add warnings to semantic-ast.cabal

semantic-ast/semantic-ast.cabal

@@ -18,7 +18,25 @@ extra-source-files:  CHANGELOG.md
 
 tested-with:         GHC == 8.6.5
 
+common haskell
+  default-language:    Haskell2010
+  ghc-options:
+    -Weverything
+    -Wno-missing-local-signatures
+    -Wno-missing-import-lists
+    -Wno-implicit-prelude
+    -Wno-safe
+    -Wno-unsafe
+    -Wno-name-shadowing
+    -Wno-monomorphism-restriction
+    -Wno-missed-specialisations
+    -Wno-all-missed-specialisations
+    -Wno-star-is-type
+  if (impl(ghc >= 8.8))
+    ghc-options: -Wno-missing-deriving-strategies
+
 library
+  import:              haskell
   exposed-modules:
   -- other-modules:
   -- other-extensions:
@@ -33,6 +51,7 @@ library
   default-language:    Haskell2010
 
 executable semantic-ast
+  import:              haskell
   main-is:             Main.hs
   -- other-modules:
   -- other-extensions: