I compile for WRT3200ACM just for testing the CPU frequency scaling driver for mvebu. You can read (old) discussion about that ( CPU frequency scaling driver for mvebu (WRT3200ACM etc.) ). But I am not publishing a real community build for WRT3200ACM.
WRT32X would run my WRT3200ACM firmware, I think, but would require forcing in sysupgrade. If you want, you can download there my build env and build for WRT32X by yourself.
But that has nothing to with my R7800 build that this thread is about...