Hi,

Thanks for your comments! I've done more tests on a new machine and, for better or worse, was no longer able to reproduce the issue. Parallel compilation now works fine; I'll keep collecting output from make, and would post it here if the problem appears again.

One additional issue appeared, though: it seems that extension modules are always built sequentially no matter what the value of MAKEFLAGS is. I've seen that these are being built by a custom setup.py script. Do you think it would be possible to parallelize this script? Would people be interested in having a parallel version?

Cheers,
Jonas