[Bug 274284] science/py-scipy hangs during configure phase

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 06 Oct 2023 01:18:28 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274284

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib@FreeBSD.org

--- Comment #3 from Konstantin Belousov <kib@FreeBSD.org> ---
I see python process tightly looping doing nothing but calling sched_yield(),
the call comes from libomp.so.1.  Most likely cause is the following function:
void __kmp_infinite_loop(void) {
  static int done = FALSE;

  while (!done) {
    KMP_YIELD(TRUE);
  }
}
I do not know anything about OpenMP runtime to understand more, and binaries
do not have symbols.

BTW, it seems that Julia build also hangs with the similar syndrome.

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