[boost] Cross compiling boost

Hello, I would like to cross-compile boost for XScale based system. Has anybody done this? I need to redefine commands: gcc, g++, ar, ld, as, strip, objdump, etc.. so during build process are executed commands from producer-provided toolchain (this is gcc-3.3.2 that produces binaries for XScale). Thankyou for any help, references to appropriate documentation are welcome. Best regards, bma.