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From:	CBFalconer <cbfalconer AT yahoo DOT com>
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Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: BASH 2.05 a cannot find GCC.EXE
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Date:	Wed, 06 Mar 2002 06:52:33 GMT
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Charles Sandmann wrote:
> 
... snip ...
> 
> Since most of the GNU distributions are very Unix/Linux biased, they
> assume you build in a shared library environment.  Quite often a major
> effort to fix.
> 
> On DOS, with only one program running at a time it doesn't make as
> much sense.  Tends to waste memory (you bring everything in the DLL
> in, even if you only need 1 procedure).  Many files to distribute.
> No "standard" location to put them.  No "standard" format.
> 
> One of the things I've been working on is trying to provide a better
> DLL type capability for DJGPP.  Maybe in a future release.

Actually the original real-mode DOS, with all addresses of the
form seg-offset, is much more conducive to this.  A shared library
can contain 0 based code, and all that has to be done is to load
the code and set a segment register.  Although the segments still
exist in DJGPP, they have been all set equal (except for one) to
use a flat scheme, and changing that would not be easy.

There are advantages to segmented memory :-)

-- 
Chuck F (cbfalconer AT yahoo DOT com) (cbfalconer AT XXXXworldnet DOT att DOT net)
   Available for consulting/temporary embedded and systems.
   (Remove "XXXX" from reply address. yahoo works unmodified)
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