1 # Ask xcode-select where to find /Developer or fall back to ancient location.
2 execute_process(COMMAND xcode-select -print-path
3 OUTPUT_VARIABLE _stdout
4 OUTPUT_STRIP_TRAILING_WHITESPACE
6 RESULT_VARIABLE _failed)
7 if(NOT _failed AND IS_DIRECTORY ${_stdout})
8 set(OSX_DEVELOPER_ROOT ${_stdout})
9 elseif(IS_DIRECTORY "/Developer")
10 set(OSX_DEVELOPER_ROOT "/Developer")
12 set(OSX_DEVELOPER_ROOT "")
15 execute_process(COMMAND sw_vers -productVersion
16 OUTPUT_VARIABLE CURRENT_OSX_VERSION
17 OUTPUT_STRIP_TRAILING_WHITESPACE)
19 # Save CMAKE_OSX_ARCHITECTURES from the environment.
20 set(CMAKE_OSX_ARCHITECTURES "$ENV{CMAKE_OSX_ARCHITECTURES}" CACHE STRING
21 "Build architectures for OSX")
23 # macOS, iOS, tvOS, and watchOS should lookup compilers from
24 # Platform/Apple-${CMAKE_CXX_COMPILER_ID}-<LANG>
25 set(CMAKE_EFFECTIVE_SYSTEM_NAME "Apple")
27 #----------------------------------------------------------------------------
28 # _CURRENT_OSX_VERSION - as a two-component string: 10.5, 10.6, ...
30 string(REGEX REPLACE "^([0-9]+\\.[0-9]+).*$" "\\1"
31 _CURRENT_OSX_VERSION "${CURRENT_OSX_VERSION}")
33 #----------------------------------------------------------------------------
34 # CMAKE_OSX_DEPLOYMENT_TARGET
36 # Set cache variable - end user may change this during ccmake or cmake-gui configure.
37 if(CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND _CURRENT_OSX_VERSION VERSION_GREATER 10.3)
38 set(CMAKE_OSX_DEPLOYMENT_TARGET "$ENV{MACOSX_DEPLOYMENT_TARGET}" CACHE STRING
39 "Minimum OS X version to target for deployment (at runtime); newer APIs weak linked. Set to empty string for default value.")
42 #----------------------------------------------------------------------------
46 # Use the existing value without further computation to choose a default.
47 set(_CMAKE_OSX_SYSROOT_DEFAULT "${CMAKE_OSX_SYSROOT}")
48 elseif(NOT "x$ENV{SDKROOT}" STREQUAL "x" AND
49 (NOT "x$ENV{SDKROOT}" MATCHES "/" OR IS_DIRECTORY "$ENV{SDKROOT}"))
50 # Use the value of SDKROOT from the environment.
51 set(_CMAKE_OSX_SYSROOT_DEFAULT "$ENV{SDKROOT}")
52 elseif(CMAKE_SYSTEM_NAME STREQUAL iOS)
53 set(_CMAKE_OSX_SYSROOT_DEFAULT "iphoneos")
54 elseif(CMAKE_SYSTEM_NAME STREQUAL tvOS)
55 set(_CMAKE_OSX_SYSROOT_DEFAULT "appletvos")
56 elseif(CMAKE_SYSTEM_NAME STREQUAL watchOS)
57 set(_CMAKE_OSX_SYSROOT_DEFAULT "watchos")
58 elseif("${CMAKE_GENERATOR}" MATCHES Xcode
59 OR CMAKE_OSX_DEPLOYMENT_TARGET
60 OR CMAKE_OSX_ARCHITECTURES MATCHES "[^;]"
61 OR NOT EXISTS "/usr/include/sys/types.h")
62 # Find installed SDKs in either Xcode-4.3+ or pre-4.3 SDKs directory.
63 set(_CMAKE_OSX_SDKS_DIR "")
64 if(OSX_DEVELOPER_ROOT)
65 foreach(d Platforms/MacOSX.platform/Developer/SDKs SDKs)
66 file(GLOB _CMAKE_OSX_SDKS ${OSX_DEVELOPER_ROOT}/${d}/*)
68 set(_CMAKE_OSX_SDKS_DIR ${OSX_DEVELOPER_ROOT}/${d})
74 if(_CMAKE_OSX_SDKS_DIR)
75 # Select SDK for current OSX version accounting for the known
76 # specially named SDKs.
77 set(_CMAKE_OSX_SDKS_VER_SUFFIX_10.4 "u")
78 set(_CMAKE_OSX_SDKS_VER_SUFFIX_10.3 ".9")
81 set(_CMAKE_OSX_LATEST_SDK_VERSION "0.0")
82 file(GLOB _CMAKE_OSX_SDKS RELATIVE "${_CMAKE_OSX_SDKS_DIR}" "${_CMAKE_OSX_SDKS_DIR}/MacOSX*.sdk")
83 foreach(_SDK ${_CMAKE_OSX_SDKS})
84 if(_SDK MATCHES "MacOSX([0-9]+\\.[0-9]+)[^/]*\\.sdk" AND CMAKE_MATCH_1 VERSION_GREATER ${_CMAKE_OSX_LATEST_SDK_VERSION})
85 set(_CMAKE_OSX_LATEST_SDK_VERSION "${CMAKE_MATCH_1}")
89 # pick an SDK that works
90 set(_CMAKE_OSX_SYSROOT_DEFAULT)
91 foreach(ver ${CMAKE_OSX_DEPLOYMENT_TARGET}
92 ${_CURRENT_OSX_VERSION}
93 ${_CMAKE_OSX_LATEST_SDK_VERSION})
94 set(_CMAKE_OSX_DEPLOYMENT_TARGET ${ver})
95 set(_CMAKE_OSX_SDKS_VER ${_CMAKE_OSX_DEPLOYMENT_TARGET}${_CMAKE_OSX_SDKS_VER_SUFFIX_${_CMAKE_OSX_DEPLOYMENT_TARGET}})
96 set(_CMAKE_OSX_SYSROOT_CHECK "${_CMAKE_OSX_SDKS_DIR}/MacOSX${_CMAKE_OSX_SDKS_VER}.sdk")
97 if(IS_DIRECTORY "${_CMAKE_OSX_SYSROOT_CHECK}")
98 set(_CMAKE_OSX_SYSROOT_DEFAULT "${_CMAKE_OSX_SYSROOT_CHECK}")
103 if(NOT CMAKE_CROSSCOMPILING AND NOT CMAKE_OSX_DEPLOYMENT_TARGET AND _CURRENT_OSX_VERSION VERSION_LESS _CMAKE_OSX_DEPLOYMENT_TARGET)
104 set(CMAKE_OSX_DEPLOYMENT_TARGET ${_CURRENT_OSX_VERSION} CACHE STRING
105 "Minimum OS X version to target for deployment (at runtime); newer APIs weak linked. Set to empty string for default value." FORCE)
108 # Assume developer files are in root (such as Xcode 4.5 command-line tools).
109 set(_CMAKE_OSX_SYSROOT_DEFAULT "")
113 # Set cache variable - end user may change this during ccmake or cmake-gui configure.
114 # Choose the type based on the current value.
115 set(_CMAKE_OSX_SYSROOT_TYPE STRING)
116 foreach(v CMAKE_OSX_SYSROOT _CMAKE_OSX_SYSROOT_DEFAULT)
117 if("x${${v}}" MATCHES "/")
118 set(_CMAKE_OSX_SYSROOT_TYPE PATH)
122 set(CMAKE_OSX_SYSROOT "${_CMAKE_OSX_SYSROOT_DEFAULT}" CACHE ${_CMAKE_OSX_SYSROOT_TYPE}
123 "The product will be built against the headers and libraries located inside the indicated SDK.")
125 # Resolves the SDK name into a path
126 function(_apple_resolve_sdk_path sdk_name ret)
128 COMMAND xcrun -sdk ${sdk_name} --show-sdk-path
129 OUTPUT_VARIABLE _stdout
130 OUTPUT_STRIP_TRAILING_WHITESPACE
131 ERROR_VARIABLE _stderr
132 RESULT_VARIABLE _failed
134 set(${ret} "${_stdout}" PARENT_SCOPE)
136 # Handle multi-arch sysroots. Do this before CMAKE_OSX_SYSROOT is
137 # transformed into a path, so that we know the sysroot name.
138 function(_apple_resolve_multi_arch_sysroots)
139 if(DEFINED CMAKE_APPLE_ARCH_SYSROOTS)
140 return() # Already cached
143 list(LENGTH CMAKE_OSX_ARCHITECTURES _num_archs)
144 if(NOT (_num_archs GREATER 1))
145 return() # Only apply to multi-arch
148 if(CMAKE_OSX_SYSROOT STREQUAL "macosx")
149 # macOS doesn't have a simulator sdk / sysroot, so there is no need to handle per-sdk arches.
153 if(IS_DIRECTORY "${CMAKE_OSX_SYSROOT}")
154 if(NOT CMAKE_OSX_SYSROOT STREQUAL _CMAKE_OSX_SYSROOT_DEFAULT)
155 message(WARNING "Can not resolve multi-arch sysroots with CMAKE_OSX_SYSROOT set to path (${CMAKE_OSX_SYSROOT})")
160 string(REPLACE "os" "simulator" _simulator_sdk ${CMAKE_OSX_SYSROOT})
161 set(_sdks "${CMAKE_OSX_SYSROOT};${_simulator_sdk}")
162 foreach(sdk ${_sdks})
163 _apple_resolve_sdk_path(${sdk} _sdk_path)
164 if(NOT IS_DIRECTORY "${_sdk_path}")
165 message(WARNING "Failed to resolve SDK path for '${sdk}'")
170 COMMAND plutil -extract SupportedTargets.${sdk}.Archs json ${_sdk_path}/SDKSettings.plist -o -
171 OUTPUT_VARIABLE _sdk_archs_json
172 OUTPUT_STRIP_TRAILING_WHITESPACE
173 ERROR_VARIABLE _stderr
174 RESULT_VARIABLE _failed
177 # Failure to extract supported architectures for an SDK means that the installed SDK is old
178 # and does not provide such information (SDKs that come with Xcode >= 10.x started providing
179 # the information). In such a case, return early, and handle multi-arch builds the old way
180 # (no per-sdk arches).
184 # Poor man's JSON decoding
185 string(REGEX REPLACE "[]\\[\"]" "" _sdk_archs ${_sdk_archs_json})
186 string(REPLACE "," ";" _sdk_archs ${_sdk_archs})
188 set(_sdk_archs_${sdk} ${_sdk_archs})
189 set(_sdk_path_${sdk} ${_sdk_path})
192 foreach(arch ${CMAKE_OSX_ARCHITECTURES})
193 set(_arch_sysroot "")
194 foreach(sdk ${_sdks})
195 list(FIND _sdk_archs_${sdk} ${arch} arch_index)
196 if(NOT arch_index EQUAL -1)
197 set(_arch_sysroot ${_sdk_path_${sdk}})
202 list(APPEND _arch_sysroots ${_arch_sysroot})
204 message(WARNING "No SDK found for architecture '${arch}'")
205 list(APPEND _arch_sysroots "${arch}-SDK-NOTFOUND")
209 set(CMAKE_APPLE_ARCH_SYSROOTS "${_arch_sysroots}" CACHE INTERNAL
210 "Architecture dependent sysroots, one per CMAKE_OSX_ARCHITECTURES")
213 _apple_resolve_multi_arch_sysroots()
215 # Transform CMAKE_OSX_SYSROOT to absolute path
216 set(_CMAKE_OSX_SYSROOT_PATH "")
217 if(CMAKE_OSX_SYSROOT)
218 if("x${CMAKE_OSX_SYSROOT}" MATCHES "/")
219 # This is a path to the SDK. Make sure it exists.
220 if(NOT IS_DIRECTORY "${CMAKE_OSX_SYSROOT}")
221 message(WARNING "Ignoring CMAKE_OSX_SYSROOT value:\n ${CMAKE_OSX_SYSROOT}\n"
222 "because the directory does not exist.")
223 set(CMAKE_OSX_SYSROOT "")
225 set(_CMAKE_OSX_SYSROOT_PATH "${CMAKE_OSX_SYSROOT}")
227 _apple_resolve_sdk_path(${CMAKE_OSX_SYSROOT} _sdk_path)
228 if(IS_DIRECTORY "${_sdk_path}")
229 set(_CMAKE_OSX_SYSROOT_PATH "${_sdk_path}")
230 # For non-Xcode generators use the path.
231 if(NOT "${CMAKE_GENERATOR}" MATCHES "Xcode")
232 set(CMAKE_OSX_SYSROOT "${_CMAKE_OSX_SYSROOT_PATH}")