39 lines
1.3 KiB
Makefile
39 lines
1.3 KiB
Makefile
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# $Id: sys.dependfile.mk,v 1.3 2012/04/25 15:45:04 sjg Exp $
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#
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# @(#) Copyright (c) 2012, 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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# This only makes sense in meta mode.
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# This allows a mixture of auto generated as well as manually edited
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# dependency files, which can be differentiated by their names.
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# As per dirdeps.mk we only require:
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# 1. a common prefix
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# 2. that machine specific files end in .${MACHINE}
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#
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# The .MAKE.DEPENDFILE_PREFERENCE below is an example.
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# All depend file names should start with this
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.MAKE.DEPENDFILE_PREFIX ?= Makefile.depend
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# The order of preference: we will use the first one of these we find
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# otherwise the 1st entry will be used by default.
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.MAKE.DEPENDFILE_PREFERENCE ?= \
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${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX}.${MACHINE} \
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${.CURDIR}/${.MAKE.DEPENDFILE_PREFIX}
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_e := ${.MAKE.DEPENDFILE_PREFERENCE:@m@${exists($m):?$m:}@}
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.if !empty(_e)
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.MAKE.DEPENDFILE := ${_e:[1]}
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.endif
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.MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_PREFERENCE:[1]}
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