It is a bit obscure. I let it build the ones it wants to build by default. This gives me the flexibility of deciding later when building Mercury programs what I

It is a bit obscure. I let it build the ones it wants to build by default. This gives me the flexibility of deciding later when building Mercury programs what I want as a backend. This blog post describes some of them: https://adventuresinmercury.blogspot.co.nz/2011/11/making-grade.html https://adventuresinmercury.blogspot.co.nz/2011/11/making-gr...