Man pages matching name opalcc in section 1:

opalCC.1.en	debian 10 / openmpi-bin
opalcc.1.en	debian 10 / openmpi-bin
opalCC.1.en	debian 11 / openmpi-bin
opalcc.1.en	debian 11 / openmpi-bin
opalCC.1.en	debian 12 / openmpi-bin
opalcc.1.en	debian 12 / openmpi-bin