+-- these -f<blah> flags can all be reversed with -fno-<blah>
+
+fFlags = [
+ ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
+ ( "warn-hi-shadowing", Opt_WarnHiShadows ),
+ ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
+ ( "warn-missing-fields", Opt_WarnMissingFields ),
+ ( "warn-missing-methods", Opt_WarnMissingMethods ),
+ ( "warn-missing-signatures", Opt_WarnMissingSigs ),
+ ( "warn-name-shadowing", Opt_WarnNameShadowing ),
+ ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
+ ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
+ ( "warn-type-defaults", Opt_WarnTypeDefaults ),
+ ( "warn-unused-binds", Opt_WarnUnusedBinds ),
+ ( "warn-unused-imports", Opt_WarnUnusedImports ),
+ ( "warn-unused-matches", Opt_WarnUnusedMatches ),
+ ( "warn-deprecations", Opt_WarnDeprecations ),
+ ( "fi", Opt_FFI ), -- support `-ffi'...
+ ( "ffi", Opt_FFI ), -- ...and also `-fffi'
+ ( "arrows", Opt_Arrows ), -- arrow syntax
+ ( "parr", Opt_PArr ),
+ ( "th", Opt_TH ),
+ ( "implicit-params", Opt_ImplicitParams ),
+ ( "allow-overlapping-instances", Opt_AllowOverlappingInstances ),
+ ( "allow-undecidable-instances", Opt_AllowUndecidableInstances ),
+ ( "allow-incoherent-instances", Opt_AllowIncoherentInstances ),
+ ( "generics", Opt_Generics ),
+ ( "strictness", Opt_Strictness ),
+ ( "cse", Opt_CSE ),
+ ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
+ ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
+ ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
+ ( "ignore-asserts", Opt_IgnoreAsserts ),
+ ( "do-eta-reduction", Opt_DoEtaReduction ),
+ ( "case-merge", Opt_CaseMerge ),
+ ( "unbox-strict-fields", Opt_UnboxStrictFields )
+ ]
+
+glasgowExtsFlags = [ Opt_GlasgowExts, Opt_FFI, Opt_TH, Opt_ImplicitParams ]
+
+isFFlag f = f `elem` (map fst fFlags)
+getFFlag f = fromJust (lookup f fFlags)
+