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From: Jerome Hugues <hugues@nephilim-pouet.enst.fr>
Newsgroups: comp.lang.ada
Subject: Re: Gnat and priority level
Date: Tue, 19 Oct 2004 11:50:15 +0000 (UTC)
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In article <4174F7FA.1020705@mailinator.com>, Alex R. Mosteo wrote:
> mferracini wrote:
> Firstly, I think that gnat doesn't target the RT capabilities of 
> RT-Linux, so you'll really have regular non-RT linux threads. Unless 
> someone has a patch for it.

There exists one project on this subject

http://bernia.upv.es/rtportal/apps/rtl-gnat/

Note that I've never tried it, so I cannot comment on which GNAT
version it uses, ACATS results, etc

> Second, you can choose two threading implementations with gnat for linux:
> 
> * linux native threads, whose particularities I don't know but some 
> linux expert could tell you (BTW, using the old 2.4 thread 
> implementation, not the new 2.6 one).
> 
> * fsu-threads (I think) which if I remember correctly are 
> POSIX-compliant or something-else-compliant which native linux's aren't. 

Strict Annex D (real time) compliancy

See

http://gcc.gnu.org/onlinedocs/gnat_ugn_unw/Choosing-between-Native-and-FSU-Threads-Libraries.html

for more details

HTH

-- 
Jerome