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Important stuff:

Hello users of Ubuntu. Recently I have decided to step into the Ethereum mining world and compile ethminer myself. After installing cuda however, I ran into a small problem. While doing sudo cmake --build . after cmake .. -DETHASHCUDA=ON -DETHASHCL=OFF, the console outputted this:

[  0%] Built target BuildInfo.h
[ 29%] Built target devcore
[ 41%] Built target ethash
[ 45%] Building NVCC (Device) object libethash-cuda/CMakeFiles/ethash-cuda.dir/ethash-cuda_generated_ethash_cuda_miner_kernel.cu.o
In file included from /usr/local/cuda/include/cuda_runtime.h:78:0,
                 from <command-line>:0:
/usr/local/cuda/include/host_config.h:119:2: error: #error -- unsupported GNU version! gcc versions later than 5 are not supported!
 #error -- unsupported GNU version! gcc versions later than 5 are not supported!
  ^~~~~
CMake Error at ethash-cuda_generated_ethash_cuda_miner_kernel.cu.o.Release.cmake:222 (message):
  Error generating
  /home/diamond/ethminer/build/libethash-cuda/CMakeFiles/ethash-cuda.dir//./ethash-cuda_generated_ethash_cuda_miner_kernel.cu.o


libethash-cuda/CMakeFiles/ethash-cuda.dir/build.make:63: recipe for target 'libethash-cuda/CMakeFiles/ethash-cuda.dir/ethash-cuda_generated_ethash_cuda_miner_kernel.cu.o' failed
make[2]: *** [libethash-cuda/CMakeFiles/ethash-cuda.dir/ethash-cuda_generated_ethash_cuda_miner_kernel.cu.o] Error 1
CMakeFiles/Makefile2:232: recipe for target 'libethash-cuda/CMakeFiles/ethash-cuda.dir/all' failed
make[1]: *** [libethash-cuda/CMakeFiles/ethash-cuda.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2

Additional info:

I installed CUDA using sudo apt install cuda. It installed nvidia-275 and cuda itself (along with a lot other stuff)

diamondburned
  • 834
  • 2
    IIRC there are some cmake variables you can use to specify a particular gcc to use; try for example adding -D CUDA_NVCC_FLAGS="-ccbin gcc-4.9" (assuming you have gcc-4.9 installed) – steeldriver Jul 19 '17 at 13:39
  • Got it working. sudo apt install gcc-4.9 g++-4.9 then from here, do ls -la /usr/bin/ | grep -oP "[\S]*(gcc|g\+\+)(-[a-z]+)*[\s]" | xargs bash -c 'for link in ${@:1}; do sudo ln -s -f "/usr/bin/${link}-${0}" "/usr/bin/${link}"; done' 4.9 – diamondburned Jul 20 '17 at 06:36

1 Answers1

0

This solved my problem:

sudo rm /usr/local/cuda/bin/gcc
sudo rm /usr/local/cuda/bin/g++
sudo apt install gcc-5 g++-5
sudo ln -s /usr/bin/gcc-5 /usr/local/cuda/bin/gcc
sudo ln -s /usr/bin/g++-5 /usr/local/cuda/bin/g++
Scott
  • 151