GCC version for RTEMS 6?

[Sebastian Huber]

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.

> 
> 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

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