Set C++ Standard the CMake way.

Author: Kraust

modules/openapi-generator/src/main/resources/cpp-oatpp-server/cmake.mustache

@@ -2,8 +2,6 @@ cmake_minimum_required (VERSION 3.2)
 
 project(api-server)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -pg -g3" )
-
 {{#addExternalLibs}}
 include(ExternalProject)
 
@@ -29,5 +27,7 @@ file(GLOB SRCS
 )
 
 add_executable(${PROJECT_NAME} ${SRCS})
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
+
 {{#addExternalLibs}}add_dependencies(${PROJECT_NAME} OATPP)
 target_link_libraries(${PROJECT_NAME} ${EXTERNAL_INSTALL_LOCATION}/lib/oatpp-1.3.0/liboatpp.a){{/addExternalLibs}}

samples/server/petstore/cpp-oatpp/CMakeLists.txt

@@ -2,8 +2,6 @@ cmake_minimum_required (VERSION 3.2)
 
 project(api-server)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -pg -g3" )
-
 include(ExternalProject)
 
 set(EXTERNAL_INSTALL_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/external)
@@ -27,5 +25,7 @@ file(GLOB SRCS
 )
 
 add_executable(${PROJECT_NAME} ${SRCS})
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
+
 add_dependencies(${PROJECT_NAME} OATPP)
 target_link_libraries(${PROJECT_NAME} ${EXTERNAL_INSTALL_LOCATION}/lib/oatpp-1.3.0/liboatpp.a)