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I got running: Processing 2 2.2.1 on Java 7 SE for Embedded Processing 3 3.0a8 on Java 8 for ARM
P2 has some LWJGL issues, tried to supply native libs for ARM with no luck P3 is using JOGL, which already contains native ARM libs.
I have 2D + 3D acceleration. Quake 3 Arena, glmark, Arduino IDE - everything is working. But in Processing, only examples without P3D scenes do work.
Following error is printed: libGL error: MESA-LOADER: malformed or no PCI ID libGL error: failed to create dri screen libGL error: failed to load driver: pvr libGL error: failed to load driver: swrast
pvr stands for PowerVR driver on CC-A80 octa-core :-)
Also it would be great if you would update all your core libs. For example jssc.jar - the official latest release already contains ARM native libs and serial starts working just by replacing this file: https://code.google.com/p/java-simple-serial-connector/ in Processing libraries folder.
It's great Oracle discontinued Java 7, it has made you to upgrade to Java 8 very quickly without reading bs in documentation that there is no need for it :-D :-D :-D ...anyway I'm creative dev with several ARM boards from various vendors, so I can hack your IDE through ARM support. This is the only issue I couldn't solve in time alone.