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From: JCS <SANS.SPAM@MERCI.FR>
Subject: Re: GNAT and no runtime
Date: Fri, 28 May 2004 17:13:51 +0200
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Date: 2004-05-28T17:14:04+02:00
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On Wed, 26 May 2004 00:46:26 -0700, Rolf Ebert wrote:
> I cannot answer your detailed questions.  I once had a look at the
> GNAT runtime, too.  A good starting point is the private part of
> system.ads and the corresponding explanations in targparm.ads.
> 
> Start slowly putting more and more things to your runtime.  You almost
> certainly already have system.ads and some dummy (i.e. empty)
> libgnat.a.  That is needed even in the case of No_Runtime.   You can
> easily add things like a-uncconv, s-stoele, interface, s-maccod.  They
> all just need to be present at compile time, but aren't needed at link
> time (OK, the .ali's are, not the .o).

OK, I've finally been able to implement the minimal runtime, and it seems
to work (I've not yet tested if stack-checking is working, but it
shouldn't be too hard to make it working). I've made very little changes,
and implemented a stupid heap, that was needed.

The only thing that is still boring is that gcc makes some "memcpy" calls
when optimisation is turned on. I've so made one, but do you know a way to
avoid gcc make those calls and generate code instead?

Regards,
JC