Update to latest nightly tarball of hwloc 1.9.1

[rhc54]

No description provided.

[rhc54]

@Di0gen I'm seeing some strange error out of the Jenkins tests that doesn't seem related to anything being done:

23:11:34 ../../../opal/.libs/libopen-pal.so: undefined reference to `pthread_atfork'

Is there a pthread library missing on the Jenkins server?

[jladd-mlnx]

@rhc54 The following PR #1181 broke something and yet it was merged anyway.

[jladd-mlnx]

@rhc It's not just isolated to the Jenkins server, it's breaking our MTT builds everywhere. Please fix.

[jsquyres]

Yeah, the pthread_atfork problem is legit; not due to any site-specific CI issue. I think we got "numbed" to CI failures, unfortunately, and missed that this was a legit problem.

[rhc54]

Why are we discussing it here instead of there? Has nothing to do with this PR.

[jsquyres]

@jladd-mlnx Can you file an issue about the pthread_atfork failure? Please cite the originating PR (that you mentioned above). Thanks.

[sjeaugey]

Tried that PR and it fixes the hwloc crash problem on my machine causing MTT to report 100% failure on v1.10. So 👍

Note : I had to use "CFLAGS=-lpthread ./configure ..." to WAR the pthread problem.