To build and install the uClibc development environment, 1) cp ./extra/Configs/Config.<your arch> ./Config 2) Edit ./Config for your setup. 3) make 4) make install_dev (as root if necessary, depending on your Config) To install the runtime environment, make install_target (again, as root if necessary) To compile programs with uClibc, export PATH={uClibc DEVEL_PREFIX/ROOT_DIR}/bin:$PATH and then just ./configure and make as usual. Note: You may also want to look at extra/gcc-uclibc/gcc-uclibc.c for additional information concerning what options and environment variables the gcc wrapper handles.