On Sat, Nov 27, 2010 at 9:59 AM, Jinjing Wang
Thanks Michael,
So the user should use `cabal install --flags -ghc7 package-name` to install the package, if I'm not mistaken?
Will it work if the package is installed as a dependency? Will the flag environment be passed down from the root package?
Is there a way to detect GHC version automatically?
I see that others have provided answers on here, but another way is to change the check from: if flag(ghc7) build-depends: base >= 4.3 && < 5 cpp-options: -DGHC7 else build-depends: base >= 4 && < 4.3 to this: if impl(ghc >= 7) build-depends: base >= 4.3 && < 5 cpp-options: -DGHC7 else build-depends: base >= 4 && < 4.3 I hope that helps, Jason