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From: robert.corbett@sun.com
Newsgroups: comp.lang.ada,comp.lang.fortran
Subject: Re: Ada vs Fortran for scientific applications
Date: 30 May 2006 21:26:00 -0700
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Date: 2006-05-30T21:26:00-07:00
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Dick Hendrickson wrote:

> There's no real excuse for writting a new program
> without using modules to specify the interfaces and
> this essentially guarantees that the compiler will
> do the right thing.  One serious practical problem
> with large codes has been compilation cascades.  Any
> change to a low-level module almost always forced a
> recompilation of everything that used the module, even
> if the change had no effect on the interfaces.  This
> is mostly due to the way make interacts with the
> commonest implementation of modules, I think.  This
> will be fixed (or at least changed ;) ) in F2008.

There is a way to write makefiles that avoids recompilation
cascades without omitting essential dependencies.  The
problem is it takes a make expert to figure out how to do it.
Sun's make expert showed me how to do it.

A greater problem is that different implementations of
modules require different makefiles.  A UNIX/Linux
standard for implementing modules would be a boon to
users.

Bob Corbett