Sample usage

Author: som-snytt

project/Build.scala

@@ -292,7 +292,9 @@ object Build {
       "-deprecation",
       "-unchecked",
       //"-Wconf:cat=deprecation&msg=Unsafe:s",    // example usage
-      "-Xfatal-warnings",                         // -Werror in modern usage
+      "-Werror",
+      //"-Wunused:all",
+      //"-rewrite", // requires -Werror:false since no rewrites are applied with errors
       "-encoding", "UTF8",
       "-language:implicitConversions",
     ),