GCC version for RTEMS 6? (Can Ada be used?)

[Sebastian Huber]

On 27.04.22 19:25, Frank Kühndel wrote:
> Hello Sebastian,
> 
> On 4/27/22 11:54, Sebastian Huber wrote:
>>> we have to select a GCC version for the RTEMS 6 release. Currently,
>>> GCC 10 is used, however, with the release of GCC 10.4 this year it
>>> will reach its end of life. Other options are GCC 11 and 12. GCC 12
>>> will be released in the next weeks. It has some nice features:
>>>
>>> * Initialization of stack variables:
>>>
>>> https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html#index-ftrivial-auto-var-init
>>>
>>>
>>> * Improved static analysis with -fanalyzer
>>>
>>> * Improved gcov support, with the ability to back port changes from
>>> GCC 13:
>>>
>>> https://gcc.gnu.org/pipermail/gcc-patches/2022-April/593536.html
>>>
>>> * Upstream maintenance for the next three years
>>>
>>> The draw back is that it is brand new.
>> The Ada support is broken in GCC 12 for most targets:
> I do not need ADA but ADA may be worth considering. With GCC 10 one
> needed to have a GNAT 10 compiler installed to build the tools incl.
> --with_ada. I presume, one would need a GNAT 12 to build ADA with the
> GCC 12 sources? The current Fedora 35 has GNAT 11. All other distros I
> know of have GNAT 10 at best (I have not checked on tumbleweed yet).
> OpenSUSE may get ADA 12 from an unusual repro???

There is a GCC development repository for openSUSE which all current GCC 
versions:

https://download.opensuse.org/repositories/devel:/gcc/

> 
> So, if I am not mistaken, switching to GCC 12 will have the effect that
> the "normal" RTEMS ADA user will for quite a while not be able to build
> ADA. I am not sure how important that would be.

I already fixed the Ada build.

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