diff options
Diffstat (limited to 'targets/pseudo/universe/Makefile')
| -rw-r--r-- | targets/pseudo/universe/Makefile | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/targets/pseudo/universe/Makefile b/targets/pseudo/universe/Makefile new file mode 100644 index 0000000..ef696d3 --- /dev/null +++ b/targets/pseudo/universe/Makefile @@ -0,0 +1,73 @@ +# $FreeBSD$ + +# 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 +# some machines have more than one arch +TARGET_ARCHES_arm?= arm armeb armv6 armv6hf + +# 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 |
