contrib/bmake/mk/meta.sys.mk

   1 # $Id: meta.sys.mk,v 1.29 2016/08/13 17:51:45 sjg Exp $
   2
   3 #
   4 #       @(#) Copyright (c) 2010, Simon J. Gerraty
   5 #
   6 #       This file is provided in the hope that it will
   7 #       be of use.  There is absolutely NO WARRANTY.
   8 #       Permission to copy, redistribute or otherwise
   9 #       use this file is hereby granted provided that
  10 #       the above copyright notice and this notice are
  11 #       left intact.
  12 #
  13 #       Please send copies of changes and bug-fixes to:
  14 #       sjg@crufty.net
  15 #
  16
  17 # include this if you want to enable meta mode
  18 # for maximum benefit, requires filemon(4) driver.
  19
  20 .if ${MAKE_VERSION:U0} > 20100901
  21 .if !target(.ERROR)
  22
  23 .-include <local.meta.sys.mk>
  24
  25 # absoulte path to what we are reading.
  26 _PARSEDIR = ${.PARSEDIR:tA}
  27
  28 .if !defined(SYS_MK_DIR)
  29 SYS_MK_DIR := ${_PARSEDIR}
  30 .endif
  31
  32 META_MODE += meta verbose
  33 .MAKE.MODE ?= ${META_MODE}
  34
  35 .if ${.MAKE.LEVEL} == 0
  36 _make_mode := ${.MAKE.MODE} ${META_MODE}
  37 .if ${_make_mode:M*read*} != "" || ${_make_mode:M*nofilemon*} != ""
  38 # tell everyone we are not updating Makefile.depend*
  39 UPDATE_DEPENDFILE = NO
  40 .export UPDATE_DEPENDFILE
  41 .endif
  42 .if ${UPDATE_DEPENDFILE:Uyes:tl} == "no" && !exists(/dev/filemon)
  43 # we should not get upset
  44 META_MODE += nofilemon
  45 .export META_MODE
  46 .endif
  47 .endif
  48
  49 .if !defined(NO_SILENT)
  50 .if ${MAKE_VERSION} > 20110818
  51 # only be silent when we have a .meta file
  52 META_MODE += silent=yes
  53 .else
  54 .SILENT:
  55 .endif
  56 .endif
  57
  58 # we use the pseudo machine "host" for the build host.
  59 # this should be taken care of before we get here
  60 .if ${OBJTOP:Ua} == ${HOST_OBJTOP:Ub}
  61 MACHINE = host
  62 .endif
  63
  64 .if ${.MAKE.LEVEL} == 0
  65 # it can be handy to know which MACHINE kicked off the build
  66 # for example, if using Makefild.depend for multiple machines,
  67 # allowing only MACHINE0 to update can keep things simple.
  68 MACHINE0 := ${MACHINE}
  69 .export MACHINE0
  70
  71 .if defined(PYTHON) && exists(${PYTHON})
  72 # we prefer the python version of this - it is much faster
  73 META2DEPS ?= ${.PARSEDIR}/meta2deps.py
  74 .else
  75 META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
  76 .endif
  77 META2DEPS := ${META2DEPS}
  78 .export META2DEPS
  79 .endif
  80
  81 MAKE_PRINT_VAR_ON_ERROR += \
  82         .ERROR_TARGET \
  83         .ERROR_META_FILE \
  84         .MAKE.LEVEL \
  85         MAKEFILE \
  86         .MAKE.MODE
  87
  88 .if !defined(SB) && defined(SRCTOP)
  89 SB = ${SRCTOP:H}
  90 .endif
  91 ERROR_LOGDIR ?= ${SB}/error
  92 meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log
  93
  94 # we are not interested in make telling us a failure happened elsewhere
  95 .ERROR: _metaError
  96 _metaError: .NOMETA .NOTMAIN
  97         -@[ "${.ERROR_META_FILE}" ] && { \
  98         grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \
  99         mkdir -p ${meta_error_log:H}; \
 100         cp ${.ERROR_META_FILE} ${meta_error_log}; \
 101         echo "ERROR: log ${meta_error_log}" >&2; }; :
 102
 103 .endif
 104
 105 META_COOKIE_TOUCH=
 106 # some targets need to be .PHONY in non-meta mode
 107 META_NOPHONY= .PHONY
 108 # Are we, after all, in meta mode?
 109 .if ${.MAKE.MODE:Uno:Mmeta*} != ""
 110 MKDEP_MK = meta.autodep.mk
 111
 112 .if ${.MAKE.MAKEFILES:M*sys.dependfile.mk} == ""
 113 # this does all the smarts of setting .MAKE.DEPENDFILE
 114 .-include <sys.dependfile.mk>
 115 # check if we got anything sane
 116 .if ${.MAKE.DEPENDFILE} == ".depend"
 117 .undef .MAKE.DEPENDFILE
 118 .endif
 119 .MAKE.DEPENDFILE ?= Makefile.depend
 120 .endif
 121
 122 # we can afford to use cookies to prevent some targets
 123 # re-running needlessly
 124 META_COOKIE_TOUCH= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET}}
 125 META_NOPHONY=
 126
 127 # some targets involve old pre-built targets
 128 # ignore mtime of shell
 129 # and mtime of makefiles does not matter in meta mode
 130 .MAKE.META.IGNORE_PATHS += \
 131         ${MAKEFILE} \
 132         ${SHELL} \
 133         ${SYS_MK_DIR}
 134
 135 .if ${UPDATE_DEPENDFILE:Uyes:tl} != "no"
 136 .if ${.MAKEFLAGS:Uno:M-k} != ""
 137 # make this more obvious
 138 .warning Setting UPDATE_DEPENDFILE=NO due to -k
 139 UPDATE_DEPENDFILE= NO
 140 .export UPDATE_DEPENDFILE
 141 .elif !exists(/dev/filemon)
 142 .error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded.
 143 .endif
 144 .endif
 145
 146 .if ${.MAKE.LEVEL} == 0
 147 # make sure dirdeps target exists and do it first
 148 all: dirdeps .WAIT
 149 dirdeps:
 150 .NOPATH: dirdeps
 151
 152 .if defined(ALL_MACHINES)
 153 # the first .MAIN: is what counts
 154 # by default dirdeps is all we want at level0
 155 .MAIN: dirdeps
 156 # tell dirdeps.mk what we want
 157 BUILD_AT_LEVEL0 = no
 158 .endif
 159 .if ${.TARGETS:Nall} == ""
 160 # it works best if we do everything via sub-makes
 161 BUILD_AT_LEVEL0 ?= no
 162 .endif
 163
 164 .endif
 165 .endif
 166 .endif