Cabal shouldn't try to build split-objs when ghc reports it does not support it

[duncan]

It is possible to build ghc without support for object splitting. In such a case Cabal should refuse to work if the user enables split objs.

All one has to do is to parse the output of ghc --info (which is in a Read/Show format).

See also #24.

[guest]

Note that --info was added in 6.8. I'm not sure what to do with older versions.

Here's the commit in question:

Sun Aug 19 00:37:58 CEST 2007  Ian Lynagh <igloo@earth.li>
  * Implement --info, and change how can_split is defined
  We now get the value of can_split from the SplitObjs setting in the
  build system, rather than working out whether it should be possible
  based on the platform.

[duncan]

With older versions there's nothing we can do, we just have to optimistically assume that it supports split-objs.

[elga]

*  simyo