Add c++20 support flag to cmake

CMakeLists.txt

@@ -7,13 +7,19 @@ project(Serene
   LANGUAGES CXX C)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
+option(CPP_20_SUPPORT "C++20 Support" OFF)
 
 # Only do these if this is the main project, and not if it is included through add_subdirectory
 if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
 
   ## Settings -----------------------------------------
   # specify the C++ standard
-  set(CMAKE_CXX_STANDARD 14)
+  if (CPP_20_SUPPORT)
+    set(CMAKE_CXX_STANDARD 20)
+  else()
+    set(CMAKE_CXX_STANDARD 14)
+  endif()
+
   set(CMAKE_CXX_STANDARD_REQUIRED True)
 
   set(INCLUDE_DIR ${CMAKE_SOURCE_DIR}/include)

bin/CMakeLists.txt

@@ -2,7 +2,14 @@ add_executable(serenec serene.cpp)
 # Make sure to generate files related to the dialects first
 add_dependencies(serenec SereneDialectGen)
 
-target_compile_features(serenec PRIVATE cxx_std_14)
+if (CPP_20_SUPPORT)
+  target_compile_features(serenec PRIVATE cxx_std_20)
+else()
+  target_compile_features(serenec PRIVATE cxx_std_14)
+endif()
+
+
+
 
 target_link_libraries(serenec PRIVATE
   serene

builder

@@ -34,6 +34,13 @@ function build() {
     popd_build
 }
 
+function build-20() {
+    pushed_build
+    cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCPP_20_SUPPORT=ON "$@" $ROOT_DIR
+    ninja -j `nproc`
+    popd_build
+}
+
 function build-release() {
     pushed_build
     cmake -G Ninja -DCMAKE_BUILD_TYPE=Release $ROOT_DIR
@@ -93,6 +100,12 @@ case "$command" in
         mkdir -p $BUILD_DIR
         build "${@:2}"
         ;;
+    "build-20")
+        clean
+        mkdir -p $BUILD_DIR
+        build-20 "${@:2}"
+        ;;
+
     "build-docs")
         clean
         mkdir -p $BUILD_DIR

src/CMakeLists.txt

@@ -54,8 +54,15 @@ add_library(serene
 # Make sure to generate files related to the dialects first
 add_dependencies(serene SereneDialectGen)
 
+
+if (CPP_20_SUPPORT)
+  target_compile_features(serene PUBLIC cxx_std_20)
+else()
+  target_compile_features(serene PUBLIC cxx_std_14)
+endif()
+
+
 # We need this directory, and users of our library will need it too
-target_compile_features(serene PUBLIC cxx_std_14)
 target_include_directories(serene PRIVATE ${INCLUDE_DIR})
 target_include_directories(serene PUBLIC ${PROJECT_BINARY_DIR})