PR libfortran/62296 * intrinsics/execute_command_line.c (EXEC_INVALIDCOMMAND): New error code. (cmdmsg_values): New error message. (set_cmdstat): Rework runtime error. (execute_command_line): Handle invalid command line error status. * gfortran.dg/execute_command_line_2.f90: New test. From-SVN: r227105