1# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
2# file Copyright.txt or https://cmake.org/licensing for details.
3
4
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
7# if it exists.
8# It also loads a system - compiler - processor (or target hardware)
9# specific file, which is mainly useful for crosscompiling and embedded systems.
10
11include(CMakeLanguageInformation)
12
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
15set(CMAKE_OBJCXX_OUTPUT_EXTENSION .o)
16
17set(_INCLUDED_FILE 0)
18
19# Load compiler-specific information.
20if(CMAKE_OBJCXX_COMPILER_ID)
21  include(Compiler/${CMAKE_OBJCXX_COMPILER_ID}-OBJCXX OPTIONAL)
22endif()
23
24set(CMAKE_BASE_NAME)
25get_filename_component(CMAKE_BASE_NAME "${CMAKE_OBJCXX_COMPILER}" NAME_WE)
26# since the gnu compiler has several names force g++
27if(CMAKE_COMPILER_IS_GNUOBJCXX)
28  set(CMAKE_BASE_NAME g++)
29endif()
30
31
32# load a hardware specific file, mostly useful for embedded compilers
33if(CMAKE_SYSTEM_PROCESSOR)
34  if(CMAKE_OBJCXX_COMPILER_ID)
35    include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_OBJCXX_COMPILER_ID}-OBJCXX-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
36  endif()
37  if (NOT _INCLUDED_FILE)
38    include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
39  endif ()
40endif()
41
42# load the system- and compiler specific files
43if(CMAKE_OBJCXX_COMPILER_ID)
44  include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_OBJCXX_COMPILER_ID}-OBJCXX OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
45endif()
46if (NOT _INCLUDED_FILE)
47  include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL
48          RESULT_VARIABLE _INCLUDED_FILE)
49endif ()
50
51# load any compiler-wrapper specific information
52if (CMAKE_OBJCXX_COMPILER_WRAPPER)
53  __cmake_include_compiler_wrapper(OBJCXX)
54endif ()
55
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.
60if (NOT _INCLUDED_FILE)
61  include(Platform/${CMAKE_SYSTEM_NAME} OPTIONAL)
62endif ()
63
64if(CMAKE_OBJCXX_SIZEOF_DATA_PTR)
65  foreach(f ${CMAKE_OBJCXX_ABI_FILES})
66    include(${f})
67  endforeach()
68  unset(CMAKE_OBJCXX_ABI_FILES)
69endif()
70
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.
76
77if(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}")
81endif()
82
83if(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}")
87endif()
88
89
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
93if(NOT CMAKE_SHARED_LIBRARY_CREATE_OBJCXX_FLAGS)
94  set(CMAKE_SHARED_LIBRARY_CREATE_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_OBJC_FLAGS})
95endif()
96
97if(NOT CMAKE_OBJCXX_COMPILE_OPTIONS_PIC)
98  set(CMAKE_OBJCXX_COMPILE_OPTIONS_PIC ${CMAKE_OBJC_COMPILE_OPTIONS_PIC})
99endif()
100
101if(NOT CMAKE_OBJCXX_COMPILE_OPTIONS_PIE)
102  set(CMAKE_OBJCXX_COMPILE_OPTIONS_PIE ${CMAKE_OBJC_COMPILE_OPTIONS_PIE})
103endif()
104if(NOT CMAKE_OBJCXX_LINK_OPTIONS_PIE)
105  set(CMAKE_OBJCXX_LINK_OPTIONS_PIE ${CMAKE_OBJC_LINK_OPTIONS_PIE})
106endif()
107if(NOT CMAKE_OBJCXX_LINK_OPTIONS_NO_PIE)
108  set(CMAKE_OBJCXX_LINK_OPTIONS_NO_PIE ${CMAKE_OBJC_LINK_OPTIONS_NO_PIE})
109endif()
110
111if(NOT CMAKE_OBJCXX_COMPILE_OPTIONS_DLL)
112  set(CMAKE_OBJCXX_COMPILE_OPTIONS_DLL ${CMAKE_OBJC_COMPILE_OPTIONS_DLL})
113endif()
114
115if(NOT CMAKE_SHARED_LIBRARY_OBJCXX_FLAGS)
116  set(CMAKE_SHARED_LIBRARY_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_OBJC_FLAGS})
117endif()
118
119if(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_OBJCXX_FLAGS)
120  set(CMAKE_SHARED_LIBRARY_LINK_OBJCXX_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_OBJC_FLAGS})
121endif()
122
123if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG)
124  set(CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJC_FLAG})
125endif()
126
127if(NOT CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG_SEP)
128  set(CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJC_FLAG_SEP})
129endif()
130
131if(NOT CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJCXX_FLAG)
132  set(CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJC_FLAG})
133endif()
134
135if(NOT DEFINED CMAKE_EXE_EXPORTS_OBJCXX_FLAG)
136  set(CMAKE_EXE_EXPORTS_OBJCXX_FLAG ${CMAKE_EXE_EXPORTS_OBJC_FLAG})
137endif()
138
139if(NOT DEFINED CMAKE_SHARED_LIBRARY_SONAME_OBJCXX_FLAG)
140  set(CMAKE_SHARED_LIBRARY_SONAME_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_SONAME_OBJC_FLAG})
141endif()
142
143if(NOT CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG)
144  set(CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG})
145endif()
146
147if(NOT CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG_SEP)
148  set(CMAKE_EXECUTABLE_RUNTIME_OBJCXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_OBJCXX_FLAG_SEP})
149endif()
150
151if(NOT CMAKE_EXECUTABLE_RPATH_LINK_OBJCXX_FLAG)
152  set(CMAKE_EXECUTABLE_RPATH_LINK_OBJCXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_OBJCXX_FLAG})
153endif()
154
155if(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})
157endif()
158
159if(NOT CMAKE_INCLUDE_FLAG_OBJCXX)
160  set(CMAKE_INCLUDE_FLAG_OBJCXX ${CMAKE_INCLUDE_FLAG_C})
161endif()
162
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
166if(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})
169endif()
170
171# repeat for modules
172if(NOT CMAKE_SHARED_MODULE_CREATE_OBJCXX_FLAGS)
173  set(CMAKE_SHARED_MODULE_CREATE_OBJCXX_FLAGS ${CMAKE_SHARED_MODULE_CREATE_OBJC_FLAGS})
174endif()
175
176if(NOT CMAKE_SHARED_MODULE_OBJCXX_FLAGS)
177  set(CMAKE_SHARED_MODULE_OBJCXX_FLAGS ${CMAKE_SHARED_MODULE_OBJC_FLAGS})
178endif()
179
180# Initialize OBJCXX link type selection flags from OBJC versions.
181foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
182  if(NOT CMAKE_${type}_LINK_STATIC_OBJCXX_FLAGS)
183    set(CMAKE_${type}_LINK_STATIC_OBJCXX_FLAGS
184      ${CMAKE_${type}_LINK_STATIC_OBJC_FLAGS})
185  endif()
186  if(NOT CMAKE_${type}_LINK_DYNAMIC_OBJCXX_FLAGS)
187    set(CMAKE_${type}_LINK_DYNAMIC_OBJCXX_FLAGS
188      ${CMAKE_${type}_LINK_DYNAMIC_OBJC_FLAGS})
189  endif()
190endforeach()
191
192if(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")
195  endif()
196  if(NOT DEFINED CMAKE_LINK_WHAT_YOU_USE_CHECK)
197    set(CMAKE_LINK_WHAT_YOU_USE_CHECK ldd -u -r)
198  endif()
199endif()
200
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
205set(CMAKE_OBJCXX_FLAGS_INIT "$ENV{OBJCXXFLAGS} ${CMAKE_OBJCXX_FLAGS_INIT}")
206
207cmake_initialize_per_config_variable(CMAKE_OBJCXX_FLAGS "Flags used by the Objective-C++ compiler")
208
209if(CMAKE_OBJCXX_STANDARD_LIBRARIES_INIT)
210  set(CMAKE_OBJCXX_STANDARD_LIBRARIES "${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)
213endif()
214
215if(NOT CMAKE_OBJCXX_COMPILER_LAUNCHER AND DEFINED ENV{CMAKE_OBJCXX_COMPILER_LAUNCHER})
216  set(CMAKE_OBJCXX_COMPILER_LAUNCHER "$ENV{CMAKE_OBJCXX_COMPILER_LAUNCHER}"
217    CACHE STRING "Compiler launcher for OBJCXX.")
218endif()
219
220if(NOT CMAKE_OBJCXX_LINKER_LAUNCHER AND DEFINED ENV{CMAKE_OBJCXX_LINKER_LAUNCHER})
221  set(CMAKE_OBJCXX_LINKER_LAUNCHER "$ENV{CMAKE_OBJCXX_LINKER_LAUNCHER}"
222    CACHE STRING "Linker launcher for OBJCXX.")
223endif()
224
225include(CMakeCommonLanguageInclude)
226
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
232
233# variables supplied by the generator at use time
234# <TARGET>
235# <TARGET_BASE> the target without the suffix
236# <OBJECTS>
237# <OBJECT>
238# <LINK_LIBRARIES>
239# <FLAGS>
240# <LINK_FLAGS>
241
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>
247
248# Static library tools
249# <CMAKE_AR>
250# <CMAKE_RANLIB>
251
252
253# create a shared Objective-C++ library
254if(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>")
257endif()
258
259# create an Objective-C++ shared module copy the shared library rule by default
260if(NOT CMAKE_OBJCXX_CREATE_SHARED_MODULE)
261  set(CMAKE_OBJCXX_CREATE_SHARED_MODULE ${CMAKE_OBJCXX_CREATE_SHARED_LIBRARY})
262endif()
263
264
265# Create a static archive incrementally for large object file counts.
266# If CMAKE_OBJCXX_CREATE_STATIC_LIBRARY is set it will override these.
267if(NOT DEFINED CMAKE_OBJCXX_ARCHIVE_CREATE)
268  set(CMAKE_OBJCXX_ARCHIVE_CREATE "<CMAKE_AR> qc <TARGET> <LINK_FLAGS> <OBJECTS>")
269endif()
270if(NOT DEFINED CMAKE_OBJCXX_ARCHIVE_APPEND)
271  set(CMAKE_OBJCXX_ARCHIVE_APPEND "<CMAKE_AR> q <TARGET> <LINK_FLAGS> <OBJECTS>")
272endif()
273if(NOT DEFINED CMAKE_OBJCXX_ARCHIVE_FINISH)
274  set(CMAKE_OBJCXX_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
275endif()
276
277# compile an Objective-C++ file into an object file
278if(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>")
281endif()
282
283if(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>")
286endif()
287
288mark_as_advanced(
289CMAKE_VERBOSE_MAKEFILE
290)
291
292set(CMAKE_OBJCXX_INFORMATION_LOADED 1)
293