share/mk/sys.dependfile.mk

   1 # $Id: sys.dependfile.mk,v 1.8 2016/03/11 01:34:13 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:}@}@}
  54 MACHINE := ${_m}
  55 .if !empty(_e)
  56 .MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_PREFERENCE:M*${MACHINE}:[1]}
  57 .endif
  58 .endif
  59 .MAKE.DEPENDFILE ?= ${.MAKE.DEPENDFILE_DEFAULT}