contrib/bmake/mk/auto.dep.mk

   1 #
   2 # RCSid:
   3 #       $Id: auto.dep.mk,v 1.2 2010/04/19 17:37:19 sjg Exp $
   4 #
   5 #       @(#) Copyright (c) 2010, Simon J. Gerraty
   6 #
   7 #       This file is provided in the hope that it will
   8 #       be of use.  There is absolutely NO WARRANTY.
   9 #       Permission to copy, redistribute or otherwise
  10 #       use this file is hereby granted provided that
  11 #       the above copyright notice and this notice are
  12 #       left intact.
  13 #
  14 #       Please send copies of changes and bug-fixes to:
  15 #       sjg@crufty.net
  16 #
  17
  18 # This module provides automagic dependency generation along the
  19 # lines suggested in the GNU make.info
  20
  21 # set MKDEP=auto.dep and dep.mk will include us
  22
  23 # This version differs from autodep.mk, in that
  24 # we use ${.TARGET:T}.d rather than ${.TARGET:T:R}.d
  25 # this makes it simpler to get the args to -MF and -MT right
  26 # and ensure we can simply include all the .d files.
  27 #
  28 # However suffix rules do not work with something like .o.d so we
  29 # don't even try to handle 'make depend' gracefully.
  30 # dep.mk will handle that itself.
  31 #
  32 .if !target(__${.PARSEFILE}__)
  33 __${.PARSEFILE}__:
  34
  35 # this what bmake > 20100401 will look for
  36 .MAKE.DEPENDFILE ?= .depend
  37
  38 # set this to -MMD to ignore /usr/include
  39 # actually it ignores <> so may not be a great idea
  40 CFLAGS_MD ?= -MD
  41 # -MF etc not available on all gcc versions.
  42 CFLAGS_MF ?= -MF ${.TARGET:T}.d -MT ${.TARGET:T}
  43 CFLAGS += ${CFLAGS_MD} ${CFLAGS_MF}
  44 CXXFLAGS += ${CFLAGS_MD} ${CFLAGS_MF}
  45
  46 CLEANFILES += .depend ${.MAKE.DEPENDFILE} *.d
  47
  48 # skip generating dependfile for misc targets
  49 .if ${.TARGETS:Uall:M*all} != ""
  50 .END:   ${.MAKE.DEPENDFILE}
  51 .endif
  52
  53 # doing 'make depend' isn't a big win with this model
  54 .if !target(depend)
  55 depend: ${.MAKE.DEPENDFILE}
  56 .endif
  57
  58 # this is trivial
  59 ${.MAKE.DEPENDFILE}: ${OBJS} ${POBJS} ${SOBJS}
  60         -@for f in ${.ALLSRC:M*o:T:O:u:%=%.d}; do \
  61                 echo ".-include \"$$f\""; \
  62         done > $@
  63
  64 .endif