https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81690
--- Comment #7 from Tobias Burnus <burnus at gcc dot gnu.org> --- (In reply to Tobias Burnus from comment #6) > for a busy-wait implementation, which was supposed get rewritten (see next > message in thread) "using declare variant". The missing bit referenced there is: https://gcc.gnu.org/ml/gcc-patches/2019-11/msg01493.html
