https://www.unix.com/man-page/debian/3cxx/__gnu_parallel::accumulate_binop_reduct
__gnu_parallel::accumulate_binop_reduct(3cxx) debian man page | unix.com
Man page for __gnu_parallel::accumulate_binop_reduct(3cxx) on debian, from the unix.com online archive.
gnu parallelman pageaccumulatebinopreduct