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build: don't add -j for parallel builds with Make 4.2+ 

Make usually passes -j and jobserver arguments as part of MAKEFLAGS. LEDE
removes MAKEFLAGS to have better control of the build, and re-adds the
jobserver arguments with -j to the Make commandline where desired.

Make 4.2+ behave differently with these arguments passed on the commandline
than in MAKEFLAGS: -j will override the jobserver argument and the job
count will be unlimited.

Moving the flags to MAKEFLAGS will need many packages to be changed and
tested; therefore, we opt for a less invasive change for now and just
remove -j for Make 4.2+, as the jobserver argument alone is enough to
enable parallel builds for these Make versions.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
owl
Matthias Schiffer 2016-06-15 18:56:17 +02:00
parent e2a9c638e7
commit 6fb212f293
No known key found for this signature in database
GPG Key ID: 16EF3F64CB201D9C
2 changed files with 2 additions and 2 deletions
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2
include/host-build.mk
View File

@ -10,7 +10,7 @@ HOST_INSTALL_DIR ?= $(HOST_BUILD_DIR)/host-install
HOST_BUILD_PARALLEL ?=
ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
HOST_MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) -j)
HOST_MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) $(if $(filter 3.% 4.0 4.1,$(MAKE_VERSION)),-j))
else
HOST_MAKE_J:=-j$(CONFIG_PKG_BUILD_JOBS)
endif

2
include/package.mk
View File

@ -17,7 +17,7 @@ PKG_USE_MIPS16 ?= 1
PKG_IREMAP ?= 1
ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) -j)
MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) $(if $(filter 3.% 4.0 4.1,$(MAKE_VERSION)),-j))
else
MAKE_J:=-j$(CONFIG_PKG_BUILD_JOBS)
endif