it should be an error to use relative directories (#4134)

diff --git a/utils/ghc-pkg/Main.hs b/utils/ghc-pkg/Main.hs
index 03a547d..e110cb4 100644 (file)
--- a/utils/ghc-pkg/Main.hs
+++ b/utils/ghc-pkg/Main.hs
@@ -1296,6 +1296,9 @@ checkDir warn_only thisfield d
  | "$topdir"     `isPrefixOf` d = return ()
  | "$httptopdir" `isPrefixOf` d = return ()
         -- can't check these, because we don't know what $(http)topdir is
+ | isRelative d = verror ForceFiles $
+                     thisfield ++ ": " ++ d ++ " is a relative path"
+        -- relative paths don't make any sense; #4134
  | otherwise = do
    there <- liftIO $ doesDirectoryExist d
    when (not there) $