Java – cannot prevent ant from generating compiler sun proprietary API warnings

I call javac from this ant script:

<javac srcdir="src" 
   destdir="build/classes" source="1.6" 
   target="1.6" debug="true" encoding="Cp1252"
   Nowarn="true">

But it still raises compiler warnings in the output:

[javac] Compiling 73 source files to C:\IKOfficeRoot\Java\ERP\Framework\build\classes

[javac] C:\IKOfficeRoot\Java\ERP\Framework\src\de\ikoffice\util\LoggerFactory.java:49: warning: sun.reflect.Reflection is Sun proprietary API and may be removed in a future release
[javac]         return Logger.getLogger(Reflection.getCallerClass(2));
[javac]                                 ^
[javac] Note: C:\IKOfficeRoot\Java\ERP\Framework\src\de\ikoffice\db\SingleShotResultSet.java uses or overrides a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
[javac] 1 warning

I tried, too

<compilerarg line="-Xlint:-unchecked -Xlint:-deprecation"/>

and

<compilerarg value="-Xlint:none"/>

But it has no effect How do I clear warnings?

Solution

Set - xdignore symbol. The file option is added to the javac command line that works for me