The classpath exception is when the library is linked. Because Android DEXing involves converting all third party libraries to a single classes.dex file, this i

The classpath exception is when the library is linked. Because Android DEXing involves converting all third party libraries to a single classes.dex file, this is contrary to most definitions of "linked". So using Retropiler will probably out you in violation of the GPL unless you can win in court saying that it is only linked. Edit: technically dalvik and ART actually execute code from .odex and .oat files