To make a long story short, for those who haven't heard of it, LLVM is a radical new open source compiler, spearheaded by Apple and used by many other tech giants (Adobe, Ageia,NVIDIA and Oracle come to mind), and it's set to gradually replace GCC and Clang is the C/C++/Obj-C part of LLVM. Among other things, Clang has much better syntax analysis capabilities than GCC as well as much better error output. What I did was use Clang to parse the intermediate .cpp code generated by the equivalent .ino file, instead of using GCC like the Arduino IDE does.
If you're interested, you can find more info on my blog post, here:http://blog.tzikis.com/?p=454. Please let me know if you have any suggestions.
P.S. I definitely don't intend this post as a spam. This is for educational purposes only. I hope it doesn't offend anyone.