From: lynnmcguire5@gmail.com   
      
   On 11/12/2024 2:01 AM, Thomas Koenig wrote:   
   > Lynn McGuire  schrieb:   
   >> On 11/11/2024 4:01 PM, Thomas Koenig wrote:   
   >>> Lynn McGuire  schrieb:   
   >>>> In gfortran, is it faster compile times with *.mod files ?  Or is it   
   >>>> just as fast compiling to include the module interface information in   
   >>>> each subroutine / function file ?   
   >>>   
   >>> I haven't benchmarked this, but I think likely that there would only   
   >>> be a small difference.  Usually, the front end only takes a small part of   
   >>> compilation time (but there are pathological cases).   
   >>>   
   >>> In general, modules are better because of automatic checking.   
   >>> If you want to avoid recompilation cascades, submodules (where   
   >>> you can separate the definition from the implementation) might   
   >>> be worth looking into.   
   >>>   
   >>>> Is there any chance that gfortran will automatically generate and use   
   >>>> module files in the future like IVF ?   
   >>>   
   >>> Not sure what you're asking for.  Can you give an example?   
   >>   
   >> 1. you compile abc.f in IVF   
   >> 2. IVF automagically creates an abc__genmod.f90 file in your release   
   >> subdirectory with the subroutine / function module interface in it   
   >   
   > I think I get the general gist (but it would help me understand   
   > if you could post a complete example).   
   >   
   > But gfortran currently does not have such a feature (which appears   
   > to duplicate modules).  It is also not immediately clear what should   
   > happen if, for example, a procedure uses a derived type from another   
   > module... (This may not be relevant to your case, but as a compiler   
   > writer, you have to think about this kind of thing :-|)   
   >   
   > What would go wrong if you simply encapsulated abc.f in   
   >   
   >        MODULE ABC   
   >        CONTAINS   
   > C  Your code here   
   >        END MODULE ABC   
   >   
   > ?   
      
   I am not sure what that would get me.  I have 6,000+ subroutines and   
   functions in 5,000+ files.  And I would still have to modify each file.   
      
   I am going to write a C++ program to put a USE statement in each   
   subroutine / function with the name of the subroutine / function to be   
   excluded.  It should not take me more than a day or three.   
      
   I scanned through the Fortran Language doc but it did not have a USE   
   case for this.   
       https://j3-fortran.org/doc/year/24/24-007.pdf   
      
   Thanks,   
   Lynn McGuire   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)