1# $Id: dirdeps-options.mk,v 1.9 2018/09/20 00:07:19 sjg Exp $
2#
3#	@(#) Copyright (c) 2018, Simon J. Gerraty
4#
5#	This file is provided in the hope that it will
6#	be of use.  There is absolutely NO WARRANTY.
7#	Permission to copy, redistribute or otherwise
8#	use this file is hereby granted provided that
9#	the above copyright notice and this notice are
10#	left intact.
11#
12#	Please send copies of changes and bug-fixes to:
13#	sjg@crufty.net
14#
15
16##
17#
18# This makefile is used to deal with optional DIRDEPS.
19#
20# It is to be included by Makefile.depend.options in a
21# directory which has DIRDEPS affected by optional features.
22# Makefile.depend.options should set DIRDEPS_OPTIONS and
23# may also set specific DIRDEPS.* for those options.
24#
25# If a Makefile.depend.options file exists, it will be included by
26# dirdeps.mk and meta.autodep.mk
27#
28# We include local.dirdeps-options.mk which may also define DIRDEPS.*
29# for options.
30#
31# Thus a directory, that is affected by an option FOO would have
32# a Makefile.depend.options that sets
33# DIRDEPS_OPTIONS= FOO
34# It can also set either/both of
35# DIRDEPS.FOO.yes
36# DIRDEPS.FOO.no
37# to whatever applies for that dir, or it can rely on globals
38# set in local.dirdeps-options.mk
39# Either way, we will .undef DIRDEPS.* when done.
40
41# This should have been set by Makefile.depend.options
42# before including us
43DIRDEPS_OPTIONS ?=
44
45# pickup any DIRDEPS.* we need
46.-include <local.dirdeps-options.mk>
47
48.if ${.MAKE.LEVEL} == 0
49# :U below avoids potential errors when we :=
50.for o in ${DIRDEPS_OPTIONS:tu}
51DIRDEPS += ${DIRDEPS.$o.${MK_$o:U}:U}
52.endfor
53DIRDEPS := ${DIRDEPS:O:u}
54# avoid cross contamination
55.for o in ${DIRDEPS_OPTIONS:tu}
56.undef DIRDEPS.$o.yes
57.undef DIRDEPS.$o.no
58.endfor
59.else
60# whether options are enabled or not,
61# we want to filter out the relevant DIRDEPS.*
62# we should only be included by meta.autodep.mk
63# if dependencies are to be updated
64.for o in ${DIRDEPS_OPTIONS:tu}
65.for d in ${DIRDEPS.$o.yes} ${DIRDEPS.$o.no}
66.if exists(${SRCTOP}/$d)
67GENDIRDEPS_FILTER += N$d*
68.elif exists(${SRCTOP}/${d:R})
69GENDIRDEPS_FILTER += N${d:R}*
70.endif
71.endfor
72.endfor
73.endif
74