I downloaded PowerTop ver. 2.0 and attempted to build it with: ./autogen.sh then ./configure The configure script is not finding "LIBNL" and nl_socket_alloc. My Fedora 17 installation seems to have libnl and the looked-for symbol: $ rpm -qa | grep libnl libnl3-3.2.7-1.fc17.x86_64 libnl-1.1-15.fc17.x86_64 And, nl_socket_alloc is defined in (at least) the 64-bit library /usr/lib64/libnl-3.so.200: $ nm --dynamic /usr/lib64/libnl-3.so.200 | grep nl_socket_alloc 00000039c360f740 T nl_socket_alloc 00000039c360f6d0 T nl_socket_alloc_cb Is this something that the Fedora 17 distribution has changed in the libnl naming string -- again? -- james.d.howard(a)intel.com Principal Engineer //Intel/SSG/DRD/PAE/FACE/DCE +1-503-712-8608