Comment 2 for bug 900760

Yes, it fixes the problem _for me_, and I think it is definitely an improvement. But I'm not sure it will fix the problem for everyone: I don't know what could happen if someone, with lib64/libboost installed, will try to build a 32 bit version of Fenics; the same for an installed 32 bit version of libboost and a 64 bit version of Fenics. The dynamic linker will likely refuse to link, but perhaps with a somewhat cryptic message...