Module f2k_error_handler: Can we get some inspiration from https://github.com/koenpoppe/ErrorHandlingInFortran2003 ?
Subprogram f2k_error_handler::raise_error (error_message): Implement optional error unit to be passed by the user
Subprogram f2k_header::header (message, unit)
Subprogram f2k_test::end_test ()
Subprogram f2k_test::start_test (outroot)