From:	Bjorn De Meyer <bgdmeyer AT eduserv2 DOT rug DOT ac DOT be>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: compiling math equations
Date:	Tue, 17 Nov 1998 16:15:44 +0100
Organization:	University of Ghent, Belgium
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To:	djgpp AT delorie DOT com
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On Mon, 16 Nov 1998, Roland Schulz wrote:

> Hey!
> I'm working on a simulating program and since I want it to be real fast,
> I want to compile the equations into a library and then link it together
> with my program. I got a few questions about libraries and related
> things:
> 1. Is it possible to change the library (put the new equation in it) and
> use the new library without a rebuilt (maybe with dynamic linking)?
Yes. 
There are packages like dlx, and the likes wich enable dll-like
stuff. However, I think that for your problem, you will probably not need
such packages as they may be more work than simply recompiling and
updating a library. And maybe you should think of building an
equation-interpreter using FLEX and BISON, so you don't have to
hard-code in new equations..

> 2. Is it possible to generate a library which can be linked with Visual
> C++ (sorry but I would like to program it for Windows the easy way)?
I'd say no. What with the differences in format between DJGPP's .a files
and window's .lib format.
> 3. If I'm going to distribute my program one day is it legal to include
> the following files: ar.exe, cc1, djgpp.env, gcc.exe, coping and math.h
> by itself or do I have to include any other files?
What will your users need ar.exe, cc1, djgpp.env, gcc and math.h for?
If they are end-users they will not be expected to do compiling by
themselves, while other DJGPP programmers will have them. And for copying,
you can redistribute this with any of your progarms, IF you want your
program to be GPL'ed. 
> 4. Is there any way to reduce the size of the files I have to include to
> compile REAL simple functions (math equations) even more with not to
> much effort (I don't want to program a whole new compiler)?
Eh, if you want to reduce your executable size, use UPX or DJP, and STRIP
your executables. But I don't really undersatnd what you are actually
aiming at...

> 
> Thanx a lot for your help in advance!!
> 
Hope this helps. Have fun :) !
> Roland Schulz
> 
> 
> 
> 

Bjorn De Meyer.
IA #i^4
Homepage: http://studwww.rug.ac.be/~bgdmeyer
E-mail: bjorn DOT demeyer AT rug DOT ac DOT be 
Licentiate Chemistry. 
Coordinator of the "Tales of Artah: First Sword" CRPG project.         
  
 "I've shaven. I'm happy. I have no religion. Don't pray for me." 
                                                Illusion of Gaia 2
         
                                   

        
              
                                   
            

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