1# $Id: sys.dependfile.mk,v 1.9 2020/08/19 17:51:53 sjg Exp $ 2# 3# @(#) Copyright (c) 2012, 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# This only makes sense in meta mode. 17# This allows a mixture of auto generated as well as manually edited 18# dependency files, which can be differentiated by their names. 19# As per dirdeps.mk we only require: 20# 1. a common prefix 21# 2. that machine specific files end in .${MACHINE} 22# 23# The .MAKE.DEPENDFILE_PREFERENCE below is an example. 24 25# All depend file names should start with this 26.MAKE.DEPENDFILE_PREFIX ?= Makefile.depend 27 28.if !empty(.MAKE.DEPENDFILE) && \ 29 ${.MAKE.DEPENDFILE:M${.MAKE.DEPENDFILE_PREFIX}*} == "" 30# let us do our thing below... 31.undef .MAKE.DEPENDFILE 32.endif 33 34# The order of preference: we will use the first one of these we find. 35# It usually makes sense to order from most specific to least. 36.MAKE.DEPENDFILE_PREFERENCE ?= \ 37 ${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX}.${MACHINE} \ 38 ${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX} 39 40# Normally the 1st entry is our default choice 41# Another useful default is ${.MAKE.DEPENDFILE_PREFIX} 42.MAKE.DEPENDFILE_DEFAULT ?= ${.MAKE.DEPENDFILE_PREFERENCE:[1]} 43 44_e := ${.MAKE.DEPENDFILE_PREFERENCE:@m@${exists($m):?$m:}@} 45.if !empty(_e) 46.MAKE.DEPENDFILE := ${_e:[1]} 47.elif ${.MAKE.DEPENDFILE_PREFERENCE:M*${MACHINE}} != "" && ${.MAKE.DEPENDFILE_DEFAULT:E} != ${MACHINE} 48# MACHINE specific depend files are supported, but *not* default. 49# If any already exist, we should follow suit. 50_aml = ${ALL_MACHINE_LIST:Uarm amd64 i386 powerpc:N${MACHINE}} ${MACHINE} 51# make sure we restore MACHINE 52_m := ${MACHINE} 53_e := ${_aml:@MACHINE@${.MAKE.DEPENDFILE_PREFERENCE:@m@${exists($m):?$m:}@}@} 54MACHINE := ${_m} 55.if !empty(_e) 56.MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_PREFERENCE:M*${MACHINE}:[1]} 57.endif 58.endif 59.MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_DEFAULT} 60