'quickest' build uses "-O0", and the function is not inlined. As a
result linker reports undefined reference unless 'static' is specified.
@hvr just changed that line in this commit: https://phabricator.haskell.org/rGHCe74a9e994160
@thomie Oh, I see. Thanks. @hvr decided to remove "inline" completely, that makes sense too.
@Yuras, sorry, I only saw this code-rev now after I saw the issue mentioned on #ghc earlier today and simply fixed it up...