Lisandro Dalcin

> Is it necessary to set PYTHONDONTWRITEBYTECODE=1? If you implement filtering, then no, it is not really necessary. However, given than you already have to set `PYTHONHASHSEED=0` to fix the...

Update: UCX does not build, too. The issue is related to [GCC 15 changes](https://gcc.gnu.org/gcc-15/changes.html#c), now they use `-std=gnu23` by default. Under C23, a function prototype like `void foo()` no longer...

Upstream UCX issue: openucx/ucx#10589

UCX update: MPICH may have to wait until release 1.19.0. I submitted a patch upstream against the main branch, but I think that is not enough to fix 1.18.x. openucx/ucx#10668

> I am eager to move to 1.19.x Actually, I think I made a mistake. My PR targets the master branch, but I think I should have submitted against v1.19.x.

@hzhou @raffenet My fix has been merged into UCX measter: openucx/ucx#10668. Could you please pull in the patch? Without these fixes, it is impossible to build using `./configure -with-ucx=embedded` in...

The UCX issues were fixed after a submodule update. The OFI issues remain, but let's keep the discussion in #7554.