1 # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
2 # file Copyright.txt or https://cmake.org/licensing for details.
5 # This file sets the basic flags for the Objective-C++ language in CMake.
6 # It also loads the available platform file for the system-compiler
8 # It also loads a system - compiler - processor (or target hardware)
9 # specific file, which is mainly useful for crosscompiling and embedded systems.
11 include(CMakeLanguageInformation)
13 # some compilers use different extensions (e.g. sdcc uses .rel)
14 # so set the extension here first so it can be overridden by the compiler specific file
15 set(CMAKE_OBJCXX_OUTPUT_EXTENSION .o)
19 # Load compiler-specific information.
20 if(CMAKE_OBJCXX_COMPILER_ID)
21 include(Compiler/${CMAKE_OBJCXX_COMPILER_ID}-OBJCXX OPTIONAL)
25 get_filename_component(CMAKE_BASE_NAME "${CMAKE_OBJCXX_COMPILER}" NAME_WE)
26 # since the gnu compiler has several names force g++
27 if(CMAKE_COMPILER_IS_GNUOBJCXX)
28 set(CMAKE_BASE_NAME g++)
32 # load a hardware specific file, mostly useful for embedded compilers
33 if(CMAKE_SYSTEM_PROCESSOR)
34 if(CMAKE_OBJCXX_COMPILER_ID)
35 include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_OBJCXX_COMPILER_ID}-OBJCXX-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
37 if (NOT _INCLUDED_FILE)
38 include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
42 # load the system- and compiler specific files
43 if(CMAKE_OBJCXX_COMPILER_ID)
44 include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_OBJCXX_COMPILER_ID}-OBJCXX OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
46 if (NOT _INCLUDED_FILE)
47 include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL
48 RESULT_VARIABLE _INCLUDED_FILE)
51 # load any compiler-wrapper specific information
52 if (CMAKE_OBJCXX_COMPILER_WRAPPER)
53 __cmake_include_compiler_wrapper(OBJCXX)
56 # We specify the compiler information in the system file for some
57 # platforms, but this language may not have been enabled when the file
58 # was first included. Include it again to get the language info.
59 # Remove this when all compiler info is removed from system files.
60 if (NOT _INCLUDED_FILE)
61 include(Platform/${CMAKE_SYSTEM_NAME} OPTIONAL)
64 if(CMAKE_OBJCXX_SIZEOF_DATA_PTR)
65 foreach(f IN LISTS CMAKE_OBJCXX_ABI_FILES)
68 unset(CMAKE_OBJCXX_ABI_FILES)
71 # This should be included before the _INIT variables are
72 # used to initialize the cache. Since the rule variables
73 # have if blocks on them, users can still define them here.
74 # But, it should still be after the platform file so changes can
75 # be made to those values.
77 if(CMAKE_USER_MAKE_RULES_OVERRIDE)
78 # Save the full path of the file so try_compile can use it.
79 include(${CMAKE_USER_MAKE_RULES_OVERRIDE} RESULT_VARIABLE _override)
80 set(CMAKE_USER_MAKE_RULES_OVERRIDE "${_override}")
83 if(CMAKE_USER_MAKE_RULES_OVERRIDE_OBJCXX)
84 # Save the full path of the file so try_compile can use it.
85 include(${CMAKE_USER_MAKE_RULES_OVERRIDE_OBJCXX} RESULT_VARIABLE _override)
86 set(CMAKE_USER_MAKE_RULES_OVERRIDE_OBJCXX "${_override}")
90 # Create a set of shared library variable specific to Objective-C++
91 # For 90% of the systems, these are the same flags as the Objective-C versions
92 # so if these are not set just copy the flags from the Objective-C version
93 if(NOT CMAKE_SHARED_LIBRARY_CREATE_OBJCXX_FLAGS)
94 set(CMAKE_SHARED_LIBRARY_CREATE_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_OBJC_FLAGS})
97 if(NOT CMAKE_OBJCXX_COMPILE_OPTIONS_PIC)
98 set(CMAKE_OBJCXX_COMPILE_OPTIONS_PIC ${CMAKE_OBJC_COMPILE_OPTIONS_PIC})
101 if(NOT CMAKE_OBJCXX_COMPILE_OPTIONS_PIE)
102 set(CMAKE_OBJCXX_COMPILE_OPTIONS_PIE ${CMAKE_OBJC_COMPILE_OPTIONS_PIE})
104 if(NOT CMAKE_OBJCXX_LINK_OPTIONS_PIE)
105 set(CMAKE_OBJCXX_LINK_OPTIONS_PIE ${CMAKE_OBJC_LINK_OPTIONS_PIE})
107 if(NOT CMAKE_OBJCXX_LINK_OPTIONS_NO_PIE)
108 set(CMAKE_OBJCXX_LINK_OPTIONS_NO_PIE ${CMAKE_OBJC_LINK_OPTIONS_NO_PIE})
111 if(NOT CMAKE_OBJCXX_COMPILE_OPTIONS_DLL)
112 set(CMAKE_OBJCXX_COMPILE_OPTIONS_DLL ${CMAKE_OBJC_COMPILE_OPTIONS_DLL})
115 if(NOT CMAKE_SHARED_LIBRARY_OBJCXX_FLAGS)
116 set(CMAKE_SHARED_LIBRARY_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_OBJC_FLAGS})
119 if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_OBJCXX_FLAGS)
120 set(CMAKE_SHARED_LIBRARY_LINK_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_OBJC_FLAGS})
123 if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG)
124 set(CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJC_FLAG})
127 if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG_SEP)
128 set(CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJC_FLAG_SEP})
131 if(NOT CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJCXX_FLAG)
132 set(CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJC_FLAG})
135 if(NOT DEFINED CMAKE_EXE_EXPORTS_OBJCXX_FLAG)
136 set(CMAKE_EXE_EXPORTS_OBJCXX_FLAG ${CMAKE_EXE_EXPORTS_OBJC_FLAG})
139 if(NOT DEFINED CMAKE_SHARED_LIBRARY_SONAME_OBJCXX_FLAG)
140 set(CMAKE_SHARED_LIBRARY_SONAME_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_SONAME_OBJC_FLAG})
143 if(NOT CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG)
144 set(CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG})
147 if(NOT CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG_SEP)
148 set(CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG_SEP})
151 if(NOT CMAKE_EXECUTABLE_RPATH_LINK_OBJCXX_FLAG)
152 set(CMAKE_EXECUTABLE_RPATH_LINK_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJCXX_FLAG})
155 if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_OBJCXX_WITH_RUNTIME_PATH)
156 set(CMAKE_SHARED_LIBRARY_LINK_OBJCXX_WITH_RUNTIME_PATH ${CMAKE_SHARED_LIBRARY_LINK_OBJC_WITH_RUNTIME_PATH})
159 if(NOT CMAKE_INCLUDE_FLAG_OBJCXX)
160 set(CMAKE_INCLUDE_FLAG_OBJCXX ${CMAKE_INCLUDE_FLAG_C})
163 # for most systems a module is the same as a shared library
164 # so unless the variable CMAKE_MODULE_EXISTS is set just
165 # copy the values from the LIBRARY variables
166 if(NOT CMAKE_MODULE_EXISTS)
167 set(CMAKE_SHARED_MODULE_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_OBJCXX_FLAGS})
168 set(CMAKE_SHARED_MODULE_CREATE_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_OBJCXX_FLAGS})
172 if(NOT CMAKE_SHARED_MODULE_CREATE_OBJCXX_FLAGS)
173 set(CMAKE_SHARED_MODULE_CREATE_OBJCXX_FLAGS ${CMAKE_SHARED_MODULE_CREATE_OBJC_FLAGS})
176 if(NOT CMAKE_SHARED_MODULE_OBJCXX_FLAGS)
177 set(CMAKE_SHARED_MODULE_OBJCXX_FLAGS ${CMAKE_SHARED_MODULE_OBJC_FLAGS})
180 # Initialize OBJCXX link type selection flags from OBJC versions.
181 foreach(type IN ITEMS SHARED_LIBRARY SHARED_MODULE EXE)
182 if(NOT CMAKE_${type}_LINK_STATIC_OBJCXX_FLAGS)
183 set(CMAKE_${type}_LINK_STATIC_OBJCXX_FLAGS
184 ${CMAKE_${type}_LINK_STATIC_OBJC_FLAGS})
186 if(NOT CMAKE_${type}_LINK_DYNAMIC_OBJCXX_FLAGS)
187 set(CMAKE_${type}_LINK_DYNAMIC_OBJCXX_FLAGS
188 ${CMAKE_${type}_LINK_DYNAMIC_OBJC_FLAGS})
192 if(CMAKE_EXECUTABLE_FORMAT STREQUAL "ELF")
193 if(NOT DEFINED CMAKE_OBJCXX_LINK_WHAT_YOU_USE_FLAG)
194 set(CMAKE_OBJCXX_LINK_WHAT_YOU_USE_FLAG "LINKER:--no-as-needed")
196 if(NOT DEFINED CMAKE_LINK_WHAT_YOU_USE_CHECK)
197 set(CMAKE_LINK_WHAT_YOU_USE_CHECK ldd -u -r)
201 # add the flags to the cache based
202 # on the initial values computed in the platform/*.cmake files
203 # use _INIT variables so that this only happens the first time
204 # and you can set these flags in the cmake cache
205 set(CMAKE_OBJCXX_FLAGS_INIT "$ENV{OBJCXXFLAGS} ${CMAKE_OBJCXX_FLAGS_INIT}")
207 cmake_initialize_per_config_variable(CMAKE_OBJCXX_FLAGS "Flags used by the Objective-C++ compiler")
209 if(CMAKE_OBJCXX_STANDARD_LIBRARIES_INIT)
210 set(CMAKE_OBJCXX_STANDARD_LIBRARIES "${CMAKE_OBJCXX_STANDARD_LIBRARIES_INIT}"
211 CACHE STRING "Libraries linked by default with all Objective-C++ applications.")
212 mark_as_advanced(CMAKE_OBJCXX_STANDARD_LIBRARIES)
215 if(NOT CMAKE_OBJCXX_COMPILER_LAUNCHER AND DEFINED ENV{CMAKE_OBJCXX_COMPILER_LAUNCHER})
216 set(CMAKE_OBJCXX_COMPILER_LAUNCHER "$ENV{CMAKE_OBJCXX_COMPILER_LAUNCHER}"
217 CACHE STRING "Compiler launcher for OBJCXX.")
220 if(NOT CMAKE_OBJCXX_LINKER_LAUNCHER AND DEFINED ENV{CMAKE_OBJCXX_LINKER_LAUNCHER})
221 set(CMAKE_OBJCXX_LINKER_LAUNCHER "$ENV{CMAKE_OBJCXX_LINKER_LAUNCHER}"
222 CACHE STRING "Linker launcher for OBJCXX.")
225 include(CMakeCommonLanguageInclude)
227 # now define the following rules:
228 # CMAKE_OBJCXX_CREATE_SHARED_LIBRARY
229 # CMAKE_OBJCXX_CREATE_SHARED_MODULE
230 # CMAKE_OBJCXX_COMPILE_OBJECT
231 # CMAKE_OBJCXX_LINK_EXECUTABLE
233 # variables supplied by the generator at use time
235 # <TARGET_BASE> the target without the suffix
242 # Objective-C++ compiler information
243 # <CMAKE_OBJCXX_COMPILER>
244 # <CMAKE_SHARED_LIBRARY_CREATE_OBJCXX_FLAGS>
245 # <CMAKE_OBJCXX_SHARED_MODULE_CREATE_FLAGS>
246 # <CMAKE_OBJCXX_LINK_FLAGS>
248 # Static library tools
253 # create a shared Objective-C++ library
254 if(NOT CMAKE_OBJCXX_CREATE_SHARED_LIBRARY)
255 set(CMAKE_OBJCXX_CREATE_SHARED_LIBRARY
256 "<CMAKE_OBJCXX_COMPILER> <CMAKE_SHARED_LIBRARY_OBJCXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_OBJCXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
259 # create an Objective-C++ shared module copy the shared library rule by default
260 if(NOT CMAKE_OBJCXX_CREATE_SHARED_MODULE)
261 set(CMAKE_OBJCXX_CREATE_SHARED_MODULE ${CMAKE_OBJCXX_CREATE_SHARED_LIBRARY})
265 # Create a static archive incrementally for large object file counts.
266 # If CMAKE_OBJCXX_CREATE_STATIC_LIBRARY is set it will override these.
267 if(NOT DEFINED CMAKE_OBJCXX_ARCHIVE_CREATE)
268 set(CMAKE_OBJCXX_ARCHIVE_CREATE "<CMAKE_AR> qc <TARGET> <LINK_FLAGS> <OBJECTS>")
270 if(NOT DEFINED CMAKE_OBJCXX_ARCHIVE_APPEND)
271 set(CMAKE_OBJCXX_ARCHIVE_APPEND "<CMAKE_AR> q <TARGET> <LINK_FLAGS> <OBJECTS>")
273 if(NOT DEFINED CMAKE_OBJCXX_ARCHIVE_FINISH)
274 set(CMAKE_OBJCXX_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
277 # compile an Objective-C++ file into an object file
278 if(NOT CMAKE_OBJCXX_COMPILE_OBJECT)
279 set(CMAKE_OBJCXX_COMPILE_OBJECT
280 "<CMAKE_OBJCXX_COMPILER> <DEFINES> <INCLUDES> -x objective-c++ <FLAGS> -o <OBJECT> -c <SOURCE>")
283 if(NOT CMAKE_OBJCXX_LINK_EXECUTABLE)
284 set(CMAKE_OBJCXX_LINK_EXECUTABLE
285 "<CMAKE_OBJCXX_COMPILER> <FLAGS> <CMAKE_OBJCXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
289 CMAKE_VERBOSE_MAKEFILE
292 set(CMAKE_OBJCXX_INFORMATION_LOADED 1)