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114 lines
3.4 KiB
Makefile
114 lines
3.4 KiB
Makefile
# SPDX-License-Identifier: BSD-2-Clause
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#
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# $Id: dirdeps-options.mk,v 1.22 2024/02/17 17:26:57 sjg Exp $
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#
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# @(#) Copyright (c) 2018-2022, Simon J. Gerraty
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#
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# This file is provided in the hope that it will
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# be of use. There is absolutely NO WARRANTY.
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# Permission to copy, redistribute or otherwise
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# use this file is hereby granted provided that
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# the above copyright notice and this notice are
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# left intact.
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#
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# Please send copies of changes and bug-fixes to:
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# sjg@crufty.net
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#
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##
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#
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# This makefile is used to deal with optional DIRDEPS.
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#
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# It is to be included by Makefile.depend.options in a
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# directory which has DIRDEPS affected by optional features.
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# Makefile.depend.options should set DIRDEPS_OPTIONS and
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# may also set specific DIRDEPS.* for those options.
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#
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# If a Makefile.depend.options file exists, it will be included by
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# dirdeps.mk and meta.autodep.mk
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#
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# We include local.dirdeps-options.mk which may also define DIRDEPS.*
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# for options.
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#
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# Thus a directory, that is affected by an option FOO would have
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# a Makefile.depend.options that sets
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# DIRDEPS_OPTIONS= FOO
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# It can also set either/both of
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# DIRDEPS.FOO.yes
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# DIRDEPS.FOO.no
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# to whatever applies for that dir, or it can rely on globals
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# set in local.dirdeps-options.mk
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# Either way, we will .undef DIRDEPS.* when done.
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#
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# In some cases the value of MK_FOO might depend on TARGET_SPEC
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# so we qualify MK_FOO with .${TARGET_SPEC} and each component
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# TARGET_SPEC_VAR (in reverse order) before using MK_FOO.
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#
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# Because Makefile.depend.options are processed at both level 0 (when
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# computing DIRDEPS to build) and higher (when updating
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# Makefile.depend* after successful build), it is important that
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# all references to TARGET_SPEC_VARs should use the syntax
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# ${DEP_${TARGET_SPEC_VAR}:U${TARGET_SPEC_VAR}} to ensure correct
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# behavior.
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#
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# This should have been set by Makefile.depend.options
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# before including us
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DIRDEPS_OPTIONS ?=
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# pickup any DIRDEPS.* we need
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.-include <local.dirdeps-options.mk>
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.if ${.MAKE.LEVEL} == 0
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# :U below avoids potential errors when we :=
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# some options can depend on TARGET_SPEC!
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DIRDEPS_OPTIONS_QUALIFIER_LIST ?= \
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${DEP_RELDIR} \
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${DEP_TARGET_SPEC:U${TARGET_SPEC}} \
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${TARGET_SPEC_VARSr:U${TARGET_SPEC_VARS}:@v@${DEP_$v:U${$v}}@}
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# note that we need to include $o in the variable _o$o
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# to ensure correct evaluation.
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.for o in ${DIRDEPS_OPTIONS}
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.undef _o$o
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.undef _v$o
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.for x in ${DIRDEPS_OPTIONS_QUALIFIER_LIST:S,^,${DEP_RELDIR}.,} \
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${DIRDEPS_OPTIONS_QUALIFIER_LIST}
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#.info MK_$o.$x=${MK_$o.$x:Uundefined}
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.if defined(MK_$o.$x)
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_o$o ?= MK_$o.$x
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_v$o ?= ${MK_$o.$x}
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.endif
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.endfor
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_v$o ?= ${MK_$o}
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.if ${_debug_reldir:U0}
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.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}
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.endif
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DIRDEPS += ${DIRDEPS.$o.${_v$o:U}:U}
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.endfor
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DIRDEPS := ${DIRDEPS:O:u}
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.if ${_debug_reldir:U0}
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.info ${DEP_RELDIR:U${RELDIR}}: DIRDEPS=${DIRDEPS}
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.endif
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# avoid cross contamination
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.for o in ${DIRDEPS_OPTIONS}
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.undef DIRDEPS.$o.yes
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.undef DIRDEPS.$o.no
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.undef _o$o
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.undef _v$o
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.endfor
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.else
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# whether options are enabled or not,
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# we want to filter out the relevant DIRDEPS.*
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# we should only be included by meta.autodep.mk
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# if dependencies are to be updated
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.for o in ${DIRDEPS_OPTIONS}
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.for d in ${DIRDEPS.$o.yes} ${DIRDEPS.$o.no}
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.if exists(${SRCTOP}/$d)
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GENDIRDEPS_FILTER += N$d*
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.elif exists(${SRCTOP}/${d:R})
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GENDIRDEPS_FILTER += N${d:R}*
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.endif
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.endfor
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.endfor
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.endif
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