Implement -fwarn-dodgy-imports

You used to only be able to enable Opt_WarnDodgyImports with -W or -Wall.
This patch adds the flag to en/disable it by name.
(DodgyImports == importing T(..) when only T is exported).

diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs
index d62013a..28943ab 100644 (file)
--- a/compiler/main/DynFlags.hs
+++ b/compiler/main/DynFlags.hs
@@ -1082,6 +1082,7 @@ dynamic_flags = [
 -- these -f<blah> flags can all be reversed with -fno-<blah>
 
 fFlags = [
 -- these -f<blah> flags can all be reversed with -fno-<blah>
 
 fFlags = [

+  ( "warn-dodgy-imports",              Opt_WarnDodgyImports ),

   ( "warn-duplicate-exports",          Opt_WarnDuplicateExports ),
   ( "warn-hi-shadowing",               Opt_WarnHiShadows ),
   ( "warn-implicit-prelude",            Opt_WarnImplicitPrelude ),
   ( "warn-duplicate-exports",          Opt_WarnDuplicateExports ),
   ( "warn-hi-shadowing",               Opt_WarnHiShadows ),
   ( "warn-implicit-prelude",            Opt_WarnImplicitPrelude ),