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@@ -0,0 +1,48 @@
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+From: Matthias Schiffer <mschiffer@universe-factory.net>
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+Date: Wed, 15 Jun 2016 19:31:34 +0200
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+Subject: build: don't add -j for parallel builds with Make 4.2+
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+
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+Make usually passes -j and jobserver arguments as part of MAKEFLAGS. LEDE
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+removes MAKEFLAGS to have better control of the build, and re-adds the
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+jobserver arguments with -j to the Make commandline where desired.
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+
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+Make 4.2+ behave differently with these arguments passed on the commandline
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+than in MAKEFLAGS: -j will override the jobserver argument and the job
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+count will be unlimited.
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+
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+Moving the flags to MAKEFLAGS will need many packages to be changed and
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+tested; therefore, we opt for a less invasive change for now and just
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+remove -j for Make 4.2+, as the jobserver argument alone is enough to
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+enable parallel builds for these Make versions.
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+
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+Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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+Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
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+
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+Backport of LEDE 6fb212f2933bbbdf2935124205717c9d0ca72b32
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+
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+diff --git a/include/host-build.mk b/include/host-build.mk
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+index e2b5f2f..44401b8 100644
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+--- a/include/host-build.mk
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++++ b/include/host-build.mk
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+@@ -10,7 +10,7 @@ HOST_INSTALL_DIR ?= $(HOST_BUILD_DIR)/host-install
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+ HOST_BUILD_PARALLEL ?=
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+
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+ ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
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+- HOST_MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) -j)
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++ HOST_MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) $(if $(filter 3.% 4.0 4.1,$(MAKE_VERSION)),-j))
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+ else
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+ HOST_MAKE_J:=-j$(CONFIG_PKG_BUILD_JOBS)
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+ endif
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+diff --git a/include/package.mk b/include/package.mk
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+index c69d928..a99cdc6 100644
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+--- a/include/package.mk
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++++ b/include/package.mk
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+@@ -23,7 +23,7 @@ PKG_RELRO_PARTIAL ?= 1
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+ PKG_RELRO_FULL ?= 1
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+
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+ ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
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+- MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) -j)
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++ MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) $(if $(filter 3.% 4.0 4.1,$(MAKE_VERSION)),-j))
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+ else
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+ MAKE_J:=-j$(CONFIG_PKG_BUILD_JOBS)
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+ endif
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