GCC 14 in -current status: almost ready

[matthew green <mrg%eterna23.net@localhost>]

hi folks.


avid readers of source-changes will have notiecd GCC 14 action has been
happening lately.  we're at the point that amd64 works, most things may
build but some platform specific issues will crop up.

arm64 has a weird ctf issue and doesn't build yet.

i don't recommend using it yet, but if you're keen, you can try builds
with -V HAVE_GCC=14 and see what happens.  i'll be pushing out builds
for most targets in the coming days, and will update 
external/gpl3/gcc/README.gcc14 as things happen.

please report build issues without HAVE_GCC=14, but do expect it to
fail for most ports at this point, unless it's listed in README.gcc14
as supposed to be working.

thanks.


.mrg.