. ./redoconf.rc

# replace the placeholder for this function with
# one that will save help messages for later.
HELP="configure.help.new"
rm -f "$HELP"
echo '# Automatically generated by redoconf/_all.rc.od - do not edit' >"$HELP"
helpmsg() {
	printf '%-11s  %s\n' "$1" "$2" >>"$HELP"
	rc_hook "$1"
}

# Remember initial set of keys provided by ./configure
orig_keys=""
rc_hook() {
	contains_line "$orig_keys" "$1" || orig_keys="$orig_keys$NL$1"
}

# Include the rest of the necessary .rc files
keys=""
rc_hook() {
	contains_line "$new_keys" "$1" || new_keys="$new_keys$NL$1"
}
allrc=
if [ -e "$S/all.rc.od" ]; then
	allrc=all.rc
else
	allrc=
	redo-ifcreate "$S/all.rc.od"
fi
rc_include rc/_init.rc rc/CC.rc rc/zdefs.rc $allrc

rc_helpmsg PREFIX "Change installation prefix (usually /usr/local)"

IFS="$NL"
unused=
for d in $orig_keys; do
	if ! contains_line "$new_keys" "$d"; then
		unused=1
		xecho "Error: '$d' was given to ./configure but not used." >&2
	fi
done
[ -z "$unused" ] || exit 1

rc_save

# Now that all the rc files have run, update $S/configure.help with the
# newly-generated help text, so it's available to new users.
# Even if multiple output dirs are building at once, this replaces the
# file atomically, so it should be safe.
mv "$HELP" "$S/configure.help"