# $NetBSD: buildcmd,v 1.10 2018/08/22 20:48:37 maya Exp $
#
# Copyright (c) 2004 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Johnny C. Lam.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

case $arg in
######################################################################
# Don't append empty arguments to the command line.
######################################################################
"")
	;;
######################################################################
# Reduce command length by not appending options that we've already
# seen.  We also ensure that all of the -l options come after the -L
# options, and suppress consecutive repeated libraries.
######################################################################
-[DILR]*|-Wl,-R*|-Wl,-*,/*)
	case $cmd in
	*" "$arg|*" "$arg" "*)
		;;
	*)
		shquote "$arg"; arg="$shquoted"
		cmd="$cmd $arg"
		;;
	esac
	;;
######################################################################
# Preserve the -Wl,-Bstatic / -Wl,-Bdynamic arguments, but also
# duplicate them into the list of libraries.  Someone may want to mix
# static and dynamic linking.
######################################################################
-Wl,-Bdynamic|-Wl,-Bstatic)
	shquote "$arg"; arg="$shquoted"
	cmd="$cmd $arg"
	libs="$libs $arg"
	;;
######################################################################
# Treat the '--as-needed' and '--no-as-needed' arguments to ld as if
# they are libraries so that they still surround the given library.
# WARNING: this may not work if the wrapper reorders libraries.
######################################################################
-l*|--as-needed|--no-as-needed)
	case $libs in
	*" "$arg)
		;;
	*)
		shquote "$arg"; arg="$shquoted"
		libs="$libs $arg"
		;;
	esac
	;;
######################################################################
# Append $arg to $cmd to build up the command line to be executed.
######################################################################
*)
	shquote "$arg"; arg="$shquoted"
	cmd="$cmd $arg"
	;;
esac