Re: Ada on ARM

["Joel Sherrill <joel at OARcorp dot com>" <joel dot sherrill at OARcorp dot com>]

Ralf Corsepius wrote:
> On Mon, 2005-11-21 at 17:14 +0100, FrÃdÃric PRACA wrote:
>
> > Hi,
> > I'm currently trying to build an Ada cross compiler for ARM using the arm-rtems
> > target. I tried with GCC 4.0.2 and subversion-version but I failed.
> > What should I know to do this knowing that I already built the C and C++
> > cross-compilers ?
>
>
> 1. Replace your host compiler with the same version you want to build
> cross (Ada requirement).

Definitely critical to any success.

> 2. The standard RTEMS toolchains are multilib'ed, Gnatlib in gcc-4.0.x
> doesn't support multilibs 
> => The only chance you have is to build a non-multilib'ed custom
> RTEMS-GCC.

Instructions from Laurent Guerby are on the RTEMS Wiki.

http://www.rtems.com/wiki/index.php/RTEMSAda

> 3. GNAT from GCC < 4.0.2 did not support the arm. I haven't tried
> gcc-4.0.2 and don't know if anybody has meanwhile added arm-support to
> GNAT.

arm-rtems4.7 does build C, C++, and Ada on the gcc SVN head.  I have 
done no testing beyond that.

> All in all, I think you've lost ... :(

Even if you get a compiler from the head to compile, the gnat tools
seem to misparse target names with a version in them.  You would have to 
compile for arm-rtems to even have a prayer.


> Ralf

--joel