Re: QNX - GNUstep and Objective C

[David Chisnall]

On 25 Oct 2009, at 11:48, bbceler wrote:

> Hi everyone.
> I work in QNX.
> QNX supports officially only gcc4.3 and languages c and c ++ and has  
> own GUI
> - QNX Photon.
> I compile gcc4.4 / gcc4.5 in QNX.
> That is why I have the working on QNX compiler objc. I use to tests  
> objc
> from gcc4.5.0.
> I made the test of writing the program in objc to working in the  
> environment
> Photon. We practically use only language c to the programming in  
> Photon,
> then the transfer on the language objc turned out very simple.
> I porting and compiled on QNX 6.4.1 gnustep-make-2.2.0 and
> gnustep-base-1.19.3.

That's really great - I was wondering if anyone was running GNUstep on  
QNX.  Would it be possible for you to try a recent svn version and  
make sure that the changes to the threading support work with QNX's  
version of pthreads?

> Simple test program work correctly.
> Because I have small knowledge in objc and GNUstep I have the  
> question:
> when I using objc from gcc4.4 / gcc4.5 to use for GNUstep I should use
> gnustep-objc-1.6.0 ?
> and what from http://svn.gna.org/viewcvs/gnustep/libs/libobjc2/ ?
> or the better use libobjc from gcc ?

I should really write something on the web site about this.   
Basically, at the moment, you should use libobjc from GCC if it's  
relatively modern.

The 1.6.0 libobjc in GNUstep is a really old version of GCC libobjc,  
for use with platforms that only support an even older GCC (things  
that Riccardo runs, which only support GCC 2.95).  This should only be  
used if your GCC comes with a broken libobjc.

The libobjc2 is an experimental fork of a recent GCC libobjc, with  
support for a new ABI and a load of other stuff.  I've made some very  
invasive changes in this and they haven't been adequately tested.  I'm  
currently running it, and as of today I can run all of the GNUstep  
apps I have installed with it, but I wouldn't recommend that anyone  
else runs it yet unless you are interested in fixing bugs that you  
encounter, or testing experimental features in clang.

David

-- Sent from my brain