-IF(NOT NO_CXX11_SUPPORT)
- # C++11 support
- CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
- CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
- IF(COMPILER_SUPPORTS_CXX11)
- MESSAGE(STATUS "Enable C++11 support")
- SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
- ELSEIF(COMPILER_SUPPORTS_CXX0X)
- MESSAGE(STATUS "Enable C++0x support")
- SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
- ELSE()
- MESSAGE(WARNING "Compiler ${CMAKE_CXX_COMPILER} has no C++11 support.")
+# Option: C++ standard to use
+# Note: CMake by default enables C++ extensions; they can be disabled by additionally
+# specifying -DCMAKE_CXX_EXTENSIONS=OFF
+SET(SALOME_CXX_STANDARD 14 CACHE STRING "C++ standard to use")
+SET(_supported_standards 11 14 17 20)
+SET(_standard_ok FALSE)
+FOREACH(_standard ${_supported_standards})
+ IF(SALOME_CXX_STANDARD STREQUAL _standard)
+ SET(_standard_ok TRUE)
+ BREAK()
+ ENDIF()
+ENDFOREACH()
+IF(NOT _standard_ok)
+ MESSAGE(FATAL_ERROR "Unsupported C++ standard: ${SALOME_CXX_STANDARD}; allowed values: ${_supported_standards}")
+ENDIF()
+UNSET(_supported_standards)
+UNSET(_standard)
+UNSET(_standard_ok)
+MESSAGE(STATUS "Setting C++ standard to ${SALOME_CXX_STANDARD}")
+SET(CMAKE_CXX_STANDARD ${SALOME_CXX_STANDARD})
+SET(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Fight warnings
+IF(NOT APPLE)
+ OPTION(SALOME_DEBUG_WARNINGS "Report more warnings" OFF)
+ OPTION(SALOME_TREAT_WARNINGS_AS_ERRORS "Treat warnings as errors" OFF)
+ # Report more warnings
+ MARK_AS_ADVANCED(SALOME_DEBUG_WARNINGS SALOME_TREAT_WARNINGS_AS_ERRORS)
+ IF(SALOME_DEBUG_WARNINGS)
+ IF(WIN32)
+ SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W4")
+ SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+ ELSE()
+ SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wpedantic")
+ SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wpedantic")
+ ENDIF()
+ ENDIF()
+ ## Treat all warnings as errors
+ IF(SALOME_TREAT_WARNINGS_AS_ERRORS)
+ IF(WIN32)
+ SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /WX")
+ SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /WX")
+ ELSE()
+ SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")
+ SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
+ ENDIF()