Blame sysinfo/host/host.sh

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