> gcc 12 snapshot has landed as the system compiler into rawhide
today.
> GCC 12 is going to enter its stage4 development phase (only regression
> and documentation bugfixes allowed) on Monday 17th, so there should be
> just those bugfixes and not new features etc. anymore.
>
https://gcc.gnu.org/gcc-12/changes.html lists important changes,
> most important is probably that vectorization is enabled at -O2 now
> which is the option with most of the distribution is built with.
>
>
https://gcc.gnu.org/gcc-12/porting_to.html is so far incomplete and lists
> some cases where people need to adjust their code. Other things
> include the usual C++ header changes, where previously some standard
> header included some other header as an implementation detail but it doesn't
> any longer and so code that relied on such indirect include that isn't
> required by the standard needs to include the header that provides whatever
> it relies on. Or e.g. packages using -Werror where new warnings are
> reported with the newer compiler and -Werror results in build failures.
>
> If there are bugs on the compiler side, please let me know immediately,
> so that those bugs can be fixed before the mass rebuild next week.
>
I suppose I should have checked fedora-devel before trying to chase
down build failures as kernel merge window issues. Kernel builds are
failing in a few places (depending on arch).