Hello, I managed to cross compile gnumach on my Talos II using a mig installation in a buster chroot. For ppc support I used some modules from the osfmk kernel, which I took from [1]. Much more work will be needed for a working PPC branch.
[1] https://github.com/slp/osfmk-mklinux/tree/master/osfmk/src/mach_kernel -- Tobias Platen <g...@platen-software.de>
