CI: build Linux in static and shared versions

This is the most likely (only) platform where building dynamically might be used.

.github/workflows/linux-gcc13.yaml

@@ -7,8 +7,15 @@ on:
 
 jobs:
  build_libebml:
- name: libebml with gcc13
+ name: libebml ${{ matrix.shared.name }} with gcc13
  runs-on: ubuntu-latest
+ strategy:
+ fail-fast: false
+ matrix:
+ shared: [
+ { "name": "Dynamic", "option": "ON"},
+ { "name": "Static", "option": "OFF"}
+ ]
  env:
  CMAKE_OPTIONS: -DCMAKE_CXX_EXTENSIONS=OFF -DBUILD_TESTING=ON
  steps:
@@ -17,8 +24,8 @@ jobs:
  - name: Get pushed code
  uses: actions/checkout@v3
 
- - name: Configure
- run: cmake -S . -B _build ${{ env.CMAKE_OPTIONS }} -DCMAKE_INSTALL_PREFIX:STRING=${GITHUB_WORKSPACE}/_built
+ - name: Configure ${{ matrix.shared.name }} library
+ run: cmake -S . -B _build ${{ env.CMAKE_OPTIONS }} -DBUILD_SHARED_LIBS=${{ matrix.shared.option }} -DCMAKE_INSTALL_PREFIX:STRING=${GITHUB_WORKSPACE}/_built
  env:
  CC: gcc-13
  CXX: g++-13