How to compile a USE module .mod ?

[Mike Linacre]

A great feature of the Absoft compiler is the "use module" capability.

The User Guide says: "See Fortran 90/95 Module Files in the chapter, Building Programs for more information." but nowhere can I find instructions how to compile a Use module .mod file.

Please anyone, how do we do it ???

[forumadmin]

Module files (.mod extension) are created by compiling the FORTRAN source file which defines them.

If you have a source file named test.f90 which contains the following module definition:

    MODULE CONSTANTS   
    IMPLICIT NONE   
    INTEGER, PARAMETER :: SECONDS_IN_MINUTE=60   
    INTEGER, PARAMETER :: SECONDS_IN_HOUR=3600   
    INTEGER, PARAMETER :: SECONDS_IN_DAY=86400
    INTEGER, PARAMETER :: MINUTES_IN_HOUR=60   
    INTEGER, PARAMETER :: MINUTES_IN_DAY=1440
    INTEGER, PARAMETER :: HOURS_IN_DAY=24   
    END MODULE CONSTANTS


then compiling this file with

   af90 -c test.f90

will produce two output files:  a module file CONSTANTS.mod and an object code file test.obj (test.o on Linux and macOS). If a module only defines constants then you only need the .mod file to be present when you compile another source file which uses the module through a USE statement. If a module defines variables and contained subroutines or functions, then you will also need to provide the object file created when the module is compiled when you link a program which uses the module.

When a source file defines multiple modules, a separate .mod file is created for each one. The variables and contained routines for all the modules defined in single source are placed in the object file.

[Mike Linacre]

Thanks, forumadmin. Brilliant! It works!

For anyone else ...

Here is my "interface.f" file:
        SUBROUTINE CREPORT (QNAME, QC, QN)
        MODULE INTERF
        INTERFACE CREPORT
        INTEGER(4) ::  QNAME
        INTEGER(4) ::  QC
        INTEGER(4) ::  QN
        END SUBROUTINE CREPORT
        END INTERFACE
        END MODULE INTERF
       (MORE LINES OF FORTRAN CODE HERE)
       END

When I compile this from the Absoft command line prompt,

C:\Absoft13.0>bin\af90 -c c:\(my path)\interface.f

nothing shows on my screen, but "INTERF.mod" is in my C:\Absoft13.0 folder.

Thanks again, forumadmin! You are a treasure :-)