diff options
Diffstat (limited to 'Modules/CMakeCXXInformation.cmake')
| -rw-r--r-- | Modules/CMakeCXXInformation.cmake | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/Modules/CMakeCXXInformation.cmake b/Modules/CMakeCXXInformation.cmake new file mode 100644 index 0000000..53abf37 --- /dev/null +++ b/Modules/CMakeCXXInformation.cmake @@ -0,0 +1,296 @@ +# 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() + +if(CMAKE_EXECUTABLE_FORMAT STREQUAL "ELF") + if(NOT DEFINED CMAKE_CXX_LINK_WHAT_YOU_USE_FLAG) + set(CMAKE_CXX_LINK_WHAT_YOU_USE_FLAG "LINKER:--no-as-needed") + endif() + if(NOT DEFINED CMAKE_LINK_WHAT_YOU_USE_CHECK) + set(CMAKE_LINK_WHAT_YOU_USE_CHECK ldd -u -r) + endif() +endif() + +# 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() + +if(NOT CMAKE_CXX_COMPILER_LAUNCHER AND DEFINED ENV{CMAKE_CXX_COMPILER_LAUNCHER}) + set(CMAKE_CXX_COMPILER_LAUNCHER "$ENV{CMAKE_CXX_COMPILER_LAUNCHER}" + CACHE STRING "Compiler launcher for CXX.") +endif() + +if(NOT CMAKE_CXX_LINKER_LAUNCHER AND DEFINED ENV{CMAKE_CXX_LINKER_LAUNCHER}) + set(CMAKE_CXX_LINKER_LAUNCHER "$ENV{CMAKE_CXX_LINKER_LAUNCHER}" + CACHE STRING "Linker launcher for CXX.") +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) |