msgfmt doesn't work with Java 9, when invoked with the --java2 parameter
it fails to detect the JDK and returns this error message:
msgfmt: Java compiler not found, try installing gcj or set $JAVAC
msgfmt: compilation of Java class failed, please try --verbose or set $JAVAC
This issue breaks the build of at least two packages (plm and salliere).
It's possible to reproduce this issue by installing default-jdk/0.59+exp2