Luka

I fixed this error by adding the code `#define ANTLR4CPP_STATIC` at the top of antlr4-common.h. As mentioned [here](https://github.com/antlr/antlr4/blob/0eb38a02d7aa67147bdba23287501d4e5540dfc1/doc/cpp-target.md#code-generation-aspects) in the docs, you need to define ANTLR4CPP_STATIC if you are compiling...