> At our place, we have our own printf-style functions (along with lots of other
> bits of libc), so that we can control that stuff directly.

Yeah, we do the same thing. Also allows cleanly locking out printf on final/release builds. Lots of devs don't - if you have a T10k, boot up Jak and Daxter on it, and watch the TTY literally dump pages and pages of detailed debug info as you play (seen it myself on the US NTSC release, the PAL version might be cleaner). Or more (in)famously, SCEE's Porsche Challenge on PS1 prints out something like "USER IS A BLOODY GIT" if you don't finish the race.