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From: aiv@euraiv1.UUCP (Eelco van Asperen)
Newsgroups: comp.os.minix
Subject: Re: Turbo C and Minix
Message-ID: <568@euraiv1.UUCP>
Date: Thu, 2-Jul-87 12:19:41 EDT
Article-I.D.: euraiv1.568
Posted: Thu Jul  2 12:19:41 1987
Date-Received: Sat, 4-Jul-87 11:07:52 EDT
References: <1716@marque.UUCP> <7035@beta.UUCP>
Organization: EUR/EF/AIV,PObox 1738,Rotterdam,Neth.
Lines: 41
Summary: how to use Turbo C for Minix cross-development

In article <7035@beta.UUCP>, myxm@beta.UUCP (Mike Mitchell) writes:
> In article <1716@marque.UUCP>, doug@marque.UUCP (harris) writes:
> > Having just received my Borland Turbo C (the T shirt is swell:-),
> > be misunderstood :--).  In particular has anyone used Turbo C
> 
> The answer is yes, however, I am still having problems getting the 
> kernel to link. I have successfully used the Turbo C to create and
> maintain a Minix library of tiny/small memory model routines. When
> I compile something using the tiny memory model, everything seems
> to work fine. I am still having problems figuring out what the deal
> is with the small memory model (separate I&D). But, from what I can
> tell, the Turbo C compiler generates code which is much much smaller
> than that from the Minix C compiler and a little smaller than the
> code from the PC/IX C compiler.

Ain't the net a wonderfull thing; this is the problem I solved late
last night (this morning really). It turns out that Turbo C uses
FAR CALLS (!) for the long-integer routines in the library when you
compile for the Small-model; if you however use the Tiny-model (that
uses the same library, only with a different startup-file), then Turbo C
uses NEAR CALLS as it should. So: compile with the Tiny model (-mt for
tcc) and don't worry about the total size.

As you can imagine, this took a while to find out; only when I was
about to give up, I compiled a test program with the -S option and studied
the resulting assembler-code et voila !

If enough people are interested, we could compile a set of diff's for
use with Turbo C and post them; let's count the votes....

[praise ast...]

Eelco van Asperen
Unix Systems Manager

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Erasmus University Rotterdam             |uucp:mcvax!{eurifb,olnl1}!euraiv1!aiv 
Fac. of Economics, Computer Science Dept.|earn:asperen@hroeur5
PO.box  1738 / 3000 DR  Rotterdam        |       
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