1# $Id: sys.dependfile.mk,v 1.5 2013/03/08 00:59:21 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# The order of preference: we will use the first one of these we find. 29# It usually makes sense to order from most specific to least. 30.MAKE.DEPENDFILE_PREFERENCE ?= \ 31 ${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX}.${MACHINE} \ 32 ${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX} 33 34# Normally the 1st entry is our default choice 35# Another useful default is ${.MAKE.DEPENDFILE_PREFIX} 36.MAKE.DEPENDFILE_DEFAULT ?= ${.MAKE.DEPENDFILE_PREFERENCE:[1]} 37 38_e := ${.MAKE.DEPENDFILE_PREFERENCE:@m@${exists($m):?$m:}@} 39.if !empty(_e) 40.MAKE.DEPENDFILE := ${_e:[1]} 41.elif ${.MAKE.DEPENDFILE_PREFERENCE:M*${MACHINE}} != "" && ${.MAKE.DEPENDFILE_DEFAULT:E} != ${MACHINE} 42# MACHINE specific depend files are supported, but *not* default. 43# If any already exist, we should follow suit. 44_aml = ${ALL_MACHINE_LIST:Uarm amd64 i386 powerpc:N${MACHINE}} ${MACHINE} 45# MACHINE must be the last entry in _aml ;-) 46_e := ${_aml:@MACHINE@${.MAKE.DEPENDFILE_PREFERENCE:@m@${exists($m):?$m:}@}@} 47.if !empty(_e) 48.MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_PREFERENCE:M*${MACHINE}:[1]} 49.endif 50.endif 51.MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_DEFAULT} 52