Steps to build: 1. Download the GCC sources. 2. Patch it with the picochip patch(es). 3. Copy, gunzip, untar script.tgz. 3. copy, gunzip, untar picochip.tgz into gcc/config directory. 4. Make a picochip subdirectory under libgcc/config and copy the t-picochip file from gcc/config/picochip/ to libgcc/config/picochip/ 5. Run "make configure SRC_TREE=path_to_sources". 6. Run "make build". Of course, the general build checks will apply. You need to have gmp/mpfr libraries for building GCC4.4. Contact me (hariharan .at. picochip .dot. com) if you have any trouble with the process.