506 lines
17 KiB
Makefile
506 lines
17 KiB
Makefile
# $Id: dirdeps.mk,v 1.28 2013/03/25 21:11:43 sjg Exp $
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# Copyright (c) 2010-2013, Juniper Networks, Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# Much of the complexity here is for supporting cross-building.
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# If a tree does not support that, simply using plain Makefile.depend
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# should provide sufficient clue.
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# Otherwise the recommendation is to use Makefile.depend.${MACHINE}
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# as expected below.
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# Note: this file gets multiply included.
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# This is what we do with DIRDEPS
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# DIRDEPS:
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# This is a list of directories - relative to SRCTOP, it is
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# normally only of interest to .MAKE.LEVEL 0.
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# In some cases the entry may be qualified with a .<machine>
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# or .<target_spec> suffix (see TARGET_SPEC_VARS below),
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# for example to force building something for the pseudo
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# machines "host" or "common" regardless of current ${MACHINE}.
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#
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# All unqualified entries end up being qualified with .${TARGET_SPEC}
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# and partially qualified (if TARGET_SPEC_VARS has multiple
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# entries) are also expanded to a full .<target_spec>.
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# The _DIRDEPS_USE target uses the suffix to set TARGET_SPEC
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# correctly when visiting each entry.
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#
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# The fully qualified directory entries are used to construct a
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# dependency graph that will drive the build later.
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#
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# Also, for each fully qualified directory target, we will search
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# using ${.MAKE.DEPENDFILE_PREFERENCE} to find additional
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# dependencies. We use Makefile.depend (default value for
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# .MAKE.DEPENDFILE_PREFIX) to refer to these makefiles to
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# distinguish them from others.
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#
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# Each Makefile.depend file sets DEP_RELDIR to be the
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# the RELDIR (path relative to SRCTOP) for its directory, and
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# since each Makefile.depend file includes dirdeps.mk, this
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# processing is recursive and results in .MAKE.LEVEL 0 learning the
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# dependencies of the tree wrt the initial directory (_DEP_RELDIR).
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#
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# BUILD_AT_LEVEL0
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# Indicates whether .MAKE.LEVEL 0 builds anything:
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# if "no" sub-makes are used to build everything,
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# if "yes" sub-makes are only used to build for other machines.
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# It is best to use "no", but this can require fixing some
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# makefiles to not do anything at .MAKE.LEVEL 0.
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#
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# TARGET_SPEC_VARS
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# The default value is just MACHINE, and for most environments
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# this is sufficient. The _DIRDEPS_USE target actually sets
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# both MACHINE and TARGET_SPEC to the suffix of the current
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# target so that in the general case TARGET_SPEC can be ignored.
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#
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# If more than MACHINE is needed then sys.mk needs to decompose
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# TARGET_SPEC and set the relevant variables accordingly.
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# It is important that MACHINE be included in and actually be
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# the first member of TARGET_SPEC_VARS. This allows other
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# variables to be considered optional, and some of the treatment
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# below relies on MACHINE being the first entry.
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# Note: TARGET_SPEC cannot contain any '.'s so the target
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# triple used by compiler folk won't work (directly anyway).
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#
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# For example:
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#
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# # Always list MACHINE first,
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# # other variables might be optional.
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# TARGET_SPEC_VARS = MACHINE TARGET_OS
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# .if ${TARGET_SPEC:Uno:M*,*} != ""
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# _tspec := ${TARGET_SPEC:S/,/ /g}
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# MACHINE := ${_tspec:[1]}
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# TARGET_OS := ${_tspec:[2]}
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# # etc.
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# # We need to stop that TARGET_SPEC affecting any submakes
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# # and deal with MACHINE=${TARGET_SPEC} in the environment.
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# TARGET_SPEC =
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# # export but do not track
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# .export-env TARGET_SPEC
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# .export ${TARGET_SPEC_VARS}
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# .for v in ${TARGET_SPEC_VARS:O:u}
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# .if empty($v)
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# .undef $v
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# .endif
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# .endfor
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# .endif
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# # make sure we know what TARGET_SPEC is
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# # as we may need it to find Makefile.depend*
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# TARGET_SPEC = ${TARGET_SPEC_VARS:@v@${$v:U}@:ts,}
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#
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.if ${.MAKE.LEVEL} == 0
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# only the first instance is interested in all this
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# First off, we want to know what ${MACHINE} to build for.
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# This can be complicated if we are using a mixture of ${MACHINE} specific
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# and non-specific Makefile.depend*
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.if !target(_DIRDEP_USE)
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# do some setup we only need once
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_CURDIR ?= ${.CURDIR}
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# make sure these are empty to start with
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_DEP_TARGET_SPEC =
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_DIRDEP_CHECKED =
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# If TARGET_SPEC_VARS is other than just MACHINE
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# it should be set by sys.mk or similar by now.
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# TARGET_SPEC must not contain any '.'s.
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TARGET_SPEC_VARS ?= MACHINE
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# this is what we started with
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TARGET_SPEC = ${TARGET_SPEC_VARS:@v@${$v:U}@:ts,}
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# this is what we mostly use below
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DEP_TARGET_SPEC = ${TARGET_SPEC_VARS:S,^,DEP_,:@v@${$v:U}@:ts,}
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# make sure we have defaults
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.for v in ${TARGET_SPEC_VARS}
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DEP_$v ?= ${$v}
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.endfor
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.if ${TARGET_SPEC_VARS:[#]} > 1
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# Ok, this gets more complex (putting it mildly).
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# In order to stay sane, we need to ensure that all the build_dirs
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# we compute below are fully qualified wrt DEP_TARGET_SPEC.
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# The makefiles may only partially specify (eg. MACHINE only),
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# so we need to construct a set of modifiers to fill in the gaps.
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# jot 10 should output 1 2 3 .. 10
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JOT ?= jot
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_tspec_x := ${${JOT} ${TARGET_SPEC_VARS:[#]}:L:sh}
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# this handles unqualified entries
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M_dep_qual_fixes = C;(/[^/.,]+)$$;\1.$${DEP_TARGET_SPEC};
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# there needs to be at least one item missing for these to make sense
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.for i in ${_tspec_x:[2..-1]}
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_tspec_m$i := ${TARGET_SPEC_VARS:[2..$i]:@w@[^,]+@:ts,}
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_tspec_a$i := ,${TARGET_SPEC_VARS:[$i..-1]:@v@$$$${DEP_$v}@:ts,}
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M_dep_qual_fixes += C;(\.${_tspec_m$i})$$;\1${_tspec_a$i};
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.endfor
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.else
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# A harmless? default.
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M_dep_qual_fixes = U
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.endif
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.if !defined(.MAKE.DEPENDFILE_PREFERENCE)
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# .MAKE.DEPENDFILE_PREFERENCE makes the logic below neater?
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# you really want this set by sys.mk or similar
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.MAKE.DEPENDFILE_PREFERENCE = ${_CURDIR}/${.MAKE.DEPENDFILE:T}
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.if ${.MAKE.DEPENDFILE:E} == "${TARGET_SPEC}"
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.if ${TARGET_SPEC} != ${MACHINE}
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.MAKE.DEPENDFILE_PREFERENCE += ${_CURDIR}/${.MAKE.DEPENDFILE:T:R}.$${MACHINE}
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.endif
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.MAKE.DEPENDFILE_PREFERENCE += ${_CURDIR}/${.MAKE.DEPENDFILE:T:R}
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.endif
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.endif
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_default_dependfile := ${.MAKE.DEPENDFILE_PREFERENCE:[1]:T}
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_machine_dependfiles := ${.MAKE.DEPENDFILE_PREFERENCE:T:M*${MACHINE}*}
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# for machine specific dependfiles we require ${MACHINE} to be at the end
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# also for the sake of sanity we require a common prefix
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.if !defined(.MAKE.DEPENDFILE_PREFIX)
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# knowing .MAKE.DEPENDFILE_PREFIX helps
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.if !empty(_machine_dependfiles)
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.MAKE.DEPENDFILE_PREFIX := ${_machine_dependfiles:[1]:T:R}
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.else
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.MAKE.DEPENDFILE_PREFIX := ${_default_dependfile:T}
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.endif
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.endif
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# this is how we identify non-machine specific dependfiles
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N_notmachine := ${.MAKE.DEPENDFILE_PREFERENCE:E:N*${MACHINE}*:${M_ListToSkip}}
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.endif # !target(_DIRDEP_USE)
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# if we were included recursively _DEP_TARGET_SPEC should be valid.
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.if empty(_DEP_TARGET_SPEC)
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# we may or may not have included a dependfile yet
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_last_dependfile := ${.MAKE.MAKEFILES:M*/${.MAKE.DEPENDFILE_PREFIX}*:[-1]}
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.if !empty(_debug_reldir)
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.info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: _last_dependfile='${_last_dependfile}'
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.endif
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.if empty(_last_dependfile) || ${_last_dependfile:E:${N_notmachine}} == ""
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# this is all we have to work with
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DEP_MACHINE = ${TARGET_MACHINE:U${MACHINE}}
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_DEP_TARGET_SPEC := ${DEP_TARGET_SPEC}
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.else
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_DEP_TARGET_SPEC = ${_last_dependfile:${M_dep_qual_fixes:ts:}:E}
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.endif
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.if !empty(_last_dependfile)
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# record that we've read dependfile for this
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_DIRDEP_CHECKED += ${_CURDIR}.${TARGET_SPEC}
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.endif
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.endif
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# by now _DEP_TARGET_SPEC should be set, parse it.
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.if ${TARGET_SPEC_VARS:[#]} > 1
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# we need to parse DEP_MACHINE may or may not contain more info
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_tspec := ${_DEP_TARGET_SPEC:S/,/ /g}
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.for i in ${_tspec_x}
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DEP_${TARGET_SPEC_VARS:[$i]} := ${_tspec:[$i]}
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.endfor
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.for v in ${TARGET_SPEC_VARS:O:u}
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.if empty(DEP_$v)
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.undef DEP_$v
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.endif
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.endfor
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.else
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DEP_MACHINE := ${_DEP_TARGET_SPEC}
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.endif
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# pickup customizations
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# as below you can use !target(_DIRDEP_USE) to protect things
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# which should only be done once.
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.-include "local.dirdeps.mk"
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# the first time we are included the _DIRDEP_USE target will not be defined
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# we can use this as a clue to do initialization and other one time things.
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.if !target(_DIRDEP_USE)
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# make sure this target exists
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dirdeps:
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# We normally expect to be included by Makefile.depend.*
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# which sets the DEP_* macros below.
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DEP_RELDIR ?= ${RELDIR}
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# this can cause lots of output!
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# set to a set of glob expressions that might match RELDIR
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DEBUG_DIRDEPS ?= no
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# remember the initial value of DEP_RELDIR - we test for it below.
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_DEP_RELDIR := ${DEP_RELDIR}
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# things we skip for host tools
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SKIP_HOSTDIR ?=
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NSkipHostDir = ${SKIP_HOSTDIR:N*.host:S,$,.host,:N.host:${M_ListToSkip}}
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# things we always skip
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# SKIP_DIRDEPS allows for adding entries on command line.
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SKIP_DIR += .host *.WAIT ${SKIP_DIRDEPS}
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SKIP_DIR.host += ${SKIP_HOSTDIR}
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DEP_SKIP_DIR = ${SKIP_DIR} \
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${SKIP_DIR.${DEP_TARGET_SPEC}:U} \
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${SKIP_DIR.${DEP_MACHINE}:U} \
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${SKIP_DIRDEPS.${DEP_MACHINE}:U}
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NSkipDir = ${DEP_SKIP_DIR:${M_ListToSkip}}
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.if defined(NO_DIRDEPS) || defined(NODIRDEPS)
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# confine ourselves to the original dir
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DIRDEPS_FILTER += M${_DEP_RELDIR}*
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.endif
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# we supress SUBDIR when visiting the leaves
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# we assume sys.mk will set MACHINE_ARCH
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# you can add extras to DIRDEP_USE_ENV
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# if there is no makefile in the target directory, we skip it.
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_DIRDEP_USE: .USE .MAKE
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@for m in ${.MAKE.MAKEFILE_PREFERENCE}; do \
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test -s ${.TARGET:R}/$$m || continue; \
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echo "${TRACER}Checking ${.TARGET:R} for ${.TARGET:E} ..."; \
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MACHINE_ARCH= NO_SUBDIR=1 ${DIRDEP_USE_ENV} \
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TARGET_SPEC=${.TARGET:E} \
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MACHINE=${.TARGET:E} \
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${.MAKE} -C ${.TARGET:R} || exit 1; \
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break; \
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done
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.ifdef ALL_MACHINES
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# this is how you limit it to only the machines we have been built for
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# previously.
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.if empty(ONLY_MACHINE_LIST)
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.if !empty(ALL_MACHINE_LIST)
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# ALL_MACHINE_LIST is the list of all legal machines - ignore anything else
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_machine_list != cd ${_CURDIR} && 'ls' -1 ${ALL_MACHINE_LIST:O:u:@m@${.MAKE.DEPENDFILE:T:R}.$m@} 2> /dev/null; echo
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.else
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_machine_list != 'ls' -1 ${_CURDIR}/${.MAKE.DEPENDFILE_PREFIX}.* 2> /dev/null; echo
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.endif
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_only_machines := ${_machine_list:${NIgnoreFiles:UN*.bak}:E:O:u}
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.else
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_only_machines := ${ONLY_MACHINE_LIST}
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.endif
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.if empty(_only_machines)
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# we must be boot-strapping
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_only_machines := ${TARGET_MACHINE:U${ALL_MACHINE_LIST:U${DEP_MACHINE}}}
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.endif
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.else # ! ALL_MACHINES
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# if ONLY_MACHINE_LIST is set, we are limited to that
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# if TARGET_MACHINE is set - it is really the same as ONLY_MACHINE_LIST
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# otherwise DEP_MACHINE is it - so DEP_MACHINE will match.
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_only_machines := ${ONLY_MACHINE_LIST:U${TARGET_MACHINE:U${DEP_MACHINE}}:M${DEP_MACHINE}}
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.endif
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.if !empty(NOT_MACHINE_LIST)
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_only_machines := ${_only_machines:${NOT_MACHINE_LIST:${M_ListToSkip}}}
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.endif
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# make sure we have a starting place?
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DIRDEPS ?= ${RELDIR}
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.endif # target
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_debug_reldir := ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.${DEP_MACHINE}:L:M$x}@}
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_debug_search := ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.depend:L:M$x}@}
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# the rest is done repeatedly for every Makefile.depend we read.
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# if we are anything but the original dir we care only about the
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# machine type we were included for..
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.if ${DEP_RELDIR} == "."
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_this_dir := ${SRCTOP}
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.else
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_this_dir := ${SRCTOP}/${DEP_RELDIR}
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.endif
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# on rare occasions, there can be a need for extra help
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_dep_hack := ${_this_dir}/${.MAKE.DEPENDFILE_PREFIX}.inc
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.-include "${_dep_hack}"
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.if ${DEP_RELDIR} != ${_DEP_RELDIR} || ${DEP_TARGET_SPEC} != ${TARGET_SPEC}
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# this should be all
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_machines := ${DEP_MACHINE}
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.else
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# this is the machine list we actually use below
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_machines := ${_only_machines}
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.if defined(HOSTPROG) || ${DEP_MACHINE} == "host"
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# we need to build this guy's dependencies for host as well.
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_machines += host
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.endif
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_machines := ${_machines:O:u}
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.endif
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.if ${TARGET_SPEC_VARS:[#]} > 1
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# we need to tweak _machines
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_dm := ${DEP_MACHINE}
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# apply the same filtering that we do when qualifying DIRDEPS.
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_machines := ${_machines:@DEP_MACHINE@${DEP_TARGET_SPEC}@:${M_dep_qual_fixes:ts:}:O:u}
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DEP_MACHINE := ${_dm}
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.endif
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# reset each time through
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_build_dirs =
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.if ${DEP_RELDIR} == ${_DEP_RELDIR}
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# pickup other machines for this dir if necessary
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.if ${BUILD_AT_LEVEL0:Uyes} == "no"
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_build_dirs += ${_machines:@m@${_CURDIR}.$m@}
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.else
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_build_dirs += ${_machines:N${DEP_TARGET_SPEC}:@m@${_CURDIR}.$m@}
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.if ${DEP_TARGET_SPEC} == ${TARGET_SPEC}
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# pickup local dependencies now
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.-include <.depend>
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.endif
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.endif
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.endif
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.if !empty(_debug_reldir)
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.info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: DIRDEPS='${DIRDEPS}'
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.info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: _machines='${_machines}'
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.endif
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.if !empty(DIRDEPS)
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# these we reset each time through as they can depend on DEP_MACHINE
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DEP_DIRDEPS_FILTER = \
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${DIRDEPS_FILTER.${DEP_TARGET_SPEC}:U} \
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${DIRDEPS_FILTER.${DEP_MACHINE}:U} \
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${DIRDEPS_FILTER:U}
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.if empty(DEP_DIRDEPS_FILTER)
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# something harmless
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DEP_DIRDEPS_FILTER = U
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.endif
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# this is what we start with
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__depdirs := ${DIRDEPS:${NSkipDir}:${DEP_DIRDEPS_FILTER:ts:}:O:u:@d@${SRCTOP}/$d@}
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# some entries may be qualified with .<machine>
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# the :M*/*/*.* just tries to limit the dirs we check to likely ones.
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# the ${d:E:M*/*} ensures we don't consider junos/usr.sbin/mgd
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__qual_depdirs := ${__depdirs:M*/*/*.*:@d@${exists($d):?:${"${d:E:M*/*}":?:${exists(${d:R}):?$d:}}}@}
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__unqual_depdirs := ${__depdirs:${__qual_depdirs:Uno:${M_ListToSkip}}}
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.if ${DEP_RELDIR} == ${_DEP_RELDIR}
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# if it was called out - we likely need it.
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__hostdpadd := ${DPADD:U.:M${HOST_OBJTOP}/*:S,${HOST_OBJTOP}/,,:H:${NSkipDir}:${DIRDEPS_FILTER:ts:}:S,$,.host,:N.*:@d@${SRCTOP}/$d@}
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__qual_depdirs += ${__hostdpadd}
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.endif
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.if !empty(_debug_reldir)
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.info depdirs=${__depdirs}
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.info qualified=${__qual_depdirs}
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.info unqualified=${__unqual_depdirs}
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.endif
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# _build_dirs is what we will feed to _DIRDEP_USE
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_build_dirs += \
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${__qual_depdirs:M*.host:${NSkipHostDir}:N.host} \
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${__qual_depdirs:N*.host} \
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${_machines:@m@${__unqual_depdirs:@d@$d.$m@}@}
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|
|
|
# qualify everything now
|
|
_build_dirs := ${_build_dirs:${M_dep_qual_fixes:ts:}:O:u}
|
|
|
|
.endif # empty DIRDEPS
|
|
|
|
# Normally if doing make -V something,
|
|
# we do not want to waste time chasing DIRDEPS
|
|
# but if we want to count the number of Makefile.depend* read, we do.
|
|
.if ${.MAKEFLAGS:M-V${_V_READ_DIRDEPS}} == ""
|
|
.if !empty(_build_dirs)
|
|
# this makes it all happen
|
|
dirdeps: ${_build_dirs}
|
|
${_build_dirs}: _DIRDEP_USE
|
|
|
|
.if !empty(_debug_reldir)
|
|
.info ${DEP_RELDIR}.${DEP_TARGET_SPEC}: needs: ${_build_dirs}
|
|
.endif
|
|
|
|
# this builds the dependency graph
|
|
.for m in ${_machines}
|
|
# it would be nice to do :N${.TARGET}
|
|
.if !empty(__qual_depdirs)
|
|
.for q in ${__qual_depdirs:${M_dep_qual_fixes:ts:}:E:O:u:N$m}
|
|
.if !empty(_debug_reldir) || ${DEBUG_DIRDEPS:@x@${${DEP_RELDIR}.$m:L:M$x}${${DEP_RELDIR}.$q:L:M$x}@} != ""
|
|
.info ${DEP_RELDIR}.$m: graph: ${_build_dirs:M*.$q}
|
|
.endif
|
|
${_this_dir}.$m: ${_build_dirs:M*.$q}
|
|
.endfor
|
|
.endif
|
|
.if !empty(_debug_reldir)
|
|
.info ${DEP_RELDIR}.$m: graph: ${_build_dirs:M*.$m:N${_this_dir}.$m}
|
|
.endif
|
|
${_this_dir}.$m: ${_build_dirs:M*.$m:N${_this_dir}.$m}
|
|
.endfor
|
|
|
|
.endif
|
|
|
|
# Now find more dependencies - and recurse.
|
|
.for d in ${_build_dirs}
|
|
.if ${_DIRDEP_CHECKED:M$d} == ""
|
|
# once only
|
|
_DIRDEP_CHECKED += $d
|
|
.if !empty(_debug_search)
|
|
.info checking $d
|
|
.endif
|
|
# Note: _build_dirs is fully qualifed so d:R is always the directory
|
|
.if exists(${d:R})
|
|
# Warning: there is an assumption here that MACHINE is always
|
|
# the first entry in TARGET_SPEC_VARS.
|
|
# If TARGET_SPEC and MACHINE are insufficient, you have a problem.
|
|
_m := ${.MAKE.DEPENDFILE_PREFERENCE:T:S;${TARGET_SPEC}$;${d:E};:S;${MACHINE};${d:E:C/,.*//};:@m@${exists(${d:R}/$m):?${d:R}/$m:}@:[1]}
|
|
.if !empty(_m)
|
|
# M_dep_qual_fixes isn't geared to Makefile.depend
|
|
_qm := ${_m:C;(\.depend)$;\1.${d:E};:${M_dep_qual_fixes:ts:}}
|
|
.if !empty(_debug_search)
|
|
.info Looking for ${_qm}
|
|
.endif
|
|
# we pass _DEP_TARGET_SPEC to tell the next step what we want
|
|
_DEP_TARGET_SPEC := ${d:E}
|
|
# some makefiles may still look at this
|
|
_DEP_MACHINE := ${d:E:C/,.*//}
|
|
.if !empty(_debug_reldir) && ${_qm} != ${_m}
|
|
.info loading ${_m} for ${d:E}
|
|
.endif
|
|
.include <${_m}>
|
|
.endif
|
|
.endif
|
|
.endif
|
|
.endfor
|
|
|
|
.endif # -V
|
|
|
|
.elif ${.MAKE.LEVEL} > 42
|
|
.error You should have stopped recursing by now.
|
|
.else
|
|
_DEP_RELDIR := ${DEP_RELDIR}
|
|
# pickup local dependencies
|
|
.-include <.depend>
|
|
.endif
|
|
|