1# $Id: dirdeps-options.mk,v 1.18 2020/12/22 18:10:34 sjg Exp $
2#
3#	@(#) Copyright (c) 2018-2020, 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# In some cases the value of MK_FOO might depend on TARGET_SPEC
42# so we qualify MK_FOO with .${TARGET_SPEC} and each component
43# TARGET_SPEC_VAR (in reverse order) before using MK_FOO.
44#
45
46# This should have been set by Makefile.depend.options
47# before including us
48DIRDEPS_OPTIONS ?=
49
50# pickup any DIRDEPS.* we need
51.-include <local.dirdeps-options.mk>
52
53.if ${.MAKE.LEVEL} == 0
54# :U below avoids potential errors when we :=
55# some options can depend on TARGET_SPEC!
56DIRDEPS_OPTIONS_QUALIFIER_LIST ?= \
57	${DEP_TARGET_SPEC:U${TARGET_SPEC}} \
58	${TARGET_SPEC_VARSr:U${TARGET_SPEC_VARS}:@v@${DEP_$v:U${$v}}@}
59# note that we need to include $o in the variable _o$o
60# to ensure correct evaluation.
61.for o in ${DIRDEPS_OPTIONS}
62.undef _o$o
63.undef _v$o
64.for x in ${DIRDEPS_OPTIONS_QUALIFIER_LIST}
65.if defined(MK_$o.$x)
66_o$o ?= MK_$o.$x
67_v$o ?= ${MK_$o.$x}
68.endif
69.endfor
70_v$o ?= ${MK_$o}
71.if ${_debug_reldir:U0}
72.info ${DEP_RELDIR:U${RELDIR}}.${DEP_TARGET_SPEC:U${TARGET_SPEC}}: o=$o ${_o$o:UMK_$o}=${_v$o:U} DIRDEPS += ${DIRDEPS.$o.${_v$o:U}:U}
73.endif
74DIRDEPS += ${DIRDEPS.$o.${_v$o:U}:U}
75.endfor
76DIRDEPS := ${DIRDEPS:O:u}
77.if ${_debug_reldir:U0}
78.info ${DEP_RELDIR:U${RELDIR}}: DIRDEPS=${DIRDEPS}
79.endif
80# avoid cross contamination
81.for o in ${DIRDEPS_OPTIONS}
82.undef DIRDEPS.$o.yes
83.undef DIRDEPS.$o.no
84.undef _o$o
85.undef _v$o
86.endfor
87.else
88# whether options are enabled or not,
89# we want to filter out the relevant DIRDEPS.*
90# we should only be included by meta.autodep.mk
91# if dependencies are to be updated
92.for o in ${DIRDEPS_OPTIONS}
93.for d in ${DIRDEPS.$o.yes} ${DIRDEPS.$o.no}
94.if exists(${SRCTOP}/$d)
95GENDIRDEPS_FILTER += N$d*
96.elif exists(${SRCTOP}/${d:R})
97GENDIRDEPS_FILTER += N${d:R}*
98.endif
99.endfor
100.endfor
101.endif
102