The December snapshot has been tagged. Binaries will be uploaded soon. A cross-compile is needed for this snapshot; use the boot-2010-11-1-cross.lisp files as the cross-compile script. You will get a restart so just choose the clobber-it restart. The compiler backend structure has changed to add a couple of new slots to hold the foreign linkage address and size. With this change (and a few more that will be coming soon), I can successfully do a cross-compile from x86 (OSX) to sparc.[1] This hasn't worked ever since linkage-tables was added because the linkage addresses of the compiling system were leaking into the target system. Ray [1] However, the resulting system cannot compile itself unless you comment out the callback stuff. I don't know why this happens. But if you do that, it compiles, and the result will also then compile itself with callback stuff enabled.