title: Could NOT find MPI_C and MPI cmake on Ubuntu 18.04
body: <pre><code>- Found PkgConfig: /usr/bin/pkg-config (found version &quot;0.29.1&quot;)
  -- Checking for module 'libusb-1.0&gt;=1.0.17'
  --   Found libusb-1.0, version 1.0.21
  -- Checking for module 'opencv&gt;=3.0'
  --   Found opencv, version 3.2.0
  -- Checking for module 'libcaer&gt;=2.0'
  --   Found libcaer, version 3.3.7
  -- Could NOT find MPI_C (missing: MPI_C_WORKS)
  -- Found MPI_CXX: /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so (found version &quot;3.1&quot;)
  CMake Error at /usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
    Could NOT find MPI (missing: MPI_C_FOUND) (found version &quot;3.1&quot;)
  Call Stack (most recent call first):
    /usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
    /usr/share/cmake-3.10/Modules/FindMPI.cmake:1444 (find_package_handle_standard_args)
    CMakeLists.txt:193 (find_package)
  </code></pre>
  <p>Tried everything exported the paths done everything I've found on google still have this annoying error.</p>
  <pre><code>Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  cmake is already the newest version (3.10.2-1ubuntu2.18.04.1).
  </code></pre>
  <p>Which command results:</p>
  <pre><code>endrel@Siraly:~/Developer/BrainHarmonics/build$ which mpicc
  /usr/bin/mpicc
  endrel@Siraly:~/Developer/BrainHarmonics/build$ which mpicxx
  /usr/bin/mpicxx
  </code></pre>