> I haven't found anything in the docs that I see that explains > the libiberty library.
You didn't find the libiberty documentation? It's separate from the gcc documentation, but available on the gcc docs web page. > Can this be compiled without having to compile a whole new compiler? Er, yes, since that's what we do each time we build it for the build and host machines. Only the target libiberty is built with the just-built compiler. > I am running 3.4.6 and what to cross compile for a pdp-11. I just > want to compile the extra support and that's all. Extra support for what purpose? Are you trying to use libiberty with your own application?