#! /bin/sh
#
# $NetBSD: mkhdr.sh,v 1.2 2008/05/24 04:29:06 tnn Exp $
#

[ "${CC}" = "" ] && CC="cc"
CPP="${CC} -E"

# Prints the full absolute pathname to the file that is included by doing
# #include <file.h>.
real_header() {
	echo "#include <$1>" | ${CPP} - 2> /dev/null |\
		awk -F\" '/^\# 1 "\// {if (!done) {print $2; done=1; }}'
}

# Find the real header path
real_hdr="`real_header $1`"
[ "${real_hdr}" = "" ] && real_hdr="stdio.h"
# Preprocess the input header. Substitute the real header location and
# remove empty lines afterwards.
${CPP} - | sed -e "s,@real_header@,${real_hdr}," -e 's/^#.*//' -e 's/^@/#/' | grep -v '^$'