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author | Masahiro Yamada <masahiroy@kernel.org> | 2023-08-21 01:18:02 +0300 |
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committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-08-29 16:29:35 +0300 |
commit | ed79c34d3cf8539589257189bf4a08418d7f2abf (patch) | |
tree | fe883980bc7493da4201c073ebfc2b3ea08144a0 /init | |
parent | e930d97f6d3ea4f43cb2c465d02e834d675c5274 (diff) | |
download | linux-ed79c34d3cf8539589257189bf4a08418d7f2abf.tar.xz |
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>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions