debian@beaglebone:~/emscripten$ ./emcc
WARNING  root: LLVM version appears incorrect (seeing "version", expected "3.3")
WARNING  root: could not check fastcomp: [Errno 2] No such file or directory
INFO     root: (Emscripten: Running sanity checks)
CRITICAL root: Cannot find /usr/bin/llvm-link, check the paths in ~/.emscripten