Set CMake C++ standard flag in PARENT_SCOPE

Author: saki7

.github/workflows/ci.yml

@@ -173,7 +173,7 @@ jobs:
 
       - name: Build Tests
         run: |
-          cmake --build build --config ${{ matrix.build_type.name }} -j${{ env.IRIS_BUILD_JOBS }} ${{ matrix.compiler.builder_additional_args }}
+          cmake --build build --verbose --config ${{ matrix.build_type.name }} -j${{ env.IRIS_BUILD_JOBS }} ${{ matrix.compiler.builder_additional_args }}
 
       - name: Cache CMake Dependencies (save)
         if: steps.cache-deps.outputs.cache-hit != 'true'

CMakeLists.txt

@@ -77,6 +77,10 @@ if(MSVC)
     if(CMAKE_CXX_STANDARD EQUAL ${IRIS_CXX_VERSION_BEFORE_LATEST})
         set(CMAKE_CXX${IRIS_CXX_VERSION_BEFORE_LATEST}_STANDARD_COMPILE_OPTION /std:c++${IRIS_CXX_VERSION_BEFORE_LATEST}preview)
         set(CMAKE_CXX${IRIS_CXX_VERSION_BEFORE_LATEST}_EXTENSION_COMPILE_OPTION /std:c++${IRIS_CXX_VERSION_BEFORE_LATEST}preview)
+
+        set(CMAKE_CXX${IRIS_CXX_VERSION_BEFORE_LATEST}_STANDARD_COMPILE_OPTION ${CMAKE_CXX${IRIS_CXX_VERSION_BEFORE_LATEST}_STANDARD_COMPILE_OPTION} PARENT_SCOPE)
+        set(CMAKE_CXX${IRIS_CXX_VERSION_BEFORE_LATEST}_EXTENSION_COMPILE_OPTION ${CMAKE_CXX${IRIS_CXX_VERSION_BEFORE_LATEST}_EXTENSION_COMPILE_OPTION} PARENT_SCOPE)
+
         target_compile_options(_iris_cxx_common INTERFACE /std:c++${IRIS_CXX_VERSION_BEFORE_LATEST}preview)
 
     else()