[Bf-committers] Fedora 20 linking broken in cmake on libboost_filesystem

[Dan Eicher]

Hi all,

The fine folks at redhat never fail to disappoint and broke the build
again with this update to the boost libs:

* Fri Jul 26 2013 Petr Machata <pmachata at redhat.com> - 1.53.0-12

  - There's no physical difference between single-threaded and
    multi-threaded builds, except some libraries are only built in
    multi-threaded mode.  So build everything in multi-threaded mode,
    and ditch tagged layout, which we don't need anymore.
    https://bugzilla.redhat.com/show_bug.cgi?id=971956


The fix is to set Boost_USE_MULTITHREADED to "OFF" -- suppose we need a
flag for that now instead of having it hardcoded to "ON".

Dan