Builds fails on CUDA12.1

[maawad]

Running on GeForce RTX 3080 GPU CUDA 12.1 C++17 CMake version 3.26.3 Although the g++ compiler is version 9.4.0 on Ubuntu 20.04, CMake is using CXX STANDARD 17 so it should be compiling with -std=c++17.

I am getting namespace errors such as the following when running 'make -j' in these instructions:

/MVGpuBTree/include/btree_kernels.hpp(79): error: name followed by "::" must be a class or namespace name
attribute((shared)) cg::experimental::block_tile_memory<4, btree::reclaimer_block_size_> block_tile_shemm;