Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
ocamlyacc -version (return code: 0)
The OCaml parser generator, version 4.04.0
ocamlyacc --help (return code: 1)
usage: ocamlyacc [-v] [--strict] [-q] [-b file_prefix] filename