I wouldn't be at all surprised if you had to do quite a bit of work to make the ogg code callable from within the kernel (as it would be called from HiJack).

I was looking at this for an embedded Ipaq solution.

Very little of libc is used by Tremor--the big ones are the malloc calls, which are all abstracted in config.h so you could easily wrap kmalloc instead, and the libc FILE * stuff, but there's an alternate entry point that lets you define your own file operation callbacks so you can avoid the hosted ANSI C stuff entirely.

There are a very few string.h calls that are easy to replace, no *printf* except in an example program. Obviously no fp math, but also nothing from libm.

It's really as clean as one could hope from this standpoint.

Sumner