"NDK C library"
https://developer.android.com/ndk/guides/stable_apis#c_libra...
"Improving Stability with Private C/C++ Symbol Restrictions in Android N"
https://android-developers.googleblog.com/2016/06/improving-...
"Android changes for NDK developers"
https://android-developers.googleblog.com/2016/06/android-ch...
Termux developers also think they could do whatever they felt like on Android, guess what, they can't.