RFR JDK-8129562: JDK 9 build using boot-jdk classes instead of newly compiled classes

[Jan Lahoda]

Hi,

Bug:
https://bugs.openjdk.java.net/browse/JDK-8129562

As part of the fix for JDK-8054717, CompileJavaModules.gmk is now using 
an "empty" bootclasspath (classes like java.lang.Object are loaded from 
the ordinary classpath as needed). Unfortunately, javac is still using 
the default ext and endorsed dirs (if available in the boot JDK), and 
classes that are in the ext dirs have precedence over the classes from 
the classpath. Which may cause compilation problems with the ext dirs 
contain an older version of a class.

The proposal is to make ext and endorsed dirs "empty" as well (both ext 
and endorsed dirs will contain one entry, and the entry will be an empty 
directory):
http://cr.openjdk.java.net/~jlahoda/8129562/webrev.00/

What do you think?

Thanks,
     Jan