Libraries compiled modules

From: Pierre Asselin (pa_at_see.signature.invalid)
Date: 02/13/04 

Date: Fri, 13 Feb 2004 16:31:50 +0000 (UTC)

Is it possible to create and install libraries of Fortran modules?
This would be for modules that are sufficiently useful and mature to
be pre-compiled (pax, Jan!) and installed where other projects can
make use of them.

I realize that "install" is platform dependent, but I am more
concerned with compiler dependencies.

Example: Consider a file "toto.f90" on a Unix box, with

    module extremely_useful
        ! blah, blah, blah
    end module
    module very_handy
        ! blah
    end modle
    ! and so on

If I compile such a file with Portland, I get an object "toto.o" and
a bunch of module files "extremely_useful.mod", etc. The object files
can be bunched into a static or dynamic library (.a, .so) and copied
to /usr/local/lib and the .mod files can go in /usr/local/include/toto/ .
When I compile a main that USEs extremely_useful, I have to give a
flag like "-I/usr/local/include/toto -L/usr/local/lib" and everything works.

On Windows, Compaq Visual Fortran does much the same thing (.obj files
instead of .o) and the visual wizard gizmo lets me create static
libraries or dll's . Same deal, I would copy the libraries and
module files somewhere and specify "/I" flags in client projects.

On Linux, I seem to remember that Intel Fortran creates one module
file *per source file*, not per module, that is: a single file
"toto.mod" . It uses a few "work" files to keep track of what .mod
files to search when it encounters a "use" statement. The "work"
files are created by compiling the modules, do they go in
/usr/local/include/ as well? they are also updated when compiling
client programs so they seem to belong in the compilation directory
as well. What to do? (and, of course, someone correct me if what
I just said is wrong).

I realize that creating libraries lies outside of the scope of the
standard. My question is: do compilers support the process in
practice, when modules are involved? 

-- 
pa at panix dot com

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