cabal: remove -O2 (discouraged), add -Wcompat for GHC >= 8

andreasabel · andreasabel · commit 8802544d0cb7 · 2021-07-19T14:29:58.000+02:00
diff --git a/regex-posix.cabal b/regex-posix.cabal
@@ -97,5 +97,12 @@ library
   if impl(ghc < 8)
       build-depends: fail == 4.9.*
 
-  ghc-options: -O2
-               -Wall -fno-warn-unused-imports
+  -- Warnings
+
+  ghc-options:
+      -Wall
+      -fno-warn-unused-imports
+
+  if impl(ghc >= 8)
+    ghc-options:
+      -Wcompat
