On 24/10/15 15:05, Thomas Tuegel wrote:
MIN_VERSION_base is defined by Cabal, so it is not available during bootstrapping. This means we unfortunately need to use __GLASGOW_HASKELL__ in Cabal, even though it isn't really the right macro. It should be safe to use MIN_VERSION_base in cabal-install.
ok, that makes sense, thanks Thomas and Herbert. Herbert also mentioned the qualified import trick to avoid CPP (the "more robust way" on [1]). While it is nifty, i am reluctant to apply it, given the silent/implicit requirement to have at least one reference to the qualified entity. Every contributor to such a module must be aware of this trick or risk accidentally breaking it. The explicitness of CPP seems preferable to me. [1] https://ghc.haskell.org/trac/ghc/wiki/Migration/7.10#GHCsaysTheimportof...is...