Lens now uses the com.sun.javafx.logging package. Note that the Lens class files get compiled on all platforms. This makes it impossible to do the following:

$ hg clone jfx, rt, rt-closed
$ cd jfx/rt-closed/glass/
$ ant

and get just the Glass component built. This was possible before Lens started to use the logging package. Inability to quickly build just Glass heavlily affects productivity of Glass engineers.

This RFE is to restore this possibility. I suggest to detect that the logging package hasn't been built in the Glass build.xml, and build it (and only it, NOT the whole FX) before proceeding with regular Glass build.