1NOTE: Google original ndk libc.so is lack of some symbol and it will cause error 2as follows: 3 4undefined reference to `__system_property_get' 5 6Please use the libc.so in this directory to fix this issue. 7 8Backup original libc.so in ndk first. Then Put lib.so to: 9path_to_ndk/platforms/android-21/arch-arm64/usr/lib/ 10