run devsamp examples with 2 ranks each

.github/workflows/cmake.yml

@@ -45,7 +45,9 @@ jobs:
 
     - name: Install prerequisite MacOS packages
       if: ${{ matrix.os == 'macos-latest' }}
-      run: brew install ninja boost eigen open-mpi bison ccache
+      run: |
+        brew install ninja boost eigen open-mpi bison ccache
+        echo "MPIEXEC=/opt/homebrew/bin/mpiexec" >> $GITHUB_ENV
 
     - name: Install prerequisites Ubuntu packages
       if: ${{ matrix.os == 'ubuntu-22.04' }}
@@ -54,6 +56,7 @@ jobs:
         sudo apt-add-repository "deb https://apt.kitware.com/ubuntu/ $(lsb_release -cs) main"
         sudo apt-get update
         sudo apt-get -y install ninja-build g++-12 liblapack-dev libboost-dev libboost-serialization-dev libboost-random-dev libeigen3-dev openmpi-bin libopenmpi-dev libtbb-dev ccache flex bison cmake doxygen
+        echo "MPIEXEC=/usr/bin/mpiexec" >> $GITHUB_ENV
 
     - name: Create Build Environment
       # Some projects don't allow in-source building, so create a separate build directory
@@ -66,7 +69,7 @@ jobs:
       shell: cmake -P {0}
       run: |
         string(TIMESTAMP current_date "%Y-%m-%d-%H;%M;%S" UTC)
-        message("::set-output name=timestamp::${current_date}")
+        echo "name=timestamp::${current_date}" >> $GITHUB_OUTPUT
 
     - name: Setup ccache cache files
       uses: actions/[email protected]
@@ -112,11 +115,11 @@ jobs:
       run: |
         cmake -S $GITHUB_WORKSPACE/doc/dox/dev/devsamp/helloworld -B test_install_devsamp_helloworld -DCMAKE_PREFIX_PATH=${{github.workspace}}/install || (cat test_install_devsamp_helloworld/CMakeFiles/CMakeOutput.log && cat test_install_devsamp_helloworld/CMakeFiles/CMakeError.log)
         cmake --build test_install_devsamp_helloworld
-        test_install_devsamp_helloworld/helloworld-parsec
-        test_install_devsamp_helloworld/helloworld-mad
+        $MPIEXEC -n 2 test_install_devsamp_helloworld/helloworld-parsec
+        $MPIEXEC -n 2 test_install_devsamp_helloworld/helloworld-mad
         cmake -S $GITHUB_WORKSPACE/doc/dox/dev/devsamp/fibonacci -B test_install_devsamp_fibonacci -DCMAKE_PREFIX_PATH=${{github.workspace}}/install || (cat test_install_devsamp_fibonacci/CMakeFiles/CMakeOutput.log && cat test_install_devsamp_fibonacci/CMakeFiles/CMakeError.log)
         cmake --build test_install_devsamp_fibonacci
-        test_install_devsamp_fibonacci/fibonacci-parsec
+        $MPIEXEC -n 2 test_install_devsamp_fibonacci/fibonacci-parsec
         cmake -E make_directory test_install_userexamples
         cat > test_install_userexamples/CMakeLists.txt <<EOF
         cmake_minimum_required(VERSION 3.14)