mk/bsd.makevars.mk

   1 # $NetBSD: bsd.makevars.mk,v 1.4 2006/07/10 22:59:27 jlam Exp $
   2 #
   3 # This Makefile fragment is included by bsd.prefs.mk to set all of
   4 # the variables saved through MAKEVARS.  Typical usage is:
   5 #
   6 # .include "../../mk/bsd.prefs.mk"
   7 #
   8 # .if !defined(EXPENSIVE_VAR)
   9 # EXPENSIVE_VAR!=       ( ... an expensive computation ... )
  10 # .endif
  11 # MAKEVARS+=    EXPENSIVE_VAR
  12 #
  13 # This causes EXPENSIVE_VAR to be computed, then subsequently stored in
  14 # the variable cache file.  The next time through, EXPENSIVE_VAR is
  15 # set by bsd.makevars.mk, which avoids running the expensive computation
  16 # again.
  17 #
  18 # The cache files are created as we pass through each phase of the build,
  19 # and we only include the latest cache file that was created.
  20 #
  21
  22 _ALL_PHASES=            fetch tools extract patch                       \
  23                         wrapper configure build stage-install package
  24 _REV_ALL_PHASES=        package stage-install build configure wrapper   \
  25                         patch extract tools fetch
  26
  27 # Try including the *.makevars.mk files in reverse order so that the
  28 # latest file is included and no more.  We check for _MAKEVARS_MK since
  29 # all of the *.makevars.mk files define this symbol at the top of the
  30 # file.
  31 #
  32 .for _phase_ in ${_REV_ALL_PHASES}
  33 _MAKEVARS_MK.${_phase_}=        ${WRKDIR}/.${_phase_}_makevars.mk
  34 .  if !target(${_phase_}-vars)
  35 ${_phase_}-vars: ${_MAKEVARS_MK.${_phase_}}
  36 .  endif
  37 .  if !defined(_MAKEVARS_MK)
  38 .    sinclude "${_MAKEVARS_MK.${_phase_}}"
  39 .  endif
  40 .endfor