Does Boost.Spirit or Antlr support Left-recursive grammars

In my experience, forcing a grammar representation to not be left-recursive tends to be unintuitive or cumbersome in many cases.

I am surveying various parser generator frameworks and I am currently reading about Antlr and Boost.Spirit.

Do either of them support left-recursive grammars? In general, which one supports more powerful grammars?

Thanks!