1 # $Id: dirdeps-options.mk,v 1.21 2022/09/06 22:18:45 sjg Exp $
3 # @(#) Copyright (c) 2018-2022, Simon J. Gerraty
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
12 # Please send copies of changes and bug-fixes to:
18 # This makefile is used to deal with optional DIRDEPS.
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.
25 # If a Makefile.depend.options file exists, it will be included by
26 # dirdeps.mk and meta.autodep.mk
28 # We include local.dirdeps-options.mk which may also define DIRDEPS.*
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
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.
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.
45 # Because Makefile.depend.options are processed at both level 0 (when
46 # computing DIRDEPS to build) and higher (when updating
47 # Makefile.depend* after successful build), it is important that
48 # all references to TARGET_SPEC_VARs should use the syntax
49 # ${DEP_${TARGET_SPEC_VAR}:U${TARGET_SPEC_VAR}} to ensure correct
53 # This should have been set by Makefile.depend.options
57 # pickup any DIRDEPS.* we need
58 .-include <local.dirdeps-options.mk>
60 .if ${.MAKE.LEVEL} == 0
61 # :U below avoids potential errors when we :=
62 # some options can depend on TARGET_SPEC!
63 DIRDEPS_OPTIONS_QUALIFIER_LIST ?= \
65 ${DEP_TARGET_SPEC:U${TARGET_SPEC}} \
66 ${TARGET_SPEC_VARSr:U${TARGET_SPEC_VARS}:@v@${DEP_$v:U${$v}}@}
67 # note that we need to include $o in the variable _o$o
68 # to ensure correct evaluation.
69 .for o in ${DIRDEPS_OPTIONS}
72 .for x in ${DIRDEPS_OPTIONS_QUALIFIER_LIST:S,^,${DEP_RELDIR}.,} \
73 ${DIRDEPS_OPTIONS_QUALIFIER_LIST}
74 #.info MK_$o.$x=${MK_$o.$x:Uundefined}
81 .if ${_debug_reldir:U0}
82 .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}
84 DIRDEPS += ${DIRDEPS.$o.${_v$o:U}:U}
86 DIRDEPS := ${DIRDEPS:O:u}
87 .if ${_debug_reldir:U0}
88 .info ${DEP_RELDIR:U${RELDIR}}: DIRDEPS=${DIRDEPS}
90 # avoid cross contamination
91 .for o in ${DIRDEPS_OPTIONS}
98 # whether options are enabled or not,
99 # we want to filter out the relevant DIRDEPS.*
100 # we should only be included by meta.autodep.mk
101 # if dependencies are to be updated
102 .for o in ${DIRDEPS_OPTIONS}
103 .for d in ${DIRDEPS.$o.yes} ${DIRDEPS.$o.no}
104 .if exists(${SRCTOP}/$d)
105 GENDIRDEPS_FILTER += N$d*
106 .elif exists(${SRCTOP}/${d:R})
107 GENDIRDEPS_FILTER += N${d:R}*