2023-08-01 21:19:26 +09:00
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#!/usr/bin/make -f
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# SPDX-License-Identifier: GPL-2.0-only
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include debian/rules.vars
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srctree ?= .
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kbuild: deb-pkg: support DEB_BUILD_OPTIONS=parallel=N in debian/rules
'make srcdeb-pkg' generates a source package, which you can build
later by using dpkg-buildpackage.
In older dpkg versions, 'dpkg-buildpackage --jobs=N' sets not only
DEB_BUILD_OPTIONS but also MAKEFLAGS. Hence, passing -j or --jobs
to dpkg-buildpackage was enough for kicking the parallel execution.
The behavior was changed by commit 1d0ea9b2ba3f ("dpkg-buildpackage:
Change -j, --jobs semantics to non-force mode") of dpkg project. [1]
Since then, 'dpkg-buildpackage --jobs=N' sets only DEB_BUILD_OPTIONS,
which is not parsed by the current debian/rules. To build the package
in parallel, you need to pass the alternative --jobs-force option or
set the MAKEFLAGS environment variable.
Debian policy [2] suggests the following code snippet for debian/rules.
ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
MAKEFLAGS += -j$(NUMJOBS)
endif
I tweaked the code to filter out parallel=1 and passed --jobs=1 to
dpkg-buildpackage from scripts/Makefile.package. It is needed to force
'make deb-pkg' without the -j option to run in serial. Please note that
dpkg-buildpackage sets parallel=<nproc> in DEB_BUILD_OPTIONS by default
(that is, --jobs=auto is the default) and --jobs=1 is needed to restore
the serial execution. When dpkg-buildpackage is invoked from Kbuild,
the number of jobs is inherited from the top level Makefile. Passing
--jobs=1 to dpkg-buildpackage allows debian/rules to skip parsing
DEB_BUILD_OPTIONS.
[1] https://salsa.debian.org/dpkg-team/dpkg/-/commit/1d0ea9b2ba3f6a2de5b1a6ff55f3df7b71f73db6
[2] https://www.debian.org/doc/debian-policy/ch-source.html#s-debianrules-options
Reported-by: Bastian Germann <bage@linutronix.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2023-08-21 07:18:02 +09:00
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ifneq (,$(filter-out parallel=1,$(filter parallel=%,$(DEB_BUILD_OPTIONS))))
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NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
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MAKEFLAGS += -j$(NUMJOBS)
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endif
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2023-12-26 22:52:38 +09:00
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make-opts = ARCH=$(ARCH) KERNELRELEASE=$(KERNELRELEASE)
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2023-08-01 21:19:26 +09:00
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.PHONY: binary binary-indep binary-arch
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binary: binary-arch binary-indep
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binary-indep: build-indep
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binary-arch: build-arch
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2023-12-26 22:52:38 +09:00
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$(MAKE) -f $(srctree)/Makefile $(make-opts) \
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2023-08-01 21:19:26 +09:00
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run-command KBUILD_RUN_COMMAND=+$(srctree)/scripts/package/builddeb
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.PHONY: build build-indep build-arch
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build: build-arch build-indep
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build-indep:
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build-arch:
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2023-12-26 22:52:38 +09:00
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$(MAKE) -f $(srctree)/Makefile $(make-opts) \
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2023-08-01 21:19:26 +09:00
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$(shell $(srctree)/scripts/package/deb-build-option) \
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olddefconfig all
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.PHONY: clean
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clean:
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rm -rf debian/files debian/linux-*
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$(MAKE) -f $(srctree)/Makefile ARCH=$(ARCH) clean
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