Gradle 3.4 is failing to build JFX.
Our current supported build is with 3.1 with 3.2.1 known to work.

The error message indicates that gradle 3.4 has changed the javac compile options in a fashion that does not play well with out current modular build workaround.

We need to understand this change so we can move forward as gradle becomes more JDK 9 aware. (and get rid of _JAVA_OPTION)