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- # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
- # file Copyright.txt or https://cmake.org/licensing for details.
- # This file sets the basic flags for the C++ language in CMake.
- # It also loads the available platform file for the system-compiler
- # if it exists.
- # It also loads a system - compiler - processor (or target hardware)
- # specific file, which is mainly useful for crosscompiling and embedded systems.
- include(CMakeLanguageInformation)
- # some compilers use different extensions (e.g. sdcc uses .rel)
- # so set the extension here first so it can be overridden by the compiler specific file
- if(UNIX)
- set(CMAKE_CXX_OUTPUT_EXTENSION .o)
- else()
- set(CMAKE_CXX_OUTPUT_EXTENSION .obj)
- endif()
- set(_INCLUDED_FILE 0)
- # Load compiler-specific information.
- if(CMAKE_CXX_COMPILER_ID)
- include(Compiler/${CMAKE_CXX_COMPILER_ID}-CXX OPTIONAL)
- endif()
- set(CMAKE_BASE_NAME)
- get_filename_component(CMAKE_BASE_NAME "${CMAKE_CXX_COMPILER}" NAME_WE)
- # since the gnu compiler has several names force g++
- if(CMAKE_COMPILER_IS_GNUCXX)
- set(CMAKE_BASE_NAME g++)
- endif()
- # load a hardware specific file, mostly useful for embedded compilers
- if(CMAKE_SYSTEM_PROCESSOR)
- if(CMAKE_CXX_COMPILER_ID)
- include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
- endif()
- if (NOT _INCLUDED_FILE)
- include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
- endif ()
- endif()
- # load the system- and compiler specific files
- if(CMAKE_CXX_COMPILER_ID)
- include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
- endif()
- if (NOT _INCLUDED_FILE)
- include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL
- RESULT_VARIABLE _INCLUDED_FILE)
- endif ()
- # load any compiler-wrapper specific information
- if (CMAKE_CXX_COMPILER_WRAPPER)
- __cmake_include_compiler_wrapper(CXX)
- endif ()
- # We specify the compiler information in the system file for some
- # platforms, but this language may not have been enabled when the file
- # was first included. Include it again to get the language info.
- # Remove this when all compiler info is removed from system files.
- if (NOT _INCLUDED_FILE)
- include(Platform/${CMAKE_SYSTEM_NAME} OPTIONAL)
- endif ()
- if(CMAKE_CXX_SIZEOF_DATA_PTR)
- foreach(f ${CMAKE_CXX_ABI_FILES})
- include(${f})
- endforeach()
- unset(CMAKE_CXX_ABI_FILES)
- endif()
- # This should be included before the _INIT variables are
- # used to initialize the cache. Since the rule variables
- # have if blocks on them, users can still define them here.
- # But, it should still be after the platform file so changes can
- # be made to those values.
- if(CMAKE_USER_MAKE_RULES_OVERRIDE)
- # Save the full path of the file so try_compile can use it.
- include(${CMAKE_USER_MAKE_RULES_OVERRIDE} RESULT_VARIABLE _override)
- set(CMAKE_USER_MAKE_RULES_OVERRIDE "${_override}")
- endif()
- if(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX)
- # Save the full path of the file so try_compile can use it.
- include(${CMAKE_USER_MAKE_RULES_OVERRIDE_CXX} RESULT_VARIABLE _override)
- set(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX "${_override}")
- endif()
- # Create a set of shared library variable specific to C++
- # For 90% of the systems, these are the same flags as the C versions
- # so if these are not set just copy the flags from the c version
- if(NOT CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS)
- set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
- endif()
- if(NOT CMAKE_CXX_COMPILE_OPTIONS_PIC)
- set(CMAKE_CXX_COMPILE_OPTIONS_PIC ${CMAKE_C_COMPILE_OPTIONS_PIC})
- endif()
- if(NOT CMAKE_CXX_COMPILE_OPTIONS_PIE)
- set(CMAKE_CXX_COMPILE_OPTIONS_PIE ${CMAKE_C_COMPILE_OPTIONS_PIE})
- endif()
- if(NOT CMAKE_CXX_LINK_OPTIONS_PIE)
- set(CMAKE_CXX_LINK_OPTIONS_PIE ${CMAKE_C_LINK_OPTIONS_PIE})
- endif()
- if(NOT CMAKE_CXX_LINK_OPTIONS_NO_PIE)
- set(CMAKE_CXX_LINK_OPTIONS_NO_PIE ${CMAKE_C_LINK_OPTIONS_NO_PIE})
- endif()
- if(NOT CMAKE_CXX_COMPILE_OPTIONS_DLL)
- set(CMAKE_CXX_COMPILE_OPTIONS_DLL ${CMAKE_C_COMPILE_OPTIONS_DLL})
- endif()
- if(NOT CMAKE_SHARED_LIBRARY_CXX_FLAGS)
- set(CMAKE_SHARED_LIBRARY_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
- endif()
- if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
- set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS})
- endif()
- if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG)
- set(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
- endif()
- if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP)
- set(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
- endif()
- if(NOT CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG)
- set(CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG})
- endif()
- if(NOT DEFINED CMAKE_EXE_EXPORTS_CXX_FLAG)
- set(CMAKE_EXE_EXPORTS_CXX_FLAG ${CMAKE_EXE_EXPORTS_C_FLAG})
- endif()
- if(NOT DEFINED CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG)
- set(CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_SONAME_C_FLAG})
- endif()
- if(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG)
- set(CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG})
- endif()
- if(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG_SEP)
- set(CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP})
- endif()
- if(NOT CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG)
- set(CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG})
- endif()
- if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_WITH_RUNTIME_PATH)
- set(CMAKE_SHARED_LIBRARY_LINK_CXX_WITH_RUNTIME_PATH ${CMAKE_SHARED_LIBRARY_LINK_C_WITH_RUNTIME_PATH})
- endif()
- if(NOT CMAKE_INCLUDE_FLAG_CXX)
- set(CMAKE_INCLUDE_FLAG_CXX ${CMAKE_INCLUDE_FLAG_C})
- endif()
- # for most systems a module is the same as a shared library
- # so unless the variable CMAKE_MODULE_EXISTS is set just
- # copy the values from the LIBRARY variables
- if(NOT CMAKE_MODULE_EXISTS)
- set(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
- set(CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS})
- endif()
- # repeat for modules
- if(NOT CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS)
- set(CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS ${CMAKE_SHARED_MODULE_CREATE_C_FLAGS})
- endif()
- if(NOT CMAKE_SHARED_MODULE_CXX_FLAGS)
- set(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_MODULE_C_FLAGS})
- endif()
- # Initialize CXX link type selection flags from C versions.
- foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
- if(NOT CMAKE_${type}_LINK_STATIC_CXX_FLAGS)
- set(CMAKE_${type}_LINK_STATIC_CXX_FLAGS
- ${CMAKE_${type}_LINK_STATIC_C_FLAGS})
- endif()
- if(NOT CMAKE_${type}_LINK_DYNAMIC_CXX_FLAGS)
- set(CMAKE_${type}_LINK_DYNAMIC_CXX_FLAGS
- ${CMAKE_${type}_LINK_DYNAMIC_C_FLAGS})
- endif()
- endforeach()
- # add the flags to the cache based
- # on the initial values computed in the platform/*.cmake files
- # use _INIT variables so that this only happens the first time
- # and you can set these flags in the cmake cache
- set(CMAKE_CXX_FLAGS_INIT "$ENV{CXXFLAGS} ${CMAKE_CXX_FLAGS_INIT}")
- cmake_initialize_per_config_variable(CMAKE_CXX_FLAGS "Flags used by the CXX compiler")
- if(CMAKE_CXX_STANDARD_LIBRARIES_INIT)
- set(CMAKE_CXX_STANDARD_LIBRARIES "${CMAKE_CXX_STANDARD_LIBRARIES_INIT}"
- CACHE STRING "Libraries linked by default with all C++ applications.")
- mark_as_advanced(CMAKE_CXX_STANDARD_LIBRARIES)
- endif()
- include(CMakeCommonLanguageInclude)
- # now define the following rules:
- # CMAKE_CXX_CREATE_SHARED_LIBRARY
- # CMAKE_CXX_CREATE_SHARED_MODULE
- # CMAKE_CXX_COMPILE_OBJECT
- # CMAKE_CXX_LINK_EXECUTABLE
- # variables supplied by the generator at use time
- # <TARGET>
- # <TARGET_BASE> the target without the suffix
- # <OBJECTS>
- # <OBJECT>
- # <LINK_LIBRARIES>
- # <FLAGS>
- # <LINK_FLAGS>
- # CXX compiler information
- # <CMAKE_CXX_COMPILER>
- # <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>
- # <CMAKE_CXX_SHARED_MODULE_CREATE_FLAGS>
- # <CMAKE_CXX_LINK_FLAGS>
- # Static library tools
- # <CMAKE_AR>
- # <CMAKE_RANLIB>
- # create a shared C++ library
- if(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
- set(CMAKE_CXX_CREATE_SHARED_LIBRARY
- "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
- endif()
- # create a c++ shared module copy the shared library rule by default
- if(NOT CMAKE_CXX_CREATE_SHARED_MODULE)
- set(CMAKE_CXX_CREATE_SHARED_MODULE ${CMAKE_CXX_CREATE_SHARED_LIBRARY})
- endif()
- # Create a static archive incrementally for large object file counts.
- # If CMAKE_CXX_CREATE_STATIC_LIBRARY is set it will override these.
- if(NOT DEFINED CMAKE_CXX_ARCHIVE_CREATE)
- set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> qc <TARGET> <LINK_FLAGS> <OBJECTS>")
- endif()
- if(NOT DEFINED CMAKE_CXX_ARCHIVE_APPEND)
- set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> q <TARGET> <LINK_FLAGS> <OBJECTS>")
- endif()
- if(NOT DEFINED CMAKE_CXX_ARCHIVE_FINISH)
- set(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
- endif()
- # compile a C++ file into an object file
- if(NOT CMAKE_CXX_COMPILE_OBJECT)
- set(CMAKE_CXX_COMPILE_OBJECT
- "<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -o <OBJECT> -c <SOURCE>")
- endif()
- if(NOT CMAKE_CXX_LINK_EXECUTABLE)
- set(CMAKE_CXX_LINK_EXECUTABLE
- "<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
- endif()
- mark_as_advanced(
- CMAKE_VERBOSE_MAKEFILE
- )
- set(CMAKE_CXX_INFORMATION_LOADED 1)
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