--- Turn the -B<dir> option to gcc into the GCC_EXEC_PREFIX env var, to
--- workaround a bug in MinGW gcc on Windows Vista, see bug #1110.
-getGccEnv :: [Option] -> IO ([Option], Maybe [(String,String)])
+-- If the -B<dir> option is set, add <dir> to PATH. This works around
+-- a bug in gcc on Windows Vista where it can't find its auxiliary
+-- binaries (see bug #1110).
+getGccEnv :: [Option] -> IO (Maybe [(String,String)])