changed name for standard, default is 20, added multiple cxx to pipeline

Author: StephanKa

.github/workflows/build_cmake.yml

@@ -13,7 +13,7 @@ env:
 
 jobs:
   build:
-    name: ${{ matrix.os }}, ${{ matrix.compiler.name }}
+    name: ${{ matrix.os }}, ${{ matrix.compiler.name }}, C++${{ matrix.cxx }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false  # 'false' means Don't stop matrix workflows even if some matrix entry fails.
@@ -26,6 +26,7 @@ jobs:
                     {name: 'Clang 14', cpp: clang++-14, c: clang-14, pkgs: 'clang-14 llvm-14'},
                     {name: 'Clang 15', cpp: clang++-15, c: clang-15, pkgs: 'clang-15 llvm-15'}
                   ]
+        cxx: [14, 17, 20]
 
     steps:
     - uses: actions/checkout@v3
@@ -73,7 +74,7 @@ jobs:
       # We need to source the profile file to make sure conan is in PATH
       run: |
         source ~/.profile
-        cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCPP_STARTER_USE_SML=ON -DCPP_STARTER_USE_BOOST_BEAST=ON -DCPP_STARTER_USE_CROW=ON -DCPP_STARTER_USE_CPPZMQ_PROTO=ON
+        cmake $GITHUB_WORKSPACE -DCXX_STANDARD=${{ matrix.cxx }} -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCPP_STARTER_USE_SML=ON -DCPP_STARTER_USE_BOOST_BEAST=ON -DCPP_STARTER_USE_CROW=ON -DCPP_STARTER_USE_CPPZMQ_PROTO=ON
 
     - name: Build
       working-directory: ${{runner.workspace}}/build

CMakeLists.txt

@@ -5,7 +5,9 @@ PROJECT(myproject
         LANGUAGES CXX
         VERSION 0.0.1)
 
-SET(CMAKE_CXX_STANDARD 20)
+if(NOT DEFINED CXX_STANDARD)
+    set(CXX_STANDARD 20)
+endif()
 
 INCLUDE(cmake/StandardProjectSettings.cmake)
 INCLUDE(cmake/PreventInSourceBuilds.cmake)
@@ -22,7 +24,7 @@ CONFIGURE_FILE("templates/version.hpp.in" "${CMAKE_BINARY_DIR}/generated/include
 
 # Link this 'library' to set the c++ standard / compile-time options requested
 ADD_LIBRARY(project_options INTERFACE)
-TARGET_COMPILE_FEATURES(project_options INTERFACE cxx_std_${CMAKE_CXX_STANDARD})
+TARGET_COMPILE_FEATURES(project_options INTERFACE cxx_std_${CXX_STANDARD})
 
 IF(CMAKE_CXX_COMPILER_ID MATCHES ".*Clang")
     OPTION(ENABLE_BUILD_WITH_TIME_TRACE "Enable -ftime-trace to generate time tracing .json files on clang" OFF)

cmake/Conan.cmake

@@ -25,7 +25,7 @@ macro(run_conan)
     ${CONAN_EXTRA_OPTIONS}
     gtest:build_gmock=True
     SETTINGS
-    compiler.cppstd=${CMAKE_CXX_STANDARD}
+    compiler.cppstd=${CXX_STANDARD}
     BASIC_SETUP
     CMAKE_TARGETS # individual targets to link to
     BUILD