package-info.java should be compiled if any class in the package is

If I have a package containing some classes and if there is a package-info.java in that package that has annotations, then I would expect that compiling any class in the package would cause the package-info.java to be compiled too. Currently this does not happen, which means that code that depends on the package will only see the annotation if the package-info.java file was compiled explicitly. This is inconsistent with the usual behaviour of javac, which compiles every dependency starting from any source file. Furthermore, there is no way for a Java source file to cause this to happen by referencing package-info explicitly, since package-info is by design not a valid Java identifier.