Add scalac workarounds for Scala 2.12

build.sbt

@@ -222,7 +222,8 @@ def updateWebsiteTag =
 
 lazy val commonSettings = ReleasePlugin.extraReleaseCommands ++ Seq(
   organization := "io.getquill",
-  scalaVersion := "2.11.11",
+  // just for testing
+  scalaVersion := "2.12.2",
   crossScalaVersions := Seq("2.11.11","2.12.2"),
   libraryDependencies ++= Seq(
     "org.scalamacros" %% "resetallattrs"  % "1.0.0",
@@ -318,10 +319,18 @@ lazy val commonSettings = ReleasePlugin.extraReleaseCommands ++ Seq(
         <url>http://github.com/fwbrasil/</url>
       </developer>
     </developers>)
-) ++ update2_12
+) ++ `scala 2.12 hacks`
 
-lazy val update2_12 = Seq(
-  scalacOptions -= (
-    if (scalaVersion.value.startsWith("2.12.")) "-Xfatal-warnings" else ""
-  )
+lazy val `scala 2.12 hacks` = Seq(
+  scalacOptions := {
+    val orig = scalacOptions.value
+    CrossVersion.partialVersion(scalaVersion.value) match {
+      case Some((2, 12)) => Seq("-Xsource:2.11") ++ orig.map {
+        case "-Xlint" => "-Xlint:-unused,_"
+        case "-Ywarn-unused-import" => "-Ywarn-unused:imports,-patvars"
+        case other => other
+      }
+      case _ => orig
+    }
+  }
 )

quill-core/src/test/scala/io/getquill/quotation/QuotationSpec.scala

@@ -842,7 +842,7 @@ class QuotationSpec extends Spec {
       }
       "abritrary" in {
         val q = quote(lift(String.valueOf(1)))
-        q.liftings.`java.this.lang.String.valueOf(1)`.value mustEqual String.valueOf(1)
+        q.liftings.`java.lang.String.valueOf(1)`.value mustEqual String.valueOf(1)
       }
       "duplicate" in {
         val i = 1