I have no desire to develope c++ code on plan9 but if there was a simple way to cross compile c++ applications for plan9 that would be great - firefox being the obvious one.
This has been done to death, and the closest we ever came to it (IMHO) was cinap's linuxemu - this allowed you to run the linux firefox, or even opera on plan9. I required the use of fgb's x11 port as a display engine, and so it is perhaps not the most minimal solution however it works. -Steve
