https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65500
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- After some discussion with Torvald I'm wondering whether it would be better to never use the PTHREAD_RWLOCK_INITIALIZER macro anyway, so we can initialize the rwlock with (non-standard) attributes such as PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP
