On the page: http://clfs.org/view/clfs-embedded/arm/materials/packages.html , the mpc tarball url is given as: http://www.multiprecision.org/mpc/download/mpc-1.0.3.tar.gz Looks like that should now be: https://ftp.gnu.org/gnu/mpc/mpc-1.0.3.tar.gz (Yes, a newer version is out, etc, etc.) Maybe likewise for other variants of clfs. akh --