Well, grump. I hadn't tried to build Chameleon in a while and updated from the SVN repo. First the build barfed on unused functions. So I #ifdef'd them out. Then the linker blew up in uClibcxx.
Turns out the problem is Apple's custom version of ld. If code is compiled with Link Time Optimization, and the linker is set to do dead code stripping, the linker fails. Apple is aware of the problem but doesn't seem to have a fix yet.
If you have the latest XCode 5.1 installed on Mavericks 10.9.2, how do you build Chameleon?!
Downgrade to 5.0.1