kazu-yamamoto/ghc-mod — pull request #59 by bjin (2012-03-19 14:56:23+00:00)
Title: fix extensions extraction from Cabal buildinfo

When building some Cabal package with `Default-Extensions:` Header
(for example pandoc), `ghc-mod` failed to pass proper `-X` Options.

the definition of `usedExtensions` is

~~~
usedExtensions bi = oldExtensions bi
++ defaultExtensions bi
~~~