mcasperson

Emscripten does not work with LLVM 3.3, which is provided with Fedora 19. 
Download LLVM 3.2 and Clang from http://llvm.org/releases/. Copy the clang 
source code into tools\clang, and run make (but not make install).

Set LLVM_ROOT='/home/yourname/Development/llvm-3.2.src/Release+Asserts/bin' in ~./emscripten.

sudo yum install nodejs - I found that chromium installed later versions 
of the v8 package, which meant that nodejs would not install. So download 
Node.js from http://nodejs.org/download/.