From: "Paul Gardiner" <paul AT laser-point DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Questions about overlay files
Date: Sun, 27 May 2001 18:55:37 +0100
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To: djgpp AT delorie DOT com
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"Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il> wrote in message
news:1858-Sun27May2001190737+0300-eliz AT is DOT elta DOT co DOT il...
> > From: "Paul Gardiner" <paul AT laser-point DOT co DOT uk>
> > Newsgroups: comp.os.msdos.djgpp
> > Date: Sun, 27 May 2001 15:58:10 +0100
> >
> > Sorry, I'm not explaining myself at all well.  What I want to do is
write a
> > replacement for glide2x.ovl.  As far as I know, this is a sort of dll,
but
> > for DOS rather than Windows.
>
> I don't know what glide2x.ovl is, but from the file name it doesn't
> sound as if it is a DLL.  Anyway, it is probably specific to the
> compiler used to produce the program which can load this file.  Binary
> compatibility between executable formats produced by different
> compilers is not something you can rely on.

I've found out what it is: its a DOS/4G dynamic link library.

> > > In a nutshell, DJGPP is a compiler and a suite of development tools.
> >
> > That's what I thought really, but I guess what I don't understand is how
it
> > relates to other development systems for DOS, with regard to
compatibility.
>
> It doesn't: there's no compatibility at all.  Chapter 17 of the FAQ
> explains what little compatibility there is, but the bottom line is:
> you cannot practically use binary files produced by other compilers,
> or produce binary files that other compilers can use.

That's a shame.  I think I need WATCOM, but I don't think I can get a copy
now
they're half way through the process of going ope source.

Thanks for the advice, anyway.