make error "undefined reference to symbol 'pthread_condattr_setclock@@GLIBC_2.3.3'"

[LeihouMa]

Hi
Thank you for your excellent paper and code. When I compiled the code using make -j, I met some errors as follows. ChatGPT told me to add -lpthread or SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
to the CMakeLists, but it didn't work.
My compilation env: ubuntu20.04+cmake 3.23+cuda 11.7+cudnn8.5.0. Can anyone tell me how to solve this?