URL:
<https://savannah.gnu.org/bugs/?63362>
Summary: make 4.4: different behavior with -j1 and -j2 when
building manpages from git
Project: make
Submitter: kanavin
Submitted: Mon 14 Nov 2022 10:04:36 AM UTC
Severity: 3 - Normal
Item Group: Bug
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.4
Operating System: POSIX-Based
Fixed Release: None
Triage Status: None
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Follow-up Comments:
-------------------------------------------------------
Date: Mon 14 Nov 2022 10:04:36 AM UTC By: Alexander Kanavin <kanavin>
When building git v2.38.1
(https://github.com/git/git/tags)
I noticed that make 4.4 behaves differently depending on parallelism
settings.
alex@alex-lx-laptop:~/development/git/Documentation$ ../../make-4.4/make -j1
git-add.1
SUBDIR ../
make[1]: 'GIT-VERSION-FILE' is up to date.
vs
alex@alex-lx-laptop:~/development/git/Documentation$ ../../make-4.4/make -j2
git-add.1
SUBDIR ../
make[1]: 'GIT-VERSION-FILE' is up to date.
XMLTO git-add.1
Makefile:355: warning: pattern recipe did not update peer target 'git-add.7'.
Makefile:355: warning: pattern recipe did not update peer target 'git-add.5'.
Manpages are rebuilt without need, if j is more than one. I believe this is
triggered by FORCE flag for one of the rules in the makefile, but still the
difference in behavior depending on what is in -j does not seem correct.
https://github.com/git/git/blob/v2.38.1/Documentation/Makefile#L326
I also confirmed that with make 4.3 this does not happen: manpages are not
rebuilt, regardless of -j. FORCE does not have an effect on this.
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