https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121889
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Reduced C++ code seems to be:
void pthread_key_create();
static __typeof(pthread_key_create) __gthrw___pthread_key_create
__attribute__((__weakref__("")));
template <class> void zeta_imp_odd_integer() { thread_local int digits; }
