Add codecov step

Author: schwitanski

.github/workflows/ci.yml

@@ -19,9 +19,11 @@ jobs:
   build:
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04, macos-latest]
         compiler: [gcc, clang]
+        generator: [Ninja, Unix Makefiles]
         exclude:
           - os: macos-latest
             compiler: gcc
@@ -34,7 +36,7 @@ jobs:
         if: runner.os == 'Linux'
         run: |
           sudo apt-get update
-          sudo apt-get install -y cmake lcov gfortran
+          sudo apt-get install -y cmake lcov gfortran ${{ matrix.compiler }}
       
       - name: Install CMake, lcov on macOS
         if: runner.os == 'macOS'
@@ -45,13 +47,13 @@ jobs:
       - name: Configure and build
         run: |
           mkdir build && cd build
-          cmake .. -DENABLE_COVERAGE=On
+          cmake .. -G ${{ matrix.generator }} -DENABLE_COVERAGE=On
           make
           make gcov lcov test
 
-      - name: lcov report
-        uses: actions/upload-artifact@v4
-        with:
-          name: code-coverage-report
-          path: ./build/lcov
-
+      # - name: Codecov upload
+      #   uses: codecov/codecov-action@v5
+      #   with:
+      #     name: codecov-coverage
+      #     token: ${{ secrets.CODECOV_TOKEN }}
+      #     fail_ci_if_error: true