[Bug sanitizer/101978] thread sanitizer false positive when condition variable

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101978

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We even have tests for the bogus tsan errors:
g++.dg/tsan/pthread_cond_clockwait.C

(which fails on machines with an old glibc)