Broken Cuda

cudnn.h header not found in Ubuntu

when using NVidia’s CUDNN cuddn.h was not avaliable in the default cuda packages in Ubuntu. So building darknet would work but be unbearable slow. The fix was to install 2 packages:

libcudnn7_7.6.5.32–1+cuda10.2_amd64.deb and libcudnn7-dev_7.6.5.32–1+cuda10.2_amd64.deb.