What does gcc say if you run it by hand?
```
/home/jimmy/Programs/android-toolchain-arm64/aarch64-linux-android/bin/aarch64-linux-android-gcc
-o /home/jimmy/Developments /Nim/Hello/Hello
/home/jimmy/Developments/Nim/Hello/nimcache/system.o
/home/jimmy/Developments/Nim/Hello/nimcache/Hello.o
--sysroot=/home/jimmy/Programs/android-ndk-r10e/platforms/android-21/arch-arm64/sysroot
-ldl
```