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The Parboiled project: http://wiki.github.com/sirthias/parboiled/ is not detected automatically by the Autoproject, which is not surprising, considering it uses the following in the Ant script: <taskdef name="javacn" classname="org.parboiled.ant.Javacn"> .... </taskdef> <target name="compile" description="Compile main and example sources"> <mkdir dir="build/classes"/> <javacn debug="on" destdir="build/classes" source="1.5" target="1.5" encoding="utf8"> <src location="src"/> <src location="examples"/> <classpath refid="compile.classpath"/> <compilerarg line="-Xlint:all -Xlint:-serial"/> </javacn> </target> I.e. it does not use the javac task, rather it has its own wrapper around javac. Still, it would be nice if this was somehow supported (not sure how).
Could probably relax the sniffing a bit to assume that any task whose name contains "javac" as a substring - <xjavac>, <javacn>, etc. - is really a javac variant and the basic attributes have the same meaning. (In this case, <javacn> is just a variant of the IDEA compiler to handle org.jetbrains.annotations.*.)
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss