MPI_Bcast(3) on Linux

The text 26222e84554f, as Debian 13 (Trixie), Debian 11 (Bullseye), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.

Broadcasts a message from the process with rank "root" to all other processes of the group.