From: Dan Nagle <dna...@erols.com>
Subject: Re: Help on how to create a library with F90
Date: 1999/09/06
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NNTP-Posting-Date: 6 Sep 1999 16:39:56 GMT
Newsgroups: comp.lang.fortran

Hello,

Regrettably, this is processor dependent, meaning that the standard
does not specify the file names for module symbol files.  Some
vendors use .mod, others .M, others some variation of .o or .obj.

Also, regrettably, there is nothing in the standard which requires
that a module produce a library when compiled.  Many compilers
produce a .o or .obj file when compiling a module.  Thus, one
may or may not get a selective load when using a module, i.e., one
may have many unused items in the executable.

For more specific advice, please state your compiler/os.

Wai Sun Don wrote:
> 
> I am attempting to create a mathematical library using Fortran 90.
> However, I ran into the following difficult that I hope someone can
> give me
> some pointer.
> 
> I have the following module that was archived into the library, say
> libjunk.a
> 
> Module Junk_Library
>   USE A
>   USE B
> END Module Junk_Library
> 
> A and B are two modules containing all the  subroutines of the
> library.
> 
> In the main program, I would   USE    the Module Junk_Library in order
> to
> access the subroutines  contained in modules A and B
> 
> For example,
> 
> Program Main
>   USE Junk_Library
> 
> .....
> 
> END Program
> 
> 
> To create the executable, I compile the program Main and link it with
> the library  libjunk.a
> (without the lib and a, of course.)  However, the F90 compiler would
> complaint that
>    it is unable to access the module symbol file for the module
> Junk_Library, namely
>      Junk_Library.mod
> which was deleted after the creation of the library  libjunk.a
> 
> So, in the sense, if I wish to distribute the library, I would have to
> also distribute the module symbol
> file   Junk_Library.mod ?   Is there anyway to get around this
> problem?  If so, How?
> 
> Thanks for the info.
> 
> --
> .....................................................................
> Prof. Wai Sun Don, PhD
> 
> Box F, 182 George Street
> Div. of Applied Math.                 Tel : (401)-863-2250
> Brown University                      Fax : (401)-863-1355
> Providence, RI 02912
> 
> 

-- 

Cheers!
Dan Nagle		dna...@erols.com
Purple Sage Computing Solutions, Inc.