package ocaml-env-mingw64

This package is an internal part of the implementation of the OCaml compiler in opam-repository.

This package is used to create an indirection between the OCaml compiler packages and conf-mingw-w64-gcc-i686. The compiler packages must have one of conf-mingw-w64-gcc-i686 or conf-mingw-w64-gcc-x86_64 depending on configuration, but if they directly refer to both packages in their depends fields then the subsequent installation of the other C compiler package would trigger a rebuild of the OCaml compiler package, because it changes its dependency cone. By having the compiler packages instead depend on either ocaml-env-mingw64 or ocaml-env-mingw32, the installation of conf-mingw-w64-gcc-i686 into a switch already containing ocaml-env-mingw64 does not trigger a rebuild of the OCaml compiler, because ocaml-env-mingw32 is not installed.