try running tests with valgrind in the CI

Fixes #563

.github/workflows/CI.yml

@@ -10,8 +10,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04]
-        gcc_v: [7,8,9,10] # Version of GFortran we want to use.
-        python-version: [3.9]
+        gcc_v: [7,8,9,10,11] # Version of GFortran we want to use.
+        python-version: [3.10]
     env:
       FC: gfortran-${{matrix.gcc_v}}
       GCC_V: ${{matrix.gcc_v}}
@@ -46,7 +46,7 @@ jobs:
       if: contains( matrix.os, 'ubuntu')
       run: |
         python -m pip install --upgrade pip
-        pip install ford FoBiS.py pygooglechart
+        pip install ford FoBiS.py pygooglechart fpm
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
 
     - name: Install GFortran Linux
@@ -60,14 +60,23 @@ jobs:
         --slave /usr/bin/gcov gcov /usr/bin/gcov-${GCC_V}
 
     - name: Compile_with_build
-      if: matrix.gcc_v != 7
+      if: matrix.gcc_v != 7 && matrix.gcc_v != 11
       run: |
         GFORTRAN=gfortran-${{matrix.gcc_v}}
         GCOV=gcov-${{matrix.gcc_v}}
         # build with build.sh, run unit tests
         ./build.sh --skip-documentation
         ./build.sh --skip-documentation --enable-unicode
 
+    - name: Compile_with_FPM
+      if: matrix.gcc_v == 11
+      run: |
+        GFORTRAN=gfortran-${{matrix.gcc_v}}
+        GCOV=gcov-${{matrix.gcc_v}}
+        apt-get update
+        sudo apt update && sudo apt install -y valgrind
+        fpm test --runner "valgrind --leak-check=full --show-leak-kinds=all"
+
     - name: Compile_with_cmake
       # CMake build with unit tests, no documentation, with coverage analysis
       # No unicode so that coverage combined with the build script will cover unicode