GCC version for RTEMS 6?

[Chris Johns]

On 4/5/2022 3:54 pm, Sebastian Huber wrote:
> On 04/05/2022 02:14, Chris Johns wrote:
>> On 3/5/2022 4:56 pm, Sebastian Huber wrote:
>>> Hello,
>>>
>>> I added a back port of the gcov-tool merge-stream patches to GCC 12. You find
>>> some background information here:
>>>
>>> https://gcc.gnu.org/onlinedocs/gcc/Freestanding-Environments.html#Freestanding-Environments
>>>
>>>
>>> A back port to GCC 10 would be quite difficult since the gcov file handling
>>> changed significantly between GCC 10 and 12.
>>>
>>> There is some work in progress to support MC/DC code coverage in gcov:
>>>
>>> https://gcc.gnu.org/pipermail/gcc-patches/2022-March/592065.html
>>>
>>> Back porting this to GCC 12 would be probably feasible.
>>>
>>> It would be nice if we could make the gcov support available for RTEMS 6, but
>>> this is only possible with an update to GCC 12.  Are there any objections to
>>> update the RSB to use the upcoming GCC 12 release for RTEMS 6?
>>
>> Are there any posted test results?
> 
> I did only local test runs on simulators so far.

Did you post the results? It helps having tested results :)

>> How do I build gcc12 with rtems6 and test? I am working on a large complex C++
>> framework with rtems6/gcc10 and it is working well and is stable. If there is a
>> way I can test what I am working on with gcc12 to determine if there are any
>> regressions that would help me decide.
> 
> I updated the RTEMS 7 tools to use the GCC 12 release branch with a gcov back
> port. You can test GCC 12 with a local patch for RTEMS 6:
> 
> diff --git a/rtems/config/6/rtems-default.bset b/rtems/config/6/rtems-default.bset
> index 731c9d8..381f916 100644
> --- a/rtems/config/6/rtems-default.bset
> +++ b/rtems/config/6/rtems-default.bset
> @@ -15,5 +15,5 @@ devel/gmp-6.2.1
>  tools/rtems-gdb-11.2
> 
>  tools/rtems-binutils-2.38
> -tools/rtems-gcc-10-newlib-head
> +tools/rtems-gcc-head-newlib-head
>  tools/rtems-tools-6

Ah ok and thanks. I will take a look and report back. It will take a couple of
days for me to work through this.

It would be nice to be able to handle this without changing anything.

Chris