diff options
Diffstat (limited to 'haddock-api/src/Haddock.hs')
| -rw-r--r-- | haddock-api/src/Haddock.hs | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/haddock-api/src/Haddock.hs b/haddock-api/src/Haddock.hs index 3f5e5298..23fefb3b 100644 --- a/haddock-api/src/Haddock.hs +++ b/haddock-api/src/Haddock.hs @@ -439,13 +439,26 @@ withGhc' libDir flags ghcActs = runGhc (Just libDir) $ do _ <- setSessionDynFlags dynflags'' ghcActs dynflags'' where + + -- ignore sublists of flags that start with "+RTS" and end in "-RTS" + -- + -- See https://github.com/haskell/haddock/issues/666 + filterRtsFlags :: [String] -> [String] + filterRtsFlags flgs = foldr go (const []) flgs True + where go "-RTS" func _ = func True + go "+RTS" func _ = func False + go _ func False = func False + go arg func True = arg : func True + + parseGhcFlags :: MonadIO m => DynFlags -> m DynFlags parseGhcFlags dynflags = do -- TODO: handle warnings? - (dynflags', rest, _) <- parseDynamicFlags dynflags (map noLoc flags) + let flags' = filterRtsFlags flags + (dynflags', rest, _) <- parseDynamicFlags dynflags (map noLoc flags') if not (null rest) - then throwE ("Couldn't parse GHC options: " ++ unwords flags) + then throwE ("Couldn't parse GHC options: " ++ unwords flags') else return dynflags' unsetPatternMatchWarnings :: DynFlags -> DynFlags |