libcu++-dev 1.7.0-3 (arm64 binary) in ubuntu lunar

 libcu++ provides a heterogeneous implementation of the C++ Standard Library
 that can be used in and between CPU and GPU code.
 .
 Using libcu++ is as simple as using the C++ Standard Library.
 All that is needed is adding 'cuda/std/' to the start of the Standard
 Library includes and 'cuda::' before any uses of 'std::':
 .
  * #include <cuda/std/atomic>
  * cuda::std::atomic<int> x;