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