Testing build of doxygen documentation in github actions.

Author: arobenko

.github/workflows/actions_build.yml

@@ -220,7 +220,7 @@ jobs:
     - name: Install Packages
       run: |
         sudo apt install libqt${{matrix.qt_ver}}gui${{matrix.qt_ver}} qtbase5-dev qt6-base-dev libboost-all-dev libxml2-dev gcc-${{matrix.cc_ver}} g++-${{matrix.cc_ver}} \
-        python3 libpython3-dev swig default-jdk default-jre emscripten
+        python3 libpython3-dev swig default-jdk default-jre emscripten doxygen
 
     - name: Create Build Environment
       run: cmake -E make_directory ${{runner.workspace}}/build      
@@ -249,7 +249,7 @@ jobs:
         -DCMAKE_PREFIX_PATH=${{runner.workspace}}/build/install -DCMAKE_CXX_STANDARD=${{matrix.cpp}} \
         -DDEMO3_TOOLS_QT_VER=${{matrix.qt_ver}} \
         -DDEMO3_GEN_PROTOCOL=ON -DDEMO3_GEN_TEST=ON -DDEMO3_GEN_TOOLS=ON -DDEMO3_BUILD_TOOLS=${{env.BUILD_TOOLS}} \
-        -DDEMO3_GEN_SWIG=ON -DDEMO3_GEN_EMSCRIPTEN=ON
+        -DDEMO3_GEN_SWIG=ON -DDEMO3_GEN_EMSCRIPTEN=ON -DDEMO3_BUILD_PROT_DOC=ON
       env:
         CC: gcc-${{matrix.cc_ver}}
         CXX: g++-${{matrix.cc_ver}}