flux-sched: add v0.34.0

[vsoch]

No description provided.

[alalazo]

There are failures in CI:

• https://gitlab.spack.io/spack/spack/-/jobs/11264722

It seems some part of the latest release requires C++ 20, and in CI we are compiling with GCC 7.3.1

We might need some minimum version for the compiler, for the time being. This will change soon, since we'd like to allow declarations like:

depends_on("cxx std=20")

and have Spack figure out automatically if a compiler fits.

[vsoch]

Ping @trws and @grondo - what do you think about pinning a gcc version (I think that's what is being asked above) to determine the latter?

[trws]

Currently we test most heavily with gcc12+ and clang15+. In principle gcc10 and 11 might also work, but I haven't done much work on ensuring that. I have another fix that needs to go into this package later as it happens, as soon as this one goes in I'll post that up (it has to do with the version override code added recently).

[trws]

I missed that this hasn't been done. We currently test in CI with gcc 9.4+ and clang15+, so those are safe to pin to. We may have to raise the gcc at some point because of library usage, but it's good for now.

[vsoch]

@trws so are you no longer working on an update for this and handing back to me to make those pins? I can update the PR to do exactly that.

[trws]

Ah, I must have miscommunicated, sorry about that. I was hoping you would do that here yes.

[vsoch]

No worries @trws I'm glad you checked in again!

@alalazo how do I specify the clang pin? For gcc I'm adding:

depends_on("gcc@9.4:")

[vsoch]

Tested locally with the gcc pin - let's see if that changes clang too. If not, I need some guidance on what to set for that.

[vsoch]

@alalazo looks like we have the same issue - let me know what you'd like to do.

[trws]

You probably want requires("%gcc@9.4:") or conflicts("%gcc@:9.3") rather than depends, since it isn't a build dependency as such yet.

[vsoch]

@trws @alalazo neither of those worked so I will need to ask for you help again - what should we try next?