Linker error: /usr/bin/ld: cannot find -lcudart_static while trying to compile CUDA code with clang

I tried to compile a axpy.cu file as specified in the official docs here:

clang++ axpy.cu -o exec --cuda-gpu-arch=sm_60 -L/usr/local/cuda -lcudart_static -ldl -lrt -pthread

But that gave a linker error and warning:

clang: warning: Unknown CUDA version. cuda.h: CUDA_VERSION=11060. Assuming the latest supported version 10.1 [-Wunknown-cuda-version]

/usr/bin/ld: cannot find -lcudart_static

clang: error: linker command failed with exit code 1 (use -v to see invocation)

I have clang version 11 installed. On running:

nvidia-smi

I get:

I read somewhere that I need to add a symbolic link to libcudart file or something if that helps.

I get the following output on running:

ld -lcudart_static --verbose

attempt to open /usr/local/lib/x86_64-linux-gnu/libcudart_static.so failed
attempt to open /usr/local/lib/x86_64-linux-gnu/libcudart_static.a failed
attempt to open /lib/x86_64-linux-gnu/libcudart_static.so failed
attempt to open /lib/x86_64-linux-gnu/libcudart_static.a failed
attempt to open /usr/lib/x86_64-linux-gnu/libcudart_static.so failed
attempt to open /usr/lib/x86_64-linux-gnu/libcudart_static.a failed
attempt to open /usr/lib/x86_64-linux-gnu64/libcudart_static.so failed
attempt to open /usr/lib/x86_64-linux-gnu64/libcudart_static.a failed
attempt to open /usr/local/lib64/libcudart_static.so failed
attempt to open /usr/local/lib64/libcudart_static.a failed
attempt to open /lib64/libcudart_static.so failed
attempt to open /lib64/libcudart_static.a failed
attempt to open /usr/lib64/libcudart_static.so failed
attempt to open /usr/lib64/libcudart_static.a failed
attempt to open /usr/local/lib/libcudart_static.so failed
attempt to open /usr/local/lib/libcudart_static.a failed
attempt to open /lib/libcudart_static.so failed
attempt to open /lib/libcudart_static.a failed
attempt to open /usr/lib/libcudart_static.so failed
attempt to open /usr/lib/libcudart_static.a failed
attempt to open /usr/x86_64-linux-gnu/lib64/libcudart_static.so failed
attempt to open /usr/x86_64-linux-gnu/lib64/libcudart_static.a failed
attempt to open /usr/x86_64-linux-gnu/lib/libcudart_static.so failed
attempt to open /usr/x86_64-linux-gnu/lib/libcudart_static.a failed
ld: cannot find -lcudart_static
attempt to open /usr/local/lib/x86_64-linux-gnu/libcudart_static.so failed
attempt to open /usr/local/lib/x86_64-linux-gnu/cudart_static.a failed
attempt to open /lib/x86_64-linux-gnu/libcudart_static.so failed
attempt to open /lib/x86_64-linux-gnu/cudart_static.a failed
attempt to open /usr/lib/x86_64-linux-gnu/libcudart_static.so failed
attempt to open /usr/lib/x86_64-linux-gnu/cudart_static.a failed
attempt to open /usr/lib/x86_64-linux-gnu64/libcudart_static.so failed
attempt to open /usr/lib/x86_64-linux-gnu64/cudart_static.a failed
attempt to open /usr/local/lib64/libcudart_static.so failed
attempt to open /usr/local/lib64/cudart_static.a failed
attempt to open /lib64/libcudart_static.so failed
attempt to open /lib64/cudart_static.a failed
attempt to open /usr/lib64/libcudart_static.so failed
attempt to open /usr/lib64/cudart_static.a failed
attempt to open /usr/local/lib/libcudart_static.so failed
attempt to open /usr/local/lib/cudart_static.a failed
attempt to open /lib/libcudart_static.so failed
attempt to open /lib/cudart_static.a failed
attempt to open /usr/lib/libcudart_static.so failed
attempt to open /usr/lib/cudart_static.a failed
attempt to open /usr/x86_64-linux-gnu/lib64/libcudart_static.so failed
attempt to open /usr/x86_64-linux-gnu/lib64/cudart_static.a failed
attempt to open /usr/x86_64-linux-gnu/lib/libcudart_static.so failed
attempt to open /usr/x86_64-linux-gnu/lib/cudart_static.a failed

Can someone help with this?

Solution

So I found a solution. Apparently the linker wasnt able to locate libcudart binary. So used find to get its location:

find /usr/ -name libcudart_static*

Got its path as:

/usr/local/cuda-11.6/targets/x86_64-linux/lib/libcudart_static.a

(might be different for you).

Just linked this path by using -L flag in the compilation command. New command:

clang++ axpy.cu -o exec --cuda-gpu-arch=sm_60 -L/usr/local/cuda -L/usr/local/cuda-11.6/targets/x86_64-linux/lib/ -lcudart_static -ldl -lrt -pthread