[GROOVY-11105] Support jdk-release option for configuring the target JDK release for @CompileStatic compilations

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Compiler
• Assignee: Unassigned
• Reporter: Vladimir Sitnikov
• Created: 19/Jun/23 07:00
• Updated: 19/Jun/23 16:26

Description

See the motivation and description in Kotlin: https://youtrack.jetbrains.com/issue/KT-29974/Add-a-compiler-option-Xjdk-release-similar-to-javacs-release-to-control-the-target-JDK-version
 
Sample code that requires jdk-release option for a proper compilation, and it could not be solved with "target bytecode version" alone.

@groovy.transform.CompileStatic test() {
  def bb = java.nio.ByteBuffer.wrap(new byte[8])
  // it should compile to invokevirtual Buffer.flip()Ljava.nio.Buffer;
  // when compiling for Java 1.8 since Java 1.8 does not have ByteBuffer flip() override in ByteBuffer
  // However, if the build uses JDK17 for execution, then it contains ByteBuffer flip() override,
  // and Groovy would compile it to invokevirtual ByteBuffer.flip()Ljava.nio.ByteBuffer
  // which would fail to execute in Java 1.8
  bb.flip()
}
test()

See https://www.morling.dev/blog/bytebuffer-and-the-dreaded-nosuchmethoderror/
See https://stackoverflow.com/a/61267496/1261287