mirror of
https://github.com/reactos/CMake.git
synced 2024-11-28 14:01:21 +00:00
8b4873a1b0
When a user or a compiler wrapper adds '-static' to the compiler flags then it will always link static binaries. Detect this from the compiler id binary and disable TARGET_SUPPORTS_SHARED_LIBS. This will prevent projects from accidentally adding shared libraries when the toolchain does not support them. It also helps CMake avoid linking with flags that require shared libraries to be supported.
303 lines
10 KiB
CMake
303 lines
10 KiB
CMake
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#=============================================================================
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# Copyright 2004-2011 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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# This file sets the basic flags for the C++ language in CMake.
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# It also loads the available platform file for the system-compiler
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# if it exists.
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# It also loads a system - compiler - processor (or target hardware)
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# specific file, which is mainly useful for crosscompiling and embedded systems.
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# some compilers use different extensions (e.g. sdcc uses .rel)
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# so set the extension here first so it can be overridden by the compiler specific file
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if(UNIX)
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set(CMAKE_CXX_OUTPUT_EXTENSION .o)
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else()
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set(CMAKE_CXX_OUTPUT_EXTENSION .obj)
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endif()
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set(_INCLUDED_FILE 0)
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# Load compiler-specific information.
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if(CMAKE_CXX_COMPILER_ID)
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include(Compiler/${CMAKE_CXX_COMPILER_ID}-CXX OPTIONAL)
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endif()
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set(CMAKE_BASE_NAME)
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get_filename_component(CMAKE_BASE_NAME "${CMAKE_CXX_COMPILER}" NAME_WE)
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# since the gnu compiler has several names force g++
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if(CMAKE_COMPILER_IS_GNUCXX)
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set(CMAKE_BASE_NAME g++)
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endif()
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# load a hardware specific file, mostly useful for embedded compilers
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if(CMAKE_SYSTEM_PROCESSOR)
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if(CMAKE_CXX_COMPILER_ID)
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include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
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endif()
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if (NOT _INCLUDED_FILE)
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include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
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endif ()
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endif()
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# load the system- and compiler specific files
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if(CMAKE_CXX_COMPILER_ID)
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include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
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endif()
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if (NOT _INCLUDED_FILE)
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include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL
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RESULT_VARIABLE _INCLUDED_FILE)
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endif ()
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# We specify the compiler information in the system file for some
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# platforms, but this language may not have been enabled when the file
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# was first included. Include it again to get the language info.
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# Remove this when all compiler info is removed from system files.
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if (NOT _INCLUDED_FILE)
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include(Platform/${CMAKE_SYSTEM_NAME} OPTIONAL)
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endif ()
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if(CMAKE_CXX_SIZEOF_DATA_PTR)
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foreach(f ${CMAKE_CXX_ABI_FILES})
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include(${f})
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endforeach()
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unset(CMAKE_CXX_ABI_FILES)
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endif()
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if(CMAKE_CXX_COMPILER_LINKS_STATICALLY)
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set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
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endif()
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# This should be included before the _INIT variables are
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# used to initialize the cache. Since the rule variables
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# have if blocks on them, users can still define them here.
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# But, it should still be after the platform file so changes can
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# be made to those values.
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if(CMAKE_USER_MAKE_RULES_OVERRIDE)
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# Save the full path of the file so try_compile can use it.
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include(${CMAKE_USER_MAKE_RULES_OVERRIDE} RESULT_VARIABLE _override)
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set(CMAKE_USER_MAKE_RULES_OVERRIDE "${_override}")
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endif()
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if(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX)
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# Save the full path of the file so try_compile can use it.
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include(${CMAKE_USER_MAKE_RULES_OVERRIDE_CXX} RESULT_VARIABLE _override)
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set(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX "${_override}")
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endif()
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# Create a set of shared library variable specific to C++
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# For 90% of the systems, these are the same flags as the C versions
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# so if these are not set just copy the flags from the c version
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if(NOT CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS)
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set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
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endif()
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if(NOT CMAKE_CXX_COMPILE_OPTIONS_PIC)
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set(CMAKE_CXX_COMPILE_OPTIONS_PIC ${CMAKE_C_COMPILE_OPTIONS_PIC})
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endif()
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if(NOT CMAKE_CXX_COMPILE_OPTIONS_PIE)
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set(CMAKE_CXX_COMPILE_OPTIONS_PIE ${CMAKE_C_COMPILE_OPTIONS_PIE})
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endif()
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if(NOT CMAKE_CXX_COMPILE_OPTIONS_DLL)
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set(CMAKE_CXX_COMPILE_OPTIONS_DLL ${CMAKE_C_COMPILE_OPTIONS_DLL})
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endif()
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if(NOT CMAKE_SHARED_LIBRARY_CXX_FLAGS)
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set(CMAKE_SHARED_LIBRARY_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
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endif()
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if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
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set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS})
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endif()
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if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG)
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set(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
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endif()
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if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP)
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set(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
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endif()
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if(NOT CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG)
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set(CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG})
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endif()
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if(NOT DEFINED CMAKE_EXE_EXPORTS_CXX_FLAG)
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set(CMAKE_EXE_EXPORTS_CXX_FLAG ${CMAKE_EXE_EXPORTS_C_FLAG})
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endif()
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if(NOT DEFINED CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG)
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set(CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_SONAME_C_FLAG})
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endif()
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if(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG)
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set(CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG})
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endif()
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if(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG_SEP)
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set(CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP})
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endif()
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if(NOT CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG)
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set(CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG})
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endif()
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if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_WITH_RUNTIME_PATH)
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set(CMAKE_SHARED_LIBRARY_LINK_CXX_WITH_RUNTIME_PATH ${CMAKE_SHARED_LIBRARY_LINK_C_WITH_RUNTIME_PATH})
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endif()
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if(NOT CMAKE_INCLUDE_FLAG_CXX)
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set(CMAKE_INCLUDE_FLAG_CXX ${CMAKE_INCLUDE_FLAG_C})
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endif()
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if(NOT CMAKE_INCLUDE_FLAG_SEP_CXX)
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set(CMAKE_INCLUDE_FLAG_SEP_CXX ${CMAKE_INCLUDE_FLAG_SEP_C})
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endif()
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# for most systems a module is the same as a shared library
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# so unless the variable CMAKE_MODULE_EXISTS is set just
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# copy the values from the LIBRARY variables
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if(NOT CMAKE_MODULE_EXISTS)
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set(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
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set(CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS})
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endif()
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# repeat for modules
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if(NOT CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS)
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set(CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS ${CMAKE_SHARED_MODULE_CREATE_C_FLAGS})
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endif()
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if(NOT CMAKE_SHARED_MODULE_CXX_FLAGS)
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set(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_MODULE_C_FLAGS})
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endif()
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# Initialize CXX link type selection flags from C versions.
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foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
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if(NOT CMAKE_${type}_LINK_STATIC_CXX_FLAGS)
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set(CMAKE_${type}_LINK_STATIC_CXX_FLAGS
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${CMAKE_${type}_LINK_STATIC_C_FLAGS})
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endif()
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if(NOT CMAKE_${type}_LINK_DYNAMIC_CXX_FLAGS)
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set(CMAKE_${type}_LINK_DYNAMIC_CXX_FLAGS
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${CMAKE_${type}_LINK_DYNAMIC_C_FLAGS})
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endif()
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endforeach()
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# add the flags to the cache based
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# on the initial values computed in the platform/*.cmake files
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# use _INIT variables so that this only happens the first time
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# and you can set these flags in the cmake cache
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set(CMAKE_CXX_FLAGS_INIT "$ENV{CXXFLAGS} ${CMAKE_CXX_FLAGS_INIT}")
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# avoid just having a space as the initial value for the cache
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if(CMAKE_CXX_FLAGS_INIT STREQUAL " ")
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set(CMAKE_CXX_FLAGS_INIT)
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endif()
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set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS_INIT}" CACHE STRING
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"Flags used by the compiler during all build types.")
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if(NOT CMAKE_NOT_USING_CONFIG_FLAGS)
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set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG_INIT}" CACHE STRING
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"Flags used by the compiler during debug builds.")
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set (CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL_INIT}" CACHE STRING
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"Flags used by the compiler during release builds for minimum size.")
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set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE_INIT}" CACHE STRING
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"Flags used by the compiler during release builds.")
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set (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT}" CACHE STRING
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"Flags used by the compiler during release builds with debug info.")
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endif()
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if(CMAKE_CXX_STANDARD_LIBRARIES_INIT)
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set(CMAKE_CXX_STANDARD_LIBRARIES "${CMAKE_CXX_STANDARD_LIBRARIES_INIT}"
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CACHE STRING "Libraries linked by default with all C++ applications.")
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mark_as_advanced(CMAKE_CXX_STANDARD_LIBRARIES)
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endif()
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include(CMakeCommonLanguageInclude)
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# now define the following rules:
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# CMAKE_CXX_CREATE_SHARED_LIBRARY
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# CMAKE_CXX_CREATE_SHARED_MODULE
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# CMAKE_CXX_COMPILE_OBJECT
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# CMAKE_CXX_LINK_EXECUTABLE
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# variables supplied by the generator at use time
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# <TARGET>
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# <TARGET_BASE> the target without the suffix
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# <OBJECTS>
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# <OBJECT>
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# <LINK_LIBRARIES>
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# <FLAGS>
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# <LINK_FLAGS>
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# CXX compiler information
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# <CMAKE_CXX_COMPILER>
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# <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>
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# <CMAKE_CXX_SHARED_MODULE_CREATE_FLAGS>
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# <CMAKE_CXX_LINK_FLAGS>
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# Static library tools
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# <CMAKE_AR>
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# <CMAKE_RANLIB>
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# create a shared C++ library
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if(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
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set(CMAKE_CXX_CREATE_SHARED_LIBRARY
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"<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>")
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endif()
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# create a c++ shared module copy the shared library rule by default
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if(NOT CMAKE_CXX_CREATE_SHARED_MODULE)
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set(CMAKE_CXX_CREATE_SHARED_MODULE ${CMAKE_CXX_CREATE_SHARED_LIBRARY})
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endif()
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# Create a static archive incrementally for large object file counts.
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# If CMAKE_CXX_CREATE_STATIC_LIBRARY is set it will override these.
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if(NOT DEFINED CMAKE_CXX_ARCHIVE_CREATE)
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set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> qc <TARGET> <LINK_FLAGS> <OBJECTS>")
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endif()
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if(NOT DEFINED CMAKE_CXX_ARCHIVE_APPEND)
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set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> q <TARGET> <LINK_FLAGS> <OBJECTS>")
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endif()
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if(NOT DEFINED CMAKE_CXX_ARCHIVE_FINISH)
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set(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
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endif()
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# compile a C++ file into an object file
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if(NOT CMAKE_CXX_COMPILE_OBJECT)
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set(CMAKE_CXX_COMPILE_OBJECT
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"<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -o <OBJECT> -c <SOURCE>")
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endif()
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if(NOT CMAKE_CXX_LINK_EXECUTABLE)
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set(CMAKE_CXX_LINK_EXECUTABLE
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"<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
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endif()
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mark_as_advanced(
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CMAKE_VERBOSE_MAKEFILE
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CMAKE_CXX_FLAGS
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CMAKE_CXX_FLAGS_RELEASE
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CMAKE_CXX_FLAGS_RELWITHDEBINFO
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CMAKE_CXX_FLAGS_MINSIZEREL
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CMAKE_CXX_FLAGS_DEBUG)
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set(CMAKE_CXX_INFORMATION_LOADED 1)
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