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Makefile
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Makefile.depend
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# $FreeBSD$ # This target is "special". # # The actual work is done via another target; # UNIVERSE_TARGET_RELDIR is used to identify it. # # We leverage dirdeps.mk to run a sub-make per # MACHINE/ARCH to each build ${UNIVERSE_TARGET_RELDIR} # in meta mode. # # We simply override the level at which dirdeps.mk normally does # its thing, and give it a DIRDEPS list that corresponds to # ${UNIVERSE_TARGET_RELDIR}.${TARGET_SPEC} for each TARGET_SPEC we # want. # # This allows the computation of dependencies for each ${TARGET_SPEC} # to happen in parallel - avoiding a very long startup time. # We can even export each sub-make to a different machine if using a # cluster. # # The above works fine so long as our sub-makes remain independent. # That is; none of them attempts to visit any directory for a machine # other than the TARGET_SPEC we gave it. # For example; to build some tool for the pseudo machine "host". # To avoid that, our Makefile.depend lists all the hosttools we might # need and these will thus be built before we launch the # ${UNIVERSE_TARGET_RELDIR} sub-makes. # Further we add a filter to skip any "host" dirdeps during those # sub-makes. # # # this is the RELDIR of the target we build UNIVERSE_TARGET_RELDIR?= targets/pseudo/the-lot # the list of machines TARGET_MACHINE_LIST = i386 amd64 # avoid ../Makefile.inc defining this all: .include "../Makefile.inc" .if ${.MAKE.LEVEL} > 0 # ok our prerequisites have been built .if !defined(UNIVERSE_GUARD) # just incase we end up back here, # we cannot rely on .MAKE.LEVEL as we normally would UNIVERSE_GUARD=1 .export UNIVERSE_GUARD # we want to re-use dirdeps _DIRDEP_USE_LEVEL = ${.MAKE.LEVEL} # we want our sub-makes to think they are level 0 # and we don't want failure of one to stop all. DIRDEP_USE_ENV= \ MAKELEVEL=0 \ MAKE_JOB_ERROR_TOKEN=no _target_specs:= ${TARGET_MACHINE_LIST:@m@${TARGET_ARCHES_$m:U$m:@a@$m,$a@}@:O:u} DIRDEPS:= ${_target_specs:@t@${UNIVERSE_TARGET_RELDIR}.$t@} all: dirdeps .include <dirdeps.mk> .endif .endif
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