Well, you're under Fedora right ? I don't know dylib but after few researches, it seems to be Mac OS X related. So, my question : why have you this flag ??????? Can you copy & paste the beginning of the "core tests" section from "config.log" ? I would like to verify eveything is ok with your system configuration detection. For example, on my laptop, I have : ## ----------- ## ## Core tests. ## ## ----------- ## configure:2132: checking build system type configure:2150: result: i686-pc-linux-gnu configure:2172: checking host system type configure:2187: result: i686-pc-linux-gnu configure:2253: checking whether make sets $(MAKE) configure:2274: result: yes configure:2331: checking for gcc configure:2347: found /usr/bin/gcc configure:2358: result: gcc configure:2596: checking for C compiler version configure:2603: gcc --version >&5 gcc (GCC) 4.1.2 (Gentoo 4.1.2 p1.1) Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. configure:2606: $? = 0 configure:2613: gcc -v >&5 Using built-in specs. Target: i686-pc-linux-gnu