[Q] lib *.so files: armeabi or armeabi-v7a ???

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http://forum.xda-developers.com – Hi Some apps uppon installation, make use of lib files. Keyboards for example. If i want to include those apps in my rom to be installed automatically, I need to copy the *.so files from inside the apk to system/lib. Now for my dilemma: Inside the apk I can find a lib folder with 2 subfolders armeabi and armeabi-v7a. I noted that either *.so files work from either directory (armeabi or armeabi-v7a). But which of the two is more optimized for SGS2 armeabi or armeabi-v7a ??? Thanks (HowTos)