Ada: building 4.3 cross-gnattools with gcc-4.2.1

[Joel Sherrill]

Arnaud Charlet wrote:
>> 1) Is it supposed to work? (i.e. building an Ada cross compiler 4.3 by a
>> 4.2 compiler)
>>     
>
> No, as documented, you need a matching native compiler to build a cross Ada
> compiler (e.g. build from the same 4.3 sources a native compiler first, and
> then use it to build the cross compiler).
>
>   
That's what I have been doing.  My procedure is:

+ build a native
+ build a C/C++ cross
+ build the Ada cross

With that I have managed to build 4.2.x and SVN trunk
and post ACATS for PowerPC, SPARC, and i386 on RTEMS.
SPARC and PowerPC look very good.  I am using qemu to
test the i386 and something isn't  quite right for i386.
It looks like it branches off to never never land and then
gets a fault. I haven't had a chance to look into it yet.

I posted results to gcc-testresults.

--joel
>> 2) does it work to build 4.3 cross-gnattools with the current 4.3 Ada
>> compiler?
>>     
>
> It does in general. I do not know for avr in particular.
>
>   
>> 3) Would a patch be accepted that makes the 4.3 gnattols be compilable
>> by 4.2 compiler?
>>     
>
> In general, no. On a case by case basis, assuming the patch is simple and
> does not make the code worse in terms of maintenance, then it can be OK.
>
> Arno
>   


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