title: The CXX compiler identification is unknown - CMake Error at CMakeLists.txt:101
body: <p>I have problems to install a particular module.</p>
  <p>Link to instructions if you want: <a href="https://github.com/dbbs-lab/cereb-nest" rel="nofollow noreferrer">Here</a>.</p>
  <p>Now: I follow exactly the steps.</p>
  <p>The lasts command lines are:</p>
  <pre><code>mkdir $HOME/cereb-nest-build
  cd $HOME/cereb-nest-build
  </code></pre>
  <p>And you can see that the folder path is correct.</p>
  <p>This is the print on terminal:</p>
  <pre><code>(base) myusername@MBP-di-Simone cereb-nest-build % cmake -Dwith:nest=$HOME/opt/anaconda3/envs/nest218/bin/nest-config $HOME/cereb-nest
  -- The CXX compiler identification is unknown
  CMake Error at CMakeLists.txt:101 (project):
    The CMAKE_CXX_COMPILER:
  
      /usr/local/miniconda/conda-bld/nest-simulator_1580129234212/_build_env/bin/x86_64-apple-darwin13.4.0-clang++
  
    is not a full path to an existing compiler tool.
  
    Tell CMake where to find the compiler by setting either the environment
    variable &quot;CXX&quot; or the CMake cache entry CMAKE_CXX_COMPILER to the full path
    to the compiler, or to the compiler name if it is in the PATH.
  
  
  -- Configuring incomplete, errors occurred!
  See also &quot;/Users/myusername/cereb-nest-build/CMakeFiles/CMakeOutput.log&quot;.
  See also &quot;/Users/myusername/cereb-nest-build/CMakeFiles/CMakeError.log&quot;.
  </code></pre>
  <p>And it generate two files:</p>
  <ul>
  <li>CMakeCache.txt</li>
  <li>CMakeFiles Folder (with others files)</li>
  </ul>
  <p>I see every step and every folders that was create but I have this error always.
  I check an update of CMake, I see that this script was tested with CMake 3.2.2 but I can't see new version from 3.19 but can't understand the problem.</p>
  <p>Thank you everyone for answers.</p>