GitHub actions experiments (#8305)

Changes:
 - Build for Ubuntu-18.04 (gcc) and Ubuntu-20.04 (clang)
 - Build with libclang (Ubuntu 20.04)
 - Build with use_search enabled (Ubuntu 18.04)
 - Build with use_wizard enabled

2 files changed, 55 insertions, 19 deletions

diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index b697cad..555319e 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -12,27 +12,31 @@ jobs:
         config:
         - {
             name: "Ubuntu Latest GCC Release",
-            os: ubuntu-latest,
+            os: ubuntu-18.04,
             build_type: "Release", cc: "gcc", cxx: "g++",
-            build_gen: "Unix Makefiles"
+            build_gen: "Unix Makefiles",
+            cmake_extra_opts: "-Dbuild_search=YES -Dbuild_app=YES -Dbuild_parse=YES -Dbuild_xmlparser=YES"
           }
         - {
             name: "Ubuntu Latest GCC Debug",
-            os: ubuntu-latest,
+            os: ubuntu-18.04,
             build_type: "Debug", cc: "gcc", cxx: "g++",
-            build_gen: "Unix Makefiles"
+            build_gen: "Unix Makefiles",
+            cmake_extra_opts: "-Dbuild_search=YES -Dbuild_app=YES -Dbuild_parse=YES -Dbuild_xmlparser=YES"
           }
         - {
             name: "Ubuntu Latest Clang Release",
-            os: ubuntu-latest,
+            os: ubuntu-20.04,
             build_type: "Release", cc: "clang", cxx: "clang++",
-            build_gen: "Unix Makefiles"
+            build_gen: "Unix Makefiles",
+            cmake_extra_opts: "-Duse_libclang=YES -Dstatic_libclang=YES -Duse_libc++=NO"
           }
         - {
             name: "Ubuntu Latest Clang Debug",
-            os: ubuntu-latest,
+            os: ubuntu-20.04,
             build_type: "Debug", cc: "clang", cxx: "clang++",
-            build_gen: "Unix Makefiles"
+            build_gen: "Unix Makefiles",
+            cmake_extra_opts: "-Duse_libclang=YES -Dstatic_libclang=YES -Duse_libc++=NO"
           }
         - {
             name: "macOS Latest Release",
@@ -84,8 +88,8 @@ jobs:
       if: matrix.config.os == 'windows-latest'
 
     - name: Install LaTeX (Linux)
-      run: sudo apt-get install texlive texlive-generic-recommended texlive-extra-utils texlive-latex-extra texlive-font-utils
-      if: matrix.config.os == 'ubuntu-latest'
+      run: sudo apt-get install texlive texlive-latex-recommended texlive-extra-utils texlive-latex-extra texlive-font-utils
+      if: startsWith(matrix.config.os,'ubuntu-')
 
     - name: Install LaTeX (MacOS)
       run: |
@@ -93,6 +97,24 @@ jobs:
         echo "/Library/TeX/texbin/" >> $GITHUB_PATH
       if: matrix.config.os == 'macos-latest'
     
+    - name: Install libclang (Ubuntu 20.04)
+      run: |
+        sudo apt remove llvm-8 clang-8 libclang-common-8-dev clang-format-8 libllvm8
+        #sudo apt remove llvm-10 llvm-10-dev llvm-10-tools llvm-10-runtime clang-10 clang-format-10 libclang-common-10-dev libclang-cpp10 libclang1-10 libllvm10  
+        sudo apt-get autoremove
+        sudo apt-get clean
+        #sudo apt install libclang-9-dev libclang-common-9-dev
+        sudo apt install libclang-10-dev libclang-common-10-dev
+        apt list --installed | egrep '(clang|llvm)'
+        ls -d /usr/lib/llvm-*/include/
+        clang++ -v
+      if: matrix.config.os == 'ubuntu-20.04'
+    
+    - name: Install libxapian (Ubuntu 18.04)
+      run: |
+        sudo apt install libxapian-dev
+      if: matrix.config.os == 'ubuntu-18.04'
+          
     - name: Extract MikTex zip (Windows)
       shell: bash
       run: |
@@ -130,7 +152,7 @@ jobs:
 
     - name: Install Ghostscript (Linux)
       run: sudo apt-get install ghostscript
-      if: matrix.config.os == 'ubuntu-latest'
+      if: startsWith(matrix.config.os,'ubuntu-')
     
     - name: Install Ghostscript (Windows)
       run:
@@ -148,7 +170,7 @@ jobs:
       
     - name: Install xmllint (Linux)
       run: sudo apt-get install libxml2-utils
-      if: matrix.config.os == 'ubuntu-latest'
+      if: startsWith(matrix.config.os,'ubuntu-')
 
     - name: Install xmllint (MacOS)
       run: brew install libxml2
@@ -167,7 +189,7 @@ jobs:
 
     - name: Install Graphviz (Linux)
       run: sudo apt-get install graphviz
-      if: matrix.config.os == 'ubuntu-latest'
+      if: startsWith(matrix.config.os,'ubuntu-')
 
     - name: Install Graphviz (MacOS)
       run: brew install graphviz
@@ -192,6 +214,9 @@ jobs:
         refreshenv
       if: matrix.config.os == 'windows-latest'
     
+    - name: Install Qt
+      uses: jurplel/install-qt-action@v2
+    
     - name: Check tool versions (Linux / MacOS)
       shell: bash
       run: |
@@ -255,9 +280,8 @@ jobs:
             -D CMAKE_BUILD_TYPE=${{ matrix.config.build_type }}
             -G "${{ matrix.config.build_gen }}"
             -Dbuild_doc=YES
-            -Dbuild_app=YES
-            -Dbuild_parse=YES
-            -Dbuild_xmlparser=YES            
+            -Dbuild_wizard=YES
+            ${{ matrix.config.cmake_extra_opts }}            
           RESULT_VARIABLE result
         )
         if (NOT result EQUAL 0)
diff --git a/addon/doxyapp/CMakeLists.txt b/addon/doxyapp/CMakeLists.txt
index 3e58d32..707fded 100644
--- a/addon/doxyapp/CMakeLists.txt
+++ b/addon/doxyapp/CMakeLists.txt
@@ -15,11 +15,23 @@ doxyapp.cpp
 add_sanitizers(doxyapp)
 
 if (use_libclang)
+    find_package(LLVM REQUIRED CONFIG)
+    find_package(Clang REQUIRED CONFIG)
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+        target_compile_features(doxyapp PRIVATE cxx_alignof)
+        if (use_libc++)
+            target_compile_options(doxyapp PRIVATE -stdlib=libc++)
+        endif()
+    endif()
+    include_directories(${LLVM_INCLUDE_DIRS})
+    add_definitions(${LLVM_DEFINITIONS})
     if (static_libclang)
-        set(CLANG_LIBS libclang clangTooling ${llvm_libs})
-    else()
-        set(CLANG_LIBS libclang clang-cpp ${llvm_libs})
+        set(CLANG_LIBS libclang clangTooling)
+    else() # dynamically linked version of clang
+        llvm_config(doxymain USE_SHARED support)
+        set(CLANG_LIBS libclang clang-cpp)
     endif()
+    target_compile_definitions(doxyapp PRIVATE ${LLVM_DEFINITIONS})
 endif()
 
 target_link_libraries(doxyapp