1*437bfbebSnyanmisakaNOTE: Google original ndk libc.so is lack of some symbol and it will cause error 2*437bfbebSnyanmisakaas follows: 3*437bfbebSnyanmisaka 4*437bfbebSnyanmisakaundefined reference to `__system_property_get' 5*437bfbebSnyanmisaka 6*437bfbebSnyanmisakaPlease use the libc.so in this directory to fix this issue. 7*437bfbebSnyanmisaka 8*437bfbebSnyanmisakaBackup original libc.so in ndk first. Then Put lib.so to: 9*437bfbebSnyanmisakapath_to_ndk/platforms/android-21/arch-arm64/usr/lib/ 10