a little late to the party, but luajit is broken with clang because it needs special libunwind support or something. that's the story so far.
anyway, looking closer at luajit I notice that "external" unwinding is only the default on amd64. i386 and others use internal unwinding. one can also disable unwinding by defining LJ_NO_UNWIND. anyway, that's what I did, and things seem to work fine. there's a long comment in src/lj_err.c that lays out the pros and cons of each approach, mostly less c++ compat. i personally don't much care, and if it only works on one architecture, I'd say it's questionable to rely on this feature. maybe we can live without unwind in luajit?
