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# $Id: sys.dependfile.mk,v 1.3 2012/04/25 15:45:04 sjg Exp $
#
# @(#) Copyright (c) 2012, Simon J. Gerraty
#
# This file is provided in the hope that it will
# be of use. There is absolutely NO WARRANTY.
# Permission to copy, redistribute or otherwise
# use this file is hereby granted provided that
# the above copyright notice and this notice are
# left intact.
#
# Please send copies of changes and bug-fixes to:
# sjg@crufty.net
#
# This only makes sense in meta mode.
# This allows a mixture of auto generated as well as manually edited
# dependency files, which can be differentiated by their names.
# As per dirdeps.mk we only require:
# 1. a common prefix
# 2. that machine specific files end in .${MACHINE}
#
# The .MAKE.DEPENDFILE_PREFERENCE below is an example.
# All depend file names should start with this
.MAKE.DEPENDFILE_PREFIX ?= Makefile.depend
# The order of preference: we will use the first one of these we find
# otherwise the 1st entry will be used by default.
.MAKE.DEPENDFILE_PREFERENCE ?= \
${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX}.${MACHINE} \
${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX}
_e := ${.MAKE.DEPENDFILE_PREFERENCE:@m@${exists($m):?$m:}@}
.if !empty(_e)
.MAKE.DEPENDFILE := ${_e:[1]}
.endif
.MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_PREFERENCE:[1]}
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