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

[bos]

(Imported from Trac #421, reported by @dcoutts on 2008-12-01)

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.

[bos]

(Imported comment by guest on 2008-12-01)

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 <[email protected]>
  * 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.

[bos]

(Imported comment by @dcoutts on 2008-12-01)

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

[BardurArantsson]

Last report 2008. Is split-obj a thing anymore and is this remotely relevant to current Cabal? Close?

[23Skidoo]

Yes, split-objs is still a thing; the issue should be actually quite easy to fix.