Snapshot gcc-12-20211226 is now available on
  https://gcc.gnu.org/pub/gcc/snapshots/12-20211226/
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 d87483015d476a95f521f0c9dcf6988ca889063b

You'll find:

 gcc-12-20211226.tar.xz               Complete GCC

  SHA256=f1eb267eee673b31b059d6db3ab0880d6d056aa722fc875ba35384b537483f6c
  SHA1=3fd1532c84057eb6e5acba682a19517affcb3351

Diffs from 12-20211219 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.