Summary:
This patch changes the CMake files for Clang and Libomptarget to query the
system for its supported CUDA architecture. This makes it much easier for the
user to build optimal code without needing to set the flags manually. This
relies on the now deprecated FindCUDA method in CMake, but full support for
architecture detection is only availible in CMake >3.18
Reviewers: jdoerfert ye-luo
Subscribers: cfe-commits guansong mgorny openmp-commits sstefan1 yaxunl
Tags: #clang #OpenMP
Differential Revision: https://reviews.llvm.org/D87946
d564409946