time library dependencies

[Ashley Yakeley]

Malcolm Wallace wrote:
> OK, I object to the proposed change.  The time library is pretty core,
> and should continue to be buildable by compilers and interpreters other
> than GHC.  This does not necessarily mean it must be strictly H'98
> compliant, but that would be a good approximation of the common
> language.

What is that "good approximation"?

These are the options:

1. time to require Haskell 98 + FFI + Rank2Types, include Data instances

2. time to require Haskell 98 + FFI + CPP, content depends on compiler

3. time to require Haskell 98 + FFI, a time-extras package with orphan 
Data instances

-- 
Ashley Yakeley