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Updated comments on parallel building

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/tools/make/trunk@27879 72102866-910b-0410-8b05-ffd578937521
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Nicola Pero 2009-02-16 09:52:53 +00:00
parent 17d81326f5
commit b208832d48
1 changed files with 12 additions and 4 deletions
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16
rules.make
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@ -362,10 +362,18 @@ VPATH = .
# gnustep-make supports inherently sequential targets such as
# 'before-install' and 'after-install' which make it really difficult
# to support parallel building. At the moment, by default parallel
# building is not supported. We only enable it when
# GNUSTEP_MAKE_PARALLEL_BUILDING = yes and even then only in specific
# sub-invocations of make tagged with _GNUSTEP_MAKE_PARALLEL = yes.
# to support parallel building. So we don't enable paralell building
# in general. We only enable it when GNUSTEP_MAKE_PARALLEL_BUILDING =
# yes and even then only in specific 'Compile' sub-invocations of
# make, tagged with _GNUSTEP_MAKE_PARALLEL = yes. All the
# compilations are done in such invocations, so in practical terms, a
# lot of actual parallelization will be going on for large projects,
# with a very visible compilation speedup.
#
# Note that .NOTPARALLEL was added to GNU make on November 1999, so we
# consider it safe to use to control the parallel building. If you
# have an older GNU make, don't use parallel building because it's
# unsupported.
ifeq ($(GNUSTEP_MAKE_PARALLEL_BUILDING), no)
.NOTPARALLEL:
else