Supported versions of GHC?

[andrewthad]

Is the oldest supported version of GHC specified anywhere. There's some CPP code in primitive that changes the implementation of functions if GHC is at least version 7.2, but the travis build only goes back to 7.4. If primitive is supposed to build with GHC 7.0, this should be done by travis since no one is going to want to do that by hand when examining PRs. Alternatively, if primitive only supports GHC 7.4 and up, the CPP should be removed. Either way, the haddocks and the github readme should be explicit about which versions of GHC are supported.

[RyanGlScott]

The oldest version of GHC that is supported is 7.4, as indicated by the lower version bounds on base:

primitive/primitive.cabal

Line 50 in d70d9ad

Build-Depends: base >= 4.5 && < 4.12

Which 7.2–specific CPP are you referring to?

[RyanGlScott]

Ah, there do appear to be some lingering __GLASGOW_HASKELL__ >= 702 bits lying around. We should remove those.

[andrewthad]

Sorry I forgot to get back to you on this. It seems like you found the pre-7.2 shims for copying ByteArrays.