GCC version for RTEMS 6?

[Karel Gardas]

Hello,

I'd go with 12 if only a bit possible. Any major compiler change during 
the minor RTEMS release would not look good IMHO. It's way better to do 
major RTEMS version bump together with major compiler version bump and 
stick to that during the RTEMS release live cycle. That's my gut feeling 
about that.

Now, hard evidence. Do we have any table comparing test case results on 
all the (tier 1? /2?) platforms between GCC 10 and 12? That would be 
great to have that to see if there is any major regression in 12 and to 
possibly drive the decision based on hard facts.

Thanks!
Karel

On 4/27/22 08:57, Sebastian Huber wrote:
> Hello,
> 
> 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.
>