
hppa*-*-hpux* )
if test :$GCC: != :"yes": ; then
gc_cflags="${gc_flags} +ESdbgasm"
fi
# :TODO: actaully we should check using Autoconf if
# the compiler supports this option.
;;
esac
fi
case "${host}" in
*-linux*|*-kfreebsd-gnu*|*-gnu*)
gc_use_mmap=yes
;;
esac
case "${target_optspace}:${host}" in
yes:*)
gc_cflags="${gc_cflags} -Os"
;;
:m32r-* | :d10v-* | :d30v-*)
gc_cflags="${gc_cflags} -Os"
;;
no:* | :*)
# Nothing.
;;
esac
# Set any host dependent compiler flags.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${host}" in
mips-tx39-*|mipstx39-unknown-*)
gc_cflags="${gc_cflags} -G 0"
;;
*)
;;
esac