dev-haskell/ghc-check
detect mismatches between compile-time and run-time versions of the ghc api
USE Flags
+package-abis
* This flag is undocumented *
doc
Global: Adds extra documentation (API, Javadoc, etc)
hscolour
* This flag is undocumented *
hoogle
* This flag is undocumented *
profile
Global: Adds support for software performance analysis (will likely vary from ebuild to ebuild)