On 10/07/2015 01:48 PM, Francesco Ariis wrote:
On Wed, Oct 07, 2015 at 01:34:21PM -0400, Michael Orlitzky wrote:
Instead of using #ifdef to handle four different compilers, keep a branch for each. Git is designed to make this easy, and it's usually trivial to merge changes from the master branch back into e.g. the ghc-7.8 branch. That way the code in your master branch stays clean. When you want to stop supporting an old GHC, delete that branch.
I suspect `cabal install your-library` without CPP would explode in the face of (some of) your users though.
The different branches would have different cabal files saying with which version of GHC they work. If the user has ghc-7.8 installed, then cabal-install (or at least, any decent package manager) should pick the latest version supporting ghc-7.8 to install.