Set GPU_TARGET to the architecture of your card. The default includes Kepler, which causes this error with CUDA 11. See directions in the example make.inc files (e.g., make.inc-examples/make.inc.mkl-icc) or README files.
For example, if using make.inc with a Volta V100 card, set in make.inc:
GPU_TARGET = Volta
If using CMake:
cmake -DGPU_TARGET=Volta ..