/[no]fpscomp

Syntax:

/[no]fpscomp[:keyword...]

The /fpscomp option controls whether certain aspects of the run-time system and semantic language attributes within the compiler are compatible with Visual Fortran or Microsoft Fortran PowerStation. Specify /fpscomp or /fpscomp:all when porting applications from Microsoft Fortran PowerStation. Specify /nofpscomp when porting applications from Compaq Fortran. The /fpscomp options are:

• /fpscomp:[no]filesfromcmd
  Specifying /fpscomp:filesfromcmd allows the run-time system to use the filename specified on the command line only if the OPEN statement FILE specifier is omitted. Specifying /fpscomp:nofilesfromcmd disables the run-time system from using the filename specified on the command line when the OPEN statement FILE specifier is omitted, allowing the application of default directory, file name, and extensions like Compaq Fortran.
  
  
• /fpscomp:[no]listio
  Uses Microsoft compatible list I/O field widths and ?TBS?.
  
  
• /fpscomp:[no]logical
  Determines the convention for determining the truth associated with a logical value. Microsoft PowerStation Fortran or /fpscomp:logical uses 0 for false and 1 for true, whereas Compaq Fortran or /fpscomp:nological only looks at the low bit of the value, 0 for false, and a -1 for true.
  
  
• /fpscomp:[no]mixed_str_len_arg
  Determines the convention for passing the hidden length of character arguments. Specifying /fpscomp:mixed_str_len_arg requests that the hidden lengths be placed immediately after their corresponding character argument in the argument list, which is the method used by Microsoft Fortran PowerStation.

  Specifying /fpscomp:nomixed_str_len_arg requests that the hidden lengths be placed in sequential order at the end of the argument list, which was is the method used by Compaq Fortran on Windows NT Alpha (and Compaq Tru64 UNIX) systems. When porting mixed-language programs that pass character arguments, this option must be specified correctly or the order of hidden length arguments changed in the source code.

• /fpscomp:[no]run_time
  Controls which run-time behavior will be used. This is intended to include the I/O system, exception handling, and other areas. Specify /fpscomp:run_time to request Microsoft PowerStation Fortran run-time conventions. Specify /fpscomp:norun_time to request Compaq Fortran run-time conventions.
  
  
• /fpscomp:[no]unformatted
  Specify /fpscomp:unformatted to request Microsoft PowerStation Fortran compatible unformatted file format. Specify /fpscomp:nounformatted to request Compaq Fortran compatible unformatted file format.
  
  
• /fpscomp:all and /fpscomp
  Enable full Microsoft Fortran PowerStation compatibility or /fpscomp:(filesfromcmd, logical, listio, mixed_str_len_arg, run_time, unformatted).
  
  
• /nofpscomp or /fpscomp:none
  Enables full Compaq Fortran compatibility or /fpscomp:(nofilesfromcmd, nolistio, nological, nomixed_str_len_arg, norun_time, nounformatted).

If you omit /fpscomp, the defaults are /fpscomp:(filesfromcmd, nological, listio, mixed_str_len_arg, norun_time, unformatted).

The /fpscomp and /vms options are not allowed in the same command.