share/mk/dirdeps.mk

   1 # $Id: dirdeps.mk,v 1.88 2017/04/24 20:34:59 sjg Exp $
   2
   3 # Copyright (c) 2010-2013, Juniper Networks, Inc.
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions
   8 # are met:
   9 # 1. Redistributions of source code must retain the above copyright
  10 #    notice, this list of conditions and the following disclaimer.
  11 # 2. Redistributions in binary form must reproduce the above copyright
  12 #    notice, this list of conditions and the following disclaimer in the
  13 #    documentation and/or other materials provided with the distribution.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 # Much of the complexity here is for supporting cross-building.
  28 # If a tree does not support that, simply using plain Makefile.depend
  29 # should provide sufficient clue.
  30 # Otherwise the recommendation is to use Makefile.depend.${MACHINE}
  31 # as expected below.
  32
  33 # Note: this file gets multiply included.
  34 # This is what we do with DIRDEPS
  35
  36 # DIRDEPS:
  37 #       This is a list of directories - relative to SRCTOP, it is
  38 #       normally only of interest to .MAKE.LEVEL 0.
  39 #       In some cases the entry may be qualified with a .<machine>
  40 #       or .<target_spec> suffix (see TARGET_SPEC_VARS below),
  41 #       for example to force building something for the pseudo
  42 #       machines "host" or "common" regardless of current ${MACHINE}.
  43 #
  44 #       All unqualified entries end up being qualified with .${TARGET_SPEC}
  45 #       and partially qualified (if TARGET_SPEC_VARS has multiple
  46 #       entries) are also expanded to a full .<target_spec>.
  47 #       The  _DIRDEP_USE target uses the suffix to set TARGET_SPEC
  48 #       correctly when visiting each entry.
  49 #
  50 #       The fully qualified directory entries are used to construct a
  51 #       dependency graph that will drive the build later.
  52 #
  53 #       Also, for each fully qualified directory target, we will search
  54 #       using ${.MAKE.DEPENDFILE_PREFERENCE} to find additional
  55 #       dependencies.  We use Makefile.depend (default value for
  56 #       .MAKE.DEPENDFILE_PREFIX) to refer to these makefiles to
  57 #       distinguish them from others.
  58 #
  59 #       Before each Makefile.depend file is read, we set
  60 #       DEP_RELDIR to be the RELDIR (path relative to SRCTOP) for
  61 #       its directory, and DEP_MACHINE etc according to the .<target_spec>
  62 #       represented by the suffix of the corresponding target.
  63 #
  64 #       Since each Makefile.depend file includes dirdeps.mk, this
  65 #       processing is recursive and results in .MAKE.LEVEL 0 learning the
  66 #       dependencies of the tree wrt the initial directory (_DEP_RELDIR).
  67 #
  68 # BUILD_AT_LEVEL0
  69 #       Indicates whether .MAKE.LEVEL 0 builds anything:
  70 #       if "no" sub-makes are used to build everything,
  71 #       if "yes" sub-makes are only used to build for other machines.
  72 #       It is best to use "no", but this can require fixing some
  73 #       makefiles to not do anything at .MAKE.LEVEL 0.
  74 #
  75 # TARGET_SPEC_VARS
  76 #       The default value is just MACHINE, and for most environments
  77 #       this is sufficient.  The _DIRDEP_USE target actually sets
  78 #       both MACHINE and TARGET_SPEC to the suffix of the current
  79 #       target so that in the general case TARGET_SPEC can be ignored.
  80 #
  81 #       If more than MACHINE is needed then sys.mk needs to decompose
  82 #       TARGET_SPEC and set the relevant variables accordingly.
  83 #       It is important that MACHINE be included in and actually be
  84 #       the first member of TARGET_SPEC_VARS.  This allows other
  85 #       variables to be considered optional, and some of the treatment
  86 #       below relies on MACHINE being the first entry.
  87 #       Note: TARGET_SPEC cannot contain any '.'s so the target
  88 #       triple used by compiler folk won't work (directly anyway).
  89 #
  90 #       For example:
  91 #
  92 #               # Always list MACHINE first,
  93 #               # other variables might be optional.
  94 #               TARGET_SPEC_VARS = MACHINE TARGET_OS
  95 #               .if ${TARGET_SPEC:Uno:M*,*} != ""
  96 #               _tspec := ${TARGET_SPEC:S/,/ /g}
  97 #               MACHINE := ${_tspec:[1]}
  98 #               TARGET_OS := ${_tspec:[2]}
  99 #               # etc.
 100 #               # We need to stop that TARGET_SPEC affecting any submakes
 101 #               # and deal with MACHINE=${TARGET_SPEC} in the environment.
 102 #               TARGET_SPEC =
 103 #               # export but do not track
 104 #               .export-env TARGET_SPEC
 105 #               .export ${TARGET_SPEC_VARS}
 106 #               .for v in ${TARGET_SPEC_VARS:O:u}
 107 #               .if empty($v)
 108 #               .undef $v
 109 #               .endif
 110 #               .endfor
 111 #               .endif
 112 #               # make sure we know what TARGET_SPEC is
 113 #               # as we may need it to find Makefile.depend*
 114 #               TARGET_SPEC = ${TARGET_SPEC_VARS:@v@${$v:U}@:ts,}
 115 #
 116 #       The following variables can influence the initial DIRDEPS
 117 #       computation with regard to the TARGET_SPECs that will be
 118 #       built.
 119 #       Most should also be considered by init.mk
 120 #
 121 #       ONLY_TARGET_SPEC_LIST
 122 #               Defines a list of TARGET_SPECs for which the current
 123 #               directory can be built.
 124 #               If ALL_MACHINES is defined, we build for all the
 125 #               TARGET_SPECs listed.
 126 #
 127 #       ONLY_MACHINE_LIST
 128 #               As for ONLY_TARGET_SPEC_LIST but only specifies
 129 #               MACHINEs.
 130 #
 131 #       NOT_TARGET_SPEC_LIST
 132 #               A list of TARGET_SPECs for which the current
 133 #               directory should not be built.
 134 #
 135 #       NOT_MACHINE_LIST
 136 #               A list of MACHINEs the current directory should not be
 137 #               built for.
 138 #
 139
 140 .if !target(bootstrap) && (make(bootstrap) || \
 141         make(bootstrap-this) || \
 142         make(bootstrap-recurse) || \
 143         make(bootstrap-empty))
 144 # disable most of below
 145 .MAKE.LEVEL = 1
 146 .endif
 147
 148 # touch this at your peril
 149 _DIRDEP_USE_LEVEL?= 0
 150 .if ${.MAKE.LEVEL} == ${_DIRDEP_USE_LEVEL}
 151 # only the first instance is interested in all this
 152
 153 .if !target(_DIRDEP_USE)
 154
 155 # do some setup we only need once
 156 _CURDIR ?= ${.CURDIR}
 157 _OBJDIR ?= ${.OBJDIR}
 158
 159 now_utc = ${%s:L:gmtime}
 160 .if !defined(start_utc)
 161 start_utc := ${now_utc}
 162 .endif
 163
 164 .if ${MAKEFILE:T} == ${.PARSEFILE} && empty(DIRDEPS) && ${.TARGETS:Uall:M*/*} != ""
 165 # This little trick let's us do
 166 #
 167 # mk -f dirdeps.mk some/dir.${TARGET_SPEC}
 168 #
 169 all:
 170 ${.TARGETS:Nall}: all
 171 DIRDEPS := ${.TARGETS:M*[/.]*}
 172 # so that -DNO_DIRDEPS works
 173 DEP_RELDIR := ${DIRDEPS:[1]:R}
 174 # this will become DEP_MACHINE below
 175 TARGET_MACHINE := ${DIRDEPS:[1]:E:C/,.*//}
 176 .if ${TARGET_MACHINE:N*/*} == ""
 177 TARGET_MACHINE := ${MACHINE}
 178 .endif
 179 # disable DIRDEPS_CACHE as it does not like this trick
 180 MK_DIRDEPS_CACHE = no
 181 .endif
 182
 183 # make sure we get the behavior we expect
 184 .MAKE.SAVE_DOLLARS = no
 185
 186 # make sure these are empty to start with
 187 _DEP_TARGET_SPEC =
 188
 189 # If TARGET_SPEC_VARS is other than just MACHINE
 190 # it should be set by sys.mk or similar by now.
 191 # TARGET_SPEC must not contain any '.'s.
 192 TARGET_SPEC_VARS ?= MACHINE
 193 # this is what we started with
 194 TARGET_SPEC = ${TARGET_SPEC_VARS:@v@${$v:U}@:ts,}
 195 # this is what we mostly use below
 196 DEP_TARGET_SPEC = ${TARGET_SPEC_VARS:S,^,DEP_,:@v@${$v:U}@:ts,}
 197 # make sure we have defaults
 198 .for v in ${TARGET_SPEC_VARS}
 199 DEP_$v ?= ${$v}
 200 .endfor
 201
 202 .if ${TARGET_SPEC_VARS:[#]} > 1
 203 # Ok, this gets more complex (putting it mildly).
 204 # In order to stay sane, we need to ensure that all the build_dirs
 205 # we compute below are fully qualified wrt DEP_TARGET_SPEC.
 206 # The makefiles may only partially specify (eg. MACHINE only),
 207 # so we need to construct a set of modifiers to fill in the gaps.
 208 .if ${MAKE_VERSION} >= 20170130
 209 _tspec_x := ${TARGET_SPEC_VARS:range}
 210 .elif ${TARGET_SPEC_VARS:[#]} > 10
 211 # seriously? better have jot(1) or equivalent to produce suitable sequence
 212 _tspec_x := ${${JOT:Ujot} ${TARGET_SPEC_VARS:[#]}:L:sh}
 213 .else
 214 # we can provide the sequence ourselves
 215 _tspec_x := ${1 2 3 4 5 6 7 8 9 10:L:[1..${TARGET_SPEC_VARS:[#]}]}
 216 .endif
 217 # this handles unqualified entries
 218 M_dep_qual_fixes = C;(/[^/.,]+)$$;\1.$${DEP_TARGET_SPEC};
 219 # there needs to be at least one item missing for these to make sense
 220 .for i in ${_tspec_x:[2..-1]}
 221 _tspec_m$i := ${TARGET_SPEC_VARS:[2..$i]:@w@[^,]+@:ts,}
 222 _tspec_a$i := ,${TARGET_SPEC_VARS:[$i..-1]:@v@$$$${DEP_$v}@:ts,}
 223 M_dep_qual_fixes += C;(\.${_tspec_m$i})$$;\1${_tspec_a$i};
 224 .endfor
 225 .else
 226 # A harmless? default.
 227 M_dep_qual_fixes = U
 228 .endif
 229
 230 .if !defined(.MAKE.DEPENDFILE_PREFERENCE)
 231 # .MAKE.DEPENDFILE_PREFERENCE makes the logic below neater?
 232 # you really want this set by sys.mk or similar
 233 .MAKE.DEPENDFILE_PREFERENCE = ${_CURDIR}/${.MAKE.DEPENDFILE:T}
 234 .if ${.MAKE.DEPENDFILE:E} == "${TARGET_SPEC}"
 235 .if ${TARGET_SPEC} != ${MACHINE}
 236 .MAKE.DEPENDFILE_PREFERENCE += ${_CURDIR}/${.MAKE.DEPENDFILE:T:R}.$${MACHINE}
 237 .endif
 238 .MAKE.DEPENDFILE_PREFERENCE += ${_CURDIR}/${.MAKE.DEPENDFILE:T:R}
 239 .endif
 240 .endif
 241
 242 _default_dependfile := ${.MAKE.DEPENDFILE_PREFERENCE:[1]:T}
 243 _machine_dependfiles := ${.MAKE.DEPENDFILE_PREFERENCE:T:M*${MACHINE}*}
 244
 245 # for machine specific dependfiles we require ${MACHINE} to be at the end
 246 # also for the sake of sanity we require a common prefix
 247 .if !defined(.MAKE.DEPENDFILE_PREFIX)
 248 # knowing .MAKE.DEPENDFILE_PREFIX helps
 249 .if !empty(_machine_dependfiles)
 250 .MAKE.DEPENDFILE_PREFIX := ${_machine_dependfiles:[1]:T:R}
 251 .else
 252 .MAKE.DEPENDFILE_PREFIX := ${_default_dependfile:T}
 253 .endif
 254 .endif
 255
 256
 257 # this is how we identify non-machine specific dependfiles
 258 N_notmachine := ${.MAKE.DEPENDFILE_PREFERENCE:E:N*${MACHINE}*:${M_ListToSkip}}
 259
 260 .endif                          # !target(_DIRDEP_USE)
 261
 262 # First off, we want to know what ${MACHINE} to build for.
 263 # This can be complicated if we are using a mixture of ${MACHINE} specific
 264 # and non-specific Makefile.depend*
 265
 266 # if we were included recursively _DEP_TARGET_SPEC should be valid.
 267 .if empty(_DEP_TARGET_SPEC)
 268 # we may or may not have included a dependfile yet
 269 .if defined(.INCLUDEDFROMFILE)
 270 _last_dependfile := ${.INCLUDEDFROMFILE:M${.MAKE.DEPENDFILE_PREFIX}*}
 271 .else
 272 _last_dependfile := ${.MAKE.MAKEFILES:M*/${.MAKE.DEPENDFILE_PREFIX}*:[-1]}
 273 .endif
 274 .if ${_debug_reldir:U0}
 275 .info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: _last_dependfile='${_last_dependfile}'
 276 .endif
 277
 278 .if empty(_last_dependfile) || ${_last_dependfile:E:${N_notmachine}} == ""
 279 # this is all we have to work with
 280 DEP_MACHINE = ${TARGET_MACHINE:U${MACHINE}}
 281 _DEP_TARGET_SPEC := ${DEP_TARGET_SPEC}
 282 .else
 283 _DEP_TARGET_SPEC = ${_last_dependfile:${M_dep_qual_fixes:ts:}:E}
 284 .endif
 285 .if !empty(_last_dependfile)
 286 # record that we've read dependfile for this
 287 _dirdeps_checked.${_CURDIR}.${TARGET_SPEC}:
 288 .endif
 289 .endif
 290
 291 # by now _DEP_TARGET_SPEC should be set, parse it.
 292 .if ${TARGET_SPEC_VARS:[#]} > 1
 293 # we need to parse DEP_MACHINE may or may not contain more info
 294 _tspec := ${_DEP_TARGET_SPEC:S/,/ /g}
 295 .for i in ${_tspec_x}
 296 DEP_${TARGET_SPEC_VARS:[$i]} := ${_tspec:[$i]}
 297 .endfor
 298 .for v in ${TARGET_SPEC_VARS:O:u}
 299 .if empty(DEP_$v)
 300 .undef DEP_$v
 301 .endif
 302 .endfor
 303 .else
 304 DEP_MACHINE := ${_DEP_TARGET_SPEC}
 305 .endif
 306
 307 # reset each time through
 308 _build_all_dirs =
 309
 310 # the first time we are included the _DIRDEP_USE target will not be defined
 311 # we can use this as a clue to do initialization and other one time things.
 312 .if !target(_DIRDEP_USE)
 313 # make sure this target exists
 314 dirdeps: beforedirdeps .WAIT
 315 beforedirdeps:
 316
 317 # We normally expect to be included by Makefile.depend.*
 318 # which sets the DEP_* macros below.
 319 DEP_RELDIR ?= ${RELDIR}
 320
 321 # this can cause lots of output!
 322 # set to a set of glob expressions that might match RELDIR
 323 DEBUG_DIRDEPS ?= no
 324
 325 # remember the initial value of DEP_RELDIR - we test for it below.
 326 _DEP_RELDIR := ${DEP_RELDIR}
 327
 328 .endif
 329
 330 # DIRDEPS_CACHE can be very handy for debugging.
 331 # Also if repeatedly building the same target,
 332 # we can avoid the overhead of re-computing the tree dependencies.
 333 MK_DIRDEPS_CACHE ?= no
 334 BUILD_DIRDEPS_CACHE ?= no
 335 BUILD_DIRDEPS ?= yes
 336
 337 .if ${MK_DIRDEPS_CACHE} == "yes"
 338 # this is where we will cache all our work
 339 DIRDEPS_CACHE ?= ${_OBJDIR:tA}/dirdeps.cache${.TARGETS:Nall:O:u:ts-:S,/,_,g:S,^,.,:N.}
 340 .endif
 341
 342 # pickup customizations
 343 # as below you can use !target(_DIRDEP_USE) to protect things
 344 # which should only be done once.
 345 .-include <local.dirdeps.mk>
 346
 347 .if !target(_DIRDEP_USE)
 348 # things we skip for host tools
 349 SKIP_HOSTDIR ?=
 350
 351 NSkipHostDir = ${SKIP_HOSTDIR:N*.host*:S,$,.host*,:N.host*:S,^,${SRCTOP}/,:${M_ListToSkip}}
 352
 353 # things we always skip
 354 # SKIP_DIRDEPS allows for adding entries on command line.
 355 SKIP_DIR += .host *.WAIT ${SKIP_DIRDEPS}
 356 SKIP_DIR.host += ${SKIP_HOSTDIR}
 357
 358 DEP_SKIP_DIR = ${SKIP_DIR} \
 359         ${SKIP_DIR.${DEP_TARGET_SPEC}:U} \
 360         ${TARGET_SPEC_VARS:@v@${SKIP_DIR.${DEP_$v}:U}@} \
 361         ${SKIP_DIRDEPS.${DEP_TARGET_SPEC}:U} \
 362         ${TARGET_SPEC_VARS:@v@${SKIP_DIRDEPS.${DEP_$v}:U}@}
 363
 364
 365 NSkipDir = ${DEP_SKIP_DIR:${M_ListToSkip}}
 366
 367 .if defined(NODIRDEPS) || defined(WITHOUT_DIRDEPS)
 368 NO_DIRDEPS =
 369 .elif defined(WITHOUT_DIRDEPS_BELOW)
 370 NO_DIRDEPS_BELOW =
 371 .endif
 372
 373 .if defined(NO_DIRDEPS)
 374 # confine ourselves to the original dir and below.
 375 DIRDEPS_FILTER += M${_DEP_RELDIR}*
 376 .elif defined(NO_DIRDEPS_BELOW)
 377 DIRDEPS_FILTER += M${_DEP_RELDIR}
 378 .endif
 379
 380 # this is what we run below
 381 DIRDEP_MAKE?= ${.MAKE}
 382
 383 # we suppress SUBDIR when visiting the leaves
 384 # we assume sys.mk will set MACHINE_ARCH
 385 # you can add extras to DIRDEP_USE_ENV
 386 # if there is no makefile in the target directory, we skip it.
 387 _DIRDEP_USE:    .USE .MAKE
 388         @for m in ${.MAKE.MAKEFILE_PREFERENCE}; do \
 389                 test -s ${.TARGET:R}/$$m || continue; \
 390                 echo "${TRACER}Checking ${.TARGET:R} for ${.TARGET:E} ..."; \
 391                 MACHINE_ARCH= NO_SUBDIR=1 ${DIRDEP_USE_ENV} \
 392                 TARGET_SPEC=${.TARGET:E} \
 393                 MACHINE=${.TARGET:E} \
 394                 ${DIRDEP_MAKE} -C ${.TARGET:R} || exit 1; \
 395                 break; \
 396         done
 397
 398 .ifdef ALL_MACHINES
 399 # this is how you limit it to only the machines we have been built for
 400 # previously.
 401 .if empty(ONLY_TARGET_SPEC_LIST) && empty(ONLY_MACHINE_LIST)
 402 .if !empty(ALL_MACHINE_LIST)
 403 # ALL_MACHINE_LIST is the list of all legal machines - ignore anything else
 404 _machine_list != cd ${_CURDIR} && 'ls' -1 ${ALL_MACHINE_LIST:O:u:@m@${.MAKE.DEPENDFILE:T:R}.$m@} 2> /dev/null; echo
 405 .else
 406 _machine_list != 'ls' -1 ${_CURDIR}/${.MAKE.DEPENDFILE_PREFIX}.* 2> /dev/null; echo
 407 .endif
 408 _only_machines := ${_machine_list:${NIgnoreFiles:UN*.bak}:E:O:u}
 409 .else
 410 _only_machines := ${ONLY_TARGET_SPEC_LIST:U} ${ONLY_MACHINE_LIST:U}
 411 .endif
 412
 413 .if empty(_only_machines)
 414 # we must be boot-strapping
 415 _only_machines := ${TARGET_MACHINE:U${ALL_MACHINE_LIST:U${DEP_MACHINE}}}
 416 .endif
 417
 418 .else                           # ! ALL_MACHINES
 419 # if ONLY_TARGET_SPEC_LIST or ONLY_MACHINE_LIST is set, we are limited to that.
 420 # Note that ONLY_TARGET_SPEC_LIST should be fully qualified.
 421 # if TARGET_MACHINE is set - it is really the same as ONLY_MACHINE_LIST
 422 # otherwise DEP_MACHINE is it - so DEP_MACHINE will match.
 423 _only_machines := ${ONLY_TARGET_SPEC_LIST:U:M${DEP_MACHINE},*}
 424 .if empty(_only_machines)
 425 _only_machines := ${ONLY_MACHINE_LIST:U${TARGET_MACHINE:U${DEP_MACHINE}}:M${DEP_MACHINE}}
 426 .endif
 427 .endif
 428
 429 .if !empty(NOT_MACHINE_LIST)
 430 _only_machines := ${_only_machines:${NOT_MACHINE_LIST:${M_ListToSkip}}}
 431 .endif
 432 .if !empty(NOT_TARGET_SPEC_LIST)
 433 # we must first qualify
 434 _dm := ${DEP_MACHINE}
 435 _only_machines := ${_only_machines:M*,*} ${_only_machines:N*,*:@DEP_MACHINE@${DEP_TARGET_SPEC}@:S,^,.,:${M_dep_qual_fixes:ts:}:O:u:S,^.,,}
 436 DEP_MACHINE := ${_dm}
 437 _only_machines := ${_only_machines:${NOT_TARGET_SPEC_LIST:${M_ListToSkip}}}
 438 .endif
 439 # clean up
 440 _only_machines := ${_only_machines:O:u}
 441
 442 # make sure we have a starting place?
 443 DIRDEPS ?= ${RELDIR}
 444 .endif                          # target
 445
 446 .if !defined(NO_DIRDEPS) && !defined(NO_DIRDEPS_BELOW)
 447 .if ${MK_DIRDEPS_CACHE} == "yes"
 448
 449 # just ensure this exists
 450 build-dirdeps:
 451
 452 M_oneperline = @x@\\${.newline} $$x@
 453
 454 .if ${BUILD_DIRDEPS_CACHE} == "no"
 455 .if !target(dirdeps-cached)
 456 # we do this via sub-make
 457 BUILD_DIRDEPS = no
 458
 459 # ignore anything but these
 460 .MAKE.META.IGNORE_FILTER = M*/${.MAKE.DEPENDFILE_PREFIX}*
 461
 462 dirdeps: dirdeps-cached
 463 dirdeps-cached: ${DIRDEPS_CACHE} .MAKE
 464         @echo "${TRACER}Using ${DIRDEPS_CACHE}"
 465         @MAKELEVEL=${.MAKE.LEVEL} ${.MAKE} -C ${_CURDIR} -f ${DIRDEPS_CACHE} \
 466                 dirdeps MK_DIRDEPS_CACHE=no BUILD_DIRDEPS=no
 467
 468 # these should generally do
 469 BUILD_DIRDEPS_MAKEFILE ?= ${MAKEFILE}
 470 BUILD_DIRDEPS_TARGETS ?= ${.TARGETS}
 471
 472 # we need the .meta file to ensure we update if
 473 # any of the Makefile.depend* changed.
 474 # We do not want to compare the command line though.
 475 ${DIRDEPS_CACHE}:       .META .NOMETA_CMP
 476         +@{ echo '# Autogenerated - do NOT edit!'; echo; \
 477         echo 'BUILD_DIRDEPS=no'; echo; \
 478         echo '.include <dirdeps.mk>'; \
 479         } > ${.TARGET}.new
 480         +@MAKELEVEL=${.MAKE.LEVEL} DIRDEPS_CACHE=${DIRDEPS_CACHE} \
 481         DIRDEPS="${DIRDEPS}" \
 482         TARGET_SPEC=${TARGET_SPEC} \
 483         MAKEFLAGS= ${.MAKE} -C ${_CURDIR} -f ${BUILD_DIRDEPS_MAKEFILE} \
 484         ${BUILD_DIRDEPS_TARGETS} BUILD_DIRDEPS_CACHE=yes \
 485         .MAKE.DEPENDFILE=.none \
 486         ${.MAKEFLAGS:tW:S,-D ,-D,g:tw:M*WITH*} \
 487         3>&1 1>&2 | sed 's,${SRCTOP},$${SRCTOP},g' >> ${.TARGET}.new && \
 488         mv ${.TARGET}.new ${.TARGET}
 489
 490 .endif
 491 .elif !target(_count_dirdeps)
 492 # we want to capture the dirdeps count in the cache
 493 .END: _count_dirdeps
 494 _count_dirdeps: .NOMETA
 495         @echo '.info $${.newline}$${TRACER}Makefiles read: total=${.MAKE.MAKEFILES:[#]} depend=${.MAKE.MAKEFILES:M*depend*:[#]} dirdeps=${.ALLTARGETS:M${SRCTOP}*:O:u:[#]}' >&3
 496
 497 .endif
 498 .elif !make(dirdeps) && !target(_count_dirdeps)
 499 beforedirdeps: _count_dirdeps
 500 _count_dirdeps: .NOMETA
 501         @echo "${TRACER}Makefiles read: total=${.MAKE.MAKEFILES:[#]} depend=${.MAKE.MAKEFILES:M*depend*:[#]} dirdeps=${.ALLTARGETS:M${SRCTOP}*:O:u:[#]} seconds=`expr ${now_utc} - ${start_utc}`"
 502
 503 .endif
 504 .endif
 505
 506 .if ${BUILD_DIRDEPS} == "yes"
 507 .if ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.${DEP_MACHINE}:L:M$x}@} != ""
 508 _debug_reldir = 1
 509 .else
 510 _debug_reldir = 0
 511 .endif
 512 .if ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.depend:L:M$x}@} != ""
 513 _debug_search = 1
 514 .else
 515 _debug_search = 0
 516 .endif
 517
 518 # the rest is done repeatedly for every Makefile.depend we read.
 519 # if we are anything but the original dir we care only about the
 520 # machine type we were included for..
 521
 522 .if ${DEP_RELDIR} == "."
 523 _this_dir := ${SRCTOP}
 524 .else
 525 _this_dir := ${SRCTOP}/${DEP_RELDIR}
 526 .endif
 527
 528 # on rare occasions, there can be a need for extra help
 529 _dep_hack := ${_this_dir}/${.MAKE.DEPENDFILE_PREFIX}.inc
 530 .-include <${_dep_hack}>
 531
 532 .if ${DEP_RELDIR} != ${_DEP_RELDIR} || ${DEP_TARGET_SPEC} != ${TARGET_SPEC}
 533 # this should be all
 534 _machines := ${DEP_MACHINE}
 535 .else
 536 # this is the machine list we actually use below
 537 _machines := ${_only_machines}
 538
 539 .if defined(HOSTPROG) || ${DEP_MACHINE} == "host"
 540 # we need to build this guy's dependencies for host as well.
 541 _machines += host
 542 .endif
 543
 544 _machines := ${_machines:O:u}
 545 .endif
 546
 547 .if ${TARGET_SPEC_VARS:[#]} > 1
 548 # we need to tweak _machines
 549 _dm := ${DEP_MACHINE}
 550 # apply the same filtering that we do when qualifying DIRDEPS.
 551 # M_dep_qual_fixes expects .${MACHINE}* so add (and remove) '.'
 552 # Again we expect that any already qualified machines are fully qualified.
 553 _machines := ${_machines:M*,*} ${_machines:N*,*:@DEP_MACHINE@${DEP_TARGET_SPEC}@:S,^,.,:${M_dep_qual_fixes:ts:}:O:u:S,^.,,}
 554 DEP_MACHINE := ${_dm}
 555 _machines := ${_machines:O:u}
 556 .endif
 557
 558 # reset each time through
 559 _build_dirs =
 560
 561 .if ${DEP_RELDIR} == ${_DEP_RELDIR}
 562 # pickup other machines for this dir if necessary
 563 .if ${BUILD_AT_LEVEL0:Uyes} == "no"
 564 _build_dirs += ${_machines:@m@${_CURDIR}.$m@}
 565 .else
 566 _build_dirs += ${_machines:N${DEP_TARGET_SPEC}:@m@${_CURDIR}.$m@}
 567 .if ${DEP_TARGET_SPEC} == ${TARGET_SPEC}
 568 # pickup local dependencies now
 569 .if ${MAKE_VERSION} < 20160220
 570 .-include <.depend>
 571 .else
 572 .dinclude <.depend>
 573 .endif
 574 .endif
 575 .endif
 576 .endif
 577
 578 .if ${_debug_reldir}
 579 .info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: DIRDEPS='${DIRDEPS}'
 580 .info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: _machines='${_machines}'
 581 .endif
 582
 583 .if !empty(DIRDEPS)
 584 # these we reset each time through as they can depend on DEP_MACHINE
 585 DEP_DIRDEPS_FILTER = \
 586         ${DIRDEPS_FILTER.${DEP_TARGET_SPEC}:U} \
 587         ${TARGET_SPEC_VARS:@v@${DIRDEPS_FILTER.${DEP_$v}:U}@} \
 588         ${DIRDEPS_FILTER:U}
 589 .if empty(DEP_DIRDEPS_FILTER)
 590 # something harmless
 591 DEP_DIRDEPS_FILTER = U
 592 .endif
 593
 594 # this is what we start with
 595 __depdirs := ${DIRDEPS:${NSkipDir}:${DEP_DIRDEPS_FILTER:ts:}:C,//+,/,g:O:u:@d@${SRCTOP}/$d@}
 596
 597 # some entries may be qualified with .<machine>
 598 # the :M*/*/*.* just tries to limit the dirs we check to likely ones.
 599 # the ${d:E:M*/*} ensures we don't consider junos/usr.sbin/mgd
 600 __qual_depdirs := ${__depdirs:M*/*/*.*:@d@${exists($d):?:${"${d:E:M*/*}":?:${exists(${d:R}):?$d:}}}@}
 601 __unqual_depdirs := ${__depdirs:${__qual_depdirs:Uno:${M_ListToSkip}}}
 602
 603 .if ${DEP_RELDIR} == ${_DEP_RELDIR}
 604 # if it was called out - we likely need it.
 605 __hostdpadd := ${DPADD:U.:M${HOST_OBJTOP}/*:S,${HOST_OBJTOP}/,,:H:${NSkipDir}:${DIRDEPS_FILTER:ts:}:S,$,.host,:N.*:@d@${SRCTOP}/$d@}
 606 __qual_depdirs += ${__hostdpadd}
 607 .endif
 608
 609 .if ${_debug_reldir}
 610 .info depdirs=${__depdirs}
 611 .info qualified=${__qual_depdirs}
 612 .info unqualified=${__unqual_depdirs}
 613 .endif
 614
 615 # _build_dirs is what we will feed to _DIRDEP_USE
 616 _build_dirs += \
 617         ${__qual_depdirs:M*.host:${NSkipHostDir}:N.host} \
 618         ${__qual_depdirs:N*.host} \
 619         ${_machines:Mhost*:@m@${__unqual_depdirs:@d@$d.$m@}@:${NSkipHostDir}:N.host} \
 620         ${_machines:Nhost*:@m@${__unqual_depdirs:@d@$d.$m@}@}
 621
 622 # qualify everything now
 623 _build_dirs := ${_build_dirs:${M_dep_qual_fixes:ts:}:O:u}
 624
 625 .endif                          # empty DIRDEPS
 626
 627 _build_all_dirs += ${_build_dirs}
 628 _build_all_dirs := ${_build_all_dirs:O:u}
 629
 630 # Normally if doing make -V something,
 631 # we do not want to waste time chasing DIRDEPS
 632 # but if we want to count the number of Makefile.depend* read, we do.
 633 .if ${.MAKEFLAGS:M-V${_V_READ_DIRDEPS}} == ""
 634 .if !empty(_build_all_dirs)
 635 .if ${BUILD_DIRDEPS_CACHE} == "yes"
 636 x!= { echo; echo '\# ${DEP_RELDIR}.${DEP_TARGET_SPEC}'; \
 637         echo 'dirdeps: ${_build_all_dirs:${M_oneperline}}'; echo; } >&3; echo
 638 x!= { ${_build_all_dirs:@x@${target($x):?:echo '$x: _DIRDEP_USE';}@} echo; } >&3; echo
 639 .else
 640 # this makes it all happen
 641 dirdeps: ${_build_all_dirs}
 642 .endif
 643 ${_build_all_dirs}:     _DIRDEP_USE
 644
 645 .if ${_debug_reldir}
 646 .info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: needs: ${_build_dirs}
 647 .endif
 648
 649 # this builds the dependency graph
 650 .for m in ${_machines}
 651 # it would be nice to do :N${.TARGET}
 652 .if !empty(__qual_depdirs)
 653 .for q in ${__qual_depdirs:${M_dep_qual_fixes:ts:}:E:O:u:N$m}
 654 .if ${_debug_reldir} || ${DEBUG_DIRDEPS:@x@${${DEP_RELDIR}.$m:L:M$x}${${DEP_RELDIR}.$q:L:M$x}@} != ""
 655 .info ${DEP_RELDIR}.$m: graph: ${_build_dirs:M*.$q}
 656 .endif
 657 .if ${BUILD_DIRDEPS_CACHE} == "yes"
 658 x!= { echo; echo '${_this_dir}.$m: ${_build_dirs:M*.$q:${M_oneperline}}'; echo; } >&3; echo
 659 .else
 660 ${_this_dir}.$m: ${_build_dirs:M*.$q}
 661 .endif
 662 .endfor
 663 .endif
 664 .if ${_debug_reldir}
 665 .info ${DEP_RELDIR}.$m: graph: ${_build_dirs:M*.$m:N${_this_dir}.$m}
 666 .endif
 667 .if ${BUILD_DIRDEPS_CACHE} == "yes"
 668 x!= { echo; echo '${_this_dir}.$m: ${_build_dirs:M*.$m:N${_this_dir}.$m:${M_oneperline}}'; echo; } >&3; echo
 669 .else
 670 ${_this_dir}.$m: ${_build_dirs:M*.$m:N${_this_dir}.$m}
 671 .endif
 672 .endfor
 673
 674 .endif
 675
 676 # Now find more dependencies - and recurse.
 677 .for d in ${_build_all_dirs}
 678 .if !target(_dirdeps_checked.$d)
 679 # once only
 680 _dirdeps_checked.$d:
 681 .if ${_debug_search}
 682 .info checking $d
 683 .endif
 684 # Note: _build_all_dirs is fully qualifed so d:R is always the directory
 685 .if exists(${d:R})
 686 # we pass _DEP_TARGET_SPEC to tell the next step what we want
 687 _DEP_TARGET_SPEC := ${d:E}
 688 # some makefiles may still look at this
 689 _DEP_MACHINE := ${d:E:C/,.*//}
 690 # set these too in case Makefile.depend* uses them
 691 .if ${TARGET_SPEC_VARS:[#]} > 1
 692 _dtspec := ${_DEP_TARGET_SPEC:S/,/ /g}
 693 .for i in ${_tspec_x}
 694 DEP_${TARGET_SPEC_VARS:[$i]} := ${_dtspec:[$i]}
 695 .endfor
 696 .else
 697 DEP_MACHINE := ${_DEP_MACHINE}
 698 .endif
 699 # Warning: there is an assumption here that MACHINE is always
 700 # the first entry in TARGET_SPEC_VARS.
 701 # If TARGET_SPEC and MACHINE are insufficient, you have a problem.
 702 _m := ${.MAKE.DEPENDFILE_PREFERENCE:T:S;${TARGET_SPEC}$;${d:E};:S;${MACHINE};${d:E:C/,.*//};:@m@${exists(${d:R}/$m):?${d:R}/$m:}@:[1]}
 703 .if !empty(_m)
 704 # M_dep_qual_fixes isn't geared to Makefile.depend
 705 _qm := ${_m:C;(\.depend)$;\1.${d:E};:${M_dep_qual_fixes:ts:}}
 706 .if ${_debug_search}
 707 .info Looking for ${_qm}
 708 .endif
 709 # set this "just in case"
 710 # we can skip :tA since we computed the path above
 711 DEP_RELDIR := ${_m:H:S,${SRCTOP}/,,}
 712 # and reset this
 713 DIRDEPS =
 714 .if ${_debug_reldir} && ${_qm} != ${_m}
 715 .info loading ${_m} for ${d:E}
 716 .endif
 717 .include <${_m}>
 718 .endif
 719 .endif
 720 .endif
 721 .endfor
 722
 723 .endif                          # -V
 724 .endif                          # BUILD_DIRDEPS
 725
 726 .elif ${.MAKE.LEVEL} > 42
 727 .error You should have stopped recursing by now.
 728 .else
 729 # we are building something
 730 DEP_RELDIR := ${RELDIR}
 731 _DEP_RELDIR := ${RELDIR}
 732 # pickup local dependencies
 733 .if ${MAKE_VERSION} < 20160220
 734 .-include <.depend>
 735 .else
 736 .dinclude <.depend>
 737 .endif
 738 .endif
 739
 740 # bootstrapping new dependencies made easy?
 741 .if !target(bootstrap) && (make(bootstrap) || \
 742         make(bootstrap-this) || \
 743         make(bootstrap-recurse) || \
 744         make(bootstrap-empty))
 745
 746 # if we are bootstrapping create the default
 747 _want = ${.CURDIR}/${.MAKE.DEPENDFILE_DEFAULT:T}
 748
 749 .if exists(${_want})
 750 # stop here
 751 ${.TARGETS:Mboot*}:
 752 .elif !make(bootstrap-empty)
 753 # find a Makefile.depend to use as _src
 754 _src != cd ${.CURDIR} && for m in ${.MAKE.DEPENDFILE_PREFERENCE:T:S,${MACHINE},*,}; do test -s $$m || continue; echo $$m; break; done; echo
 755 .if empty(_src)
 756 .error cannot find any of ${.MAKE.DEPENDFILE_PREFERENCE:T}${.newline}Use: bootstrap-empty
 757 .endif
 758
 759 _src?= ${.MAKE.DEPENDFILE}
 760
 761 .MAKE.DEPENDFILE_BOOTSTRAP_SED+= -e 's/${_src:E:C/,.*//}/${MACHINE}/g'
 762
 763 # just create Makefile.depend* for this dir
 764 bootstrap-this: .NOTMAIN
 765         @echo Bootstrapping ${RELDIR}/${_want:T} from ${_src:T}; \
 766         echo You need to build ${RELDIR} to correctly populate it.
 767 .if ${_src:T} != ${.MAKE.DEPENDFILE_PREFIX:T}
 768         (cd ${.CURDIR} && sed ${.MAKE.DEPENDFILE_BOOTSTRAP_SED} ${_src} > ${_want:T})
 769 .else
 770         cp ${.CURDIR}/${_src:T} ${_want}
 771 .endif
 772
 773 # create Makefile.depend* for this dir and its dependencies
 774 bootstrap: bootstrap-recurse
 775 bootstrap-recurse: bootstrap-this
 776
 777 _mf := ${.PARSEFILE}
 778 bootstrap-recurse:      .NOTMAIN .MAKE
 779         @cd ${SRCTOP} && \
 780         for d in `cd ${RELDIR} && ${.MAKE} -B -f ${"${.MAKEFLAGS:M-n}":?${_src}:${.MAKE.DEPENDFILE:T}} -V DIRDEPS`; do \
 781                 test -d $$d || d=$${d%.*}; \
 782                 test -d $$d || continue; \
 783                 echo "Checking $$d for bootstrap ..."; \
 784                 (cd $$d && ${.MAKE} -f ${_mf} bootstrap-recurse); \
 785         done
 786
 787 .endif
 788
 789 # create an empty Makefile.depend* to get the ball rolling.
 790 bootstrap-empty: .NOTMAIN .NOMETA
 791         @echo Creating empty ${RELDIR}/${_want:T}; \
 792         echo You need to build ${RELDIR} to correctly populate it.
 793         @{ echo DIRDEPS=; echo ".include <dirdeps.mk>"; } > ${_want}
 794
 795 .endif