Snapshot gcc-12-20211219 is now available on
  https://gcc.gnu.org/pub/gcc/snapshots/12-20211219/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.

This snapshot has been generated from the GCC 12 git branch
with the following options: git://gcc.gnu.org/git/gcc.git branch master revision fcbf94a5be9e0c1ecad92da773a6632b86b7f70a

You'll find:

 gcc-12-20211219.tar.xz               Complete GCC

  SHA256=a0052f408fe84f4bb3fad6faefd806a6ff999caa6a4de2add9e53b475f82ad49
  SHA1=484e0fddc2601bdd7406898b51818ad957a88810

Diffs from 12-20211212 are available in the diffs/ subdirectory.

When a particular snapshot is ready for public consumption the LATEST-12
link is updated and a message is sent to the gcc list.  Please do not use
a snapshot before it has been announced that way.