PR#1130: Document %constrain_build -

packaging-committee

#1130 Document %constrain_build

Closed Jul 28, 2023 by tibbs. Opened Nov 2, 2021 by tibbs.

tibbs/packaging-committee constrain into master

tibbs commented Nov 2, 2021

This adds a small subsection to the section on parallel make which documents the %constrain_build macro.

Currently this macro exists in rawhide, but after testing I will backport it through Fedora and EPEL. (It uses features from RPM 4.17 so this does require a little work.) So this shouldn't be merged right now.

As an aside, I'm curious as to which buildsystems this doesn't affect. I'm pretty sure it doesn't change what %pyproject_wheel does. I think Perl just uses %make_build. Rust seems to incorporate %_smp_mflags, as does ninja, so they should work. should work. I've no idea at all about go.

churchyard commented Nov 2, 2021

%pyproject_wheel by default does nothing parallel. If the build backends build stuff in parallel, there is currently no way to pass options to it.

tibbs commented Nov 3, 2021

I assumed that under the hood it could end up building native code extensions from source, but I've no idea at all how that build happens or whether it would use any parallelism. If we can't pass options down to it then it's nothing to worry about. If that becomes possible in future then I assume it would use %_smp_mflags under the hood and that would simply work automatically.

salimma commented Nov 3, 2021

Ah, this seems like a saner replacement for https://pagure.io/packaging-committee/pull-request/1094 ?

tibbs commented Nov 4, 2021

Yes, this was created to address the issues Panu had.

salimma commented Nov 24, 2021

I just closed 1094 in favor of this one.

tibbs commented Jul 28, 2023

Closing this because in the end RPM upstream did something different.

Pull-Request has been closed by tibbs

Jul 28, 2023