The CUDA compiler is not able to compile a simple test program - c++

Question

I created a template Clion project in CUDA and it does not seem to work at all.
The only thing which I changed is this line in CMakeLists.txt:
set(CMAKE_CUDA_COMPILER "/usr/local/cuda-10.1/bin/nvcc")
So it looks like this:
cmake_minimum_required(VERSION 3.17)
set(CMAKE_CUDA_COMPILER "/usr/local/cuda-10.1/bin/nvcc")
project(test CUDA)
set(CMAKE_CUDA_STANDARD 14)
add_executable(test main.cu)
set_target_properties(
test
PROPERTIES
CUDA_SEPARABLE_COMPILATION ON)
It does not matter if I try to build the program from Clion or terminal, I always get:
CMake Error at /snap/clion/129/bin/cmake/linux/share/cmake-3.17/Modules/CMakeTestCUDACompiler.cmake:46 (message):
The CUDA compiler
"/usr/local/cuda-10.1/bin/nvcc"
is not able to compile a simple test program.
It fails with the following output:
Change Dir: /home/user/CLionProjects/test/cmake-build-debug/CMakeFiles/CMakeTmp
Run Build Command(s):/usr/bin/make cmTC_bafff/fast && /usr/bin/make -f CMakeFiles/cmTC_bafff.dir/build.make CMakeFiles/cmTC_bafff.dir/build
make[1]: Entering directory '/home/user/CLionProjects/test/cmake-build-debug/CMakeFiles/CMakeTmp'
Building CUDA object CMakeFiles/cmTC_bafff.dir/main.cu.o
/usr/local/cuda-10.1/bin/nvcc -x cu -c /home/user/CLionProjects/test/cmake-build-debug/CMakeFiles/CMakeTmp/main.cu -o CMakeFiles/cmTC_bafff.dir/main.cu.o
In file included from /usr/local/cuda-10.1/bin/../targets/x86_64-linux/include/cuda_runtime.h:83,
from <command-line>:
/usr/local/cuda-10.1/bin/../targets/x86_64-linux/include/crt/host_config.h:138:2: error: #error -- unsupported GNU version! gcc versions later than 8 are not supported!
138 | #error -- unsupported GNU version! gcc versions later than 8 are not supported!
| ^~~~~
make[1]: *** [CMakeFiles/cmTC_bafff.dir/build.make:86: CMakeFiles/cmTC_bafff.dir/main.cu.o] Error 1
make[1]: Leaving directory '/home/user/CLionProjects/test/cmake-build-debug/CMakeFiles/CMakeTmp'
make: *** [Makefile:141: cmTC_bafff/fast] Error 2
CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:4 (project)
-- Configuring incomplete, errors occurred!
See also "/home/user/CLionProjects/test/cmake-build-debug/CMakeFiles/CMakeOutput.log".
See also "/home/user/CLionProjects/test/cmake-build-debug/CMakeFiles/CMakeError.log".
I use Ubuntu 20, Clion (2020.2.4) is from the newest snap. I also tried to run it with different versions of gcc and g++ (7, 8 and 9) and CMake (3.17 (snap), 3.18 and 3.19).
Additionally:
Nvidia driver version: 455.23.0
CUDA Version: 11.1
The path /usr/local/cuda-10.1/bin/nvcc is correct.

Answer 1

It started working when I changed the default system gcc alternative from version 9 to 8. (Ubuntu 20 default gcc version is 9)
sudo update-alternatives --config gcc