From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: coprocessor error
Date: Tue, 2 Nov 1999 15:54:46 +0200
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On Tue, 2 Nov 1999, Damian Yerrick wrote:

> > I think what you need to do is link your program to the math coprocessor
> > library.
> > Just add '-lemu' at the end of the line in your makefile which links
> > everything together to produce the executable program.
> > This will allow your program to work on systems that do
> > not have a math coprocessor.
> 
> But isn't libemu really buggy?

It isn't buggier than the emulator emu387.dxe: they are both generated 
from the same code.

> It crashed every time I tried to use DJGPP 2.02's version on my 486SX.

If that was on Windows, then the bug is known (and corrected in the 
current development sources): the program gets stuck in an endless loop, 
you can bail out with Ctrl-C.  Otherwise, please tell the details; the 
emulator works just fine for me on plain DOS.

> I simply switched my math to fixed point, using the Allegro math
> library.

This is not a solution for programs which need serious floating-point 
math computations.  E.g., you cannot use well-established algorithms for 
numerical computations (such as ODE integration) with fixed-point math.  
You need to roll your own specialized algorithms, and that's not for the 
faint of heart.