Add support for selecting C++ dialect and lib.
Add support for selecting C++ dialect and lib.

Otherwise, assume libstdc++ and the compiler's default dialect.

hhua/kore,hhua/kore,korusdipl/kore,jorisvink/kore,zhcy/kore,hhua/kore,jorisvink/kore,bonifaido/kore,bonifaido/kore,fourdollars/kore,bonifaido/kore