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build: add a config option for passing the top-level make jobserver to packages that have parallel build enabled, significantly improves parallelization and gets rid of CPU overcommit during intra-package parallel builds

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SVN-Revision: 33414
This commit is contained in:
Felix Fietkau
2012-09-15 10:21:24 +00:00
parent ed14ffc7da
commit be6f437649
3 changed files with 18 additions and 3 deletions
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8
include/package.mk
View File

@@ -15,11 +15,17 @@ PKG_MD5SUM ?= unknown
PKG_BUILD_PARALLEL ?=
PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
MAKE_J:=$(MAKE_JOBSERVER)
else
MAKE_J:=-j$(CONFIG_PKG_BUILD_JOBS)
endif
ifeq ($(strip $(PKG_BUILD_PARALLEL)),0)
PKG_JOBS?=-j1
else
PKG_JOBS?=$(if $(PKG_BUILD_PARALLEL)$(CONFIG_PKG_DEFAULT_PARALLEL),\
$(if $(CONFIG_PKG_BUILD_PARALLEL),-j$(CONFIG_PKG_BUILD_JOBS),-j1),-j1)
$(if $(CONFIG_PKG_BUILD_PARALLEL),$(MAKE_J),-j1),-j1)
endif
include $(INCLUDE_DIR)/prereq.mk

2
include/toplevel.mk
View File

@@ -148,7 +148,7 @@ prereq:: prepare-tmpinfo .config
echo "WARNING: your configuration is out of sync. Please run make menuconfig, oldconfig or defconfig!"; \
fi \
)
@+$(SUBMAKE) -r $@
@+$(SUBMAKE) -r $@ MAKE_JOBSERVER="$(filter --jobserver% -j,$(MAKEFLAGS))"
help:
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