Snapshot gcc-9-20211021 is now available on
  https://gcc.gnu.org/pub/gcc/snapshots/9-20211021/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.

This snapshot has been generated from the GCC 9 git branch
with the following options: git://gcc.gnu.org/git/gcc.git branch releases/gcc-9 revision 5ed78f8bd84eb696579d928c816bc840664829b2

You'll find:

 gcc-9-20211021.tar.xz                Complete GCC

  SHA256=0935a8ba1f42b262cff3d18785bb0c392f1fd383bbebf56ad3ffe6a240c80161
  SHA1=ebd47f4d8eb612919272d1808487e036b62b4355

Diffs from 9-20211014 are available in the diffs/ subdirectory.

When a particular snapshot is ready for public consumption the LATEST-9
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.