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I just set up a Ubuntu. I'm trying to turn the yolo of darknet. and I've got this error.

/usr/local/cuda/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!

Even I tried

sudo apt install gcc-4.9 g++-4.9

I got

Package g++-4.9 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'gcc-4.9' has no installation candidate
E: Package 'g++-4.9' has no installation candidate

It seems that the version error occurs by downloading the recent version. Do you know how to downgrade the gcc version?

desertnaut
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TaeYoon Kim
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    Does this answer your question? [CUDA incompatible with my gcc version](https://stackoverflow.com/questions/6622454/cuda-incompatible-with-my-gcc-version) – rubenvb May 26 '20 at 10:46

1 Answers1

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I solved it!

The Python version control was the cause.

It was resolved by re-establishing and reinstalling the paths of the packages.

TaeYoon Kim
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  • Do you mean you have upgrade the Python version? Which version works at the end? Thanks!! – Cii Dec 14 '20 at 19:26