Intsall MPI environement before configuring with CMake

.github/workflows/cmake-multi-platform.yml

@@ -54,6 +54,17 @@ jobs:
       run: |
         echo "build-output-dir=${{ github.workspace }}/build" >> "$GITHUB_OUTPUT"
 
+    - name: Install MPI libraries on Ubuntu
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libopenmpi-dev openmpi-bin
+
+    - name: Install MPI libraries on Windows
+      if: matrix.os == 'windows-latest'
+      run: |
+        choco install openmpi -y
+        
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type