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|
#!/bin/sh
error_msg()
{
echo $@ >&2
}
host_test()
{
mb_hdrdir=$(pwd)/build
mkdir -p $mb_hdrdir || exit 2
if [ x"$mb_compiler" = x ]; then
echo "config error: compiler not set."
exit 2
fi
$mb_compiler -dM -E - < /dev/null > /dev/null && return 0
error_msg "config error: invalid compiler."
exit 2
}
host_endian_h()
{
mb_header='endian.h'
rm -f "$mb_hdrdir"/$mb_header
# portable
$mb_compiler $mb_cflags \
--include=$mb_header -E - < /dev/null > /dev/null 2>/dev/null \
&& return 0
# non-portable
mb_hosthdr=
[ -z $mb_hosthdr ] && $mb_compiler $mb_cflags \
--include='sys/'$mb_header -E - < /dev/null > /dev/null 2>/dev/null \
&& mb_hosthdr='sys/'$mb_header
[ -z $mb_hosthdr ] && $mb_compiler $mb_cflags \
--include='machine/'$mb_header -E - < /dev/null > /dev/null 2>/dev/null \
&& mb_hosthdr='machine/'$mb_header
if [ x"$mb_hosthdr" = x ]; then
error_msg "config error: could not find an alternate <$mb_header>."
exit 2
fi
printf "#include <%s>\\n" $mb_hosthdr > "$mb_hdrdir"/$mb_header || exit 2
}
# one: args
for arg ; do
case "$arg" in
--help) usage
;;
--compiler=*)
mb_compiler=${arg#*=}
;;
--cflags=*)
mb_cflags=${arg#*=}
;;
*)
error_msg ${arg#}: "unsupported config argument."
exit 2
;;
esac
done
# two: test
host_test
# three: headers
host_endian_h
# all done
exit 0
|
