[LLVMdev] Link error when I compile the Toy(kaleidoscope) example

[Tim Northover]

> undefined reference to `typeinfo for llvm::CmpInst'
> clang-3.7: error: linker command failed with exit code 1 (use -v to see
> invocation)

Looks like an error from the toy being built with -frtti but LLVM with
-fno-rtti. Try this if you're not actually using the typeinfo:

$ clang++ -g -O3 toy.cpp `llvm-config --cxxflags --ldflags
--system-libs --libs core` -fno-rtti -o toy

I've never been quite sure why that flag isn't part of "llvm-config --cxxflags".

Tim.