title: Could not find any cudnn.h matching version '8' in any subdirectory
body: <p>For some specific purpose, I am building TF 1.14 <strong>from source</strong> with CUDA 11.1, CUDNN 8.0.4 &amp; TensorRT 7.2 on Ubuntu 16.04 but getting an error:-</p>
  <p><a href="https://i.stack.imgur.com/ne5JT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ne5JT.png" alt="enter image description here" /></a></p>
  <p>I have verified that CUDNN is installed at /usr/include/cudnn.h and following <a href="https://stackoverflow.com/questions/31326015/how-to-verify-cudnn-installation#:%7E:text=Install%20CuDNN&amp;text=For%20most%20people%2C%20it%20will,check%20it%20with%20which%20nvcc%20.">this stackoverflow answer</a> I have copy pasted cudnn.h file at /usr/local/cuda/ and &quot;libcudnn8_8.0.4.30-1+cuda11.1_amd64.deb&quot; , &quot;libcudnn8-dev_8.0.4.30-1+cuda11.1_amd64.deb&quot; files to to /usr/local/cuda.  Can anyone please help me?</p>
  <p>As a side note, which I think probably not the cause of this issue; there are two CUDNN and CUDA versions installed on the machine.</p>