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2023-01-16scripts: support GNU make 4.4 in jobserver-execMartin Liska1-5/+14
Starting with GNU make 4.4, --jobserver-auth newly uses named pipe (fifo) instead of part of opened file descriptors: https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html Support also the new format. Signed-off-by: Martin Liska <mliska@suse.cz> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-11-21scripts/jobserver-exec: parse the last --jobserver-auth= optionMasahiro Yamada1-1/+3
In the GNU Make manual, the section "Sharing Job Slots with GNU make" says: Be aware that the MAKEFLAGS variable may contain multiple instances of the --jobserver-auth= option. Only the last instance is relevant. Take the last element of the array, not the first. Link: https://www.gnu.org/software/make/manual/html_node/Job-Slots.html Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2021-05-17scripts/jobserver-exec: Fix a typo ("envirnoment")Jonathan Neuschäfer1-1/+1
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2021-02-01kbuild: remove PYTHON variableMasahiro Yamada1-1/+1
Python retired in 2020, and some distributions do not provide the 'python' command any more. As in commit 51839e29cb59 ("scripts: switch explicitly to Python 3"), we need to use more specific 'python3' to invoke scripts even if they are written in a way compatible with both Python 2 and 3. This commit removes the variable 'PYTHON', and switches the existing users to 'PYTHON3'. BTW, PEP 394 (https://www.python.org/dev/peps/pep-0394/) is a helpful material. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2019-11-22docs, parallelism: Rearrange how jobserver reservations are madeKees Cook1-0/+66
Rasmus correctly observed that the existing jobserver reservation only worked if no other build targets were specified. The correct approach is to hold the jobserver slots until sphinx has finished. To fix this, the following changes are made: - refactor (and rename) scripts/jobserver-exec to set an environment variable for the maximally reserved jobserver slots and exec a child, to release the slots on exit. - create Documentation/scripts/parallel-wrapper.sh which examines both $PARALLELISM and the detected "-jauto" logic from Documentation/Makefile to decide sphinx's final -j argument. - chain these together in Documentation/Makefile Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Link: https://lore.kernel.org/lkml/eb25959a-9ec4-3530-2031-d9d716b40b20@rasmusvillemoes.dk Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20191121205929.40371-4-keescook@chromium.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>