For native code, we have a system to turn of individual warnings on a per-library basis. We should have a similar system for Java compilation.

The suggestion is to introduce a DISABLED_WARNINGS argument to SetupJavaCompilation. We could then be able to express something like:

jdk.xml.ws_DISABLED_WARNINGS := rawtypes deprecation finally

to get the jdk.xml.ws module to compile with '-Xlint:all,-rawtypes,-deprecation,-finally'

As an addition, we can also filter out the annoying:
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

and so finally achieve a true warning-free build.