Merge pull request #122 from channingwalton/main

Add javaOutputVersion to ScalacOptions for scala >= 3.1.2

Author: lenguyenthanh

lib/src/main/scala/org/typelevel/scalacoptions/ScalaVersion.scala

@@ -45,6 +45,7 @@ object ScalaVersion {
   val V2_13_9  = ScalaVersion(2, 13, 9)
   val V3_0_0   = ScalaVersion(3, 0, 0)
   val V3_1_0   = ScalaVersion(3, 1, 0)
+  val V3_1_2   = ScalaVersion(3, 1, 2)
   val V3_3_0   = ScalaVersion(3, 3, 0)
   val V3_3_1   = ScalaVersion(3, 3, 1)
   val V3_3_3   = ScalaVersion(3, 3, 3)

lib/src/main/scala/org/typelevel/scalacoptions/ScalacOptions.scala

@@ -60,6 +60,19 @@ private[scalacoptions] trait ScalacOptions {
   val feature =
     ScalacOption("-feature", _ => true)
 
+  /** Compile for a specific version of the Java platform. Supported targets: 8, 9, ..., 17, 18.
+    *
+    * The java-output-version flag is supported only on JDK 9 and above, since it relies on the
+    * functionality provided in
+    * [[http://openjdk.java.net/jeps/247 JEP-247: Compile for Older Platform Versions]].
+    */
+  def javaOutputVersion(version: String) =
+    ScalacOption(
+      "-java-output-version",
+      List(version),
+      version => JavaMajorVersion.javaMajorVersion >= 9 && version >= V3_1_2
+    )
+
   /** Compile for a specific version of the Java platform. Supported targets: 8, 9, ..., 17, 18.
     *
     * The release flag is supported only on JDK 9 and above, since it relies on the functionality