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# Ask xcode-select where to find /Developer or fall back to ancient location.
execute_process(COMMAND xcode-select -print-path
OUTPUT_VARIABLE _stdout
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_VARIABLE _stderr
RESULT_VARIABLE _failed)
if(NOT _failed AND IS_DIRECTORY ${_stdout})
set(OSX_DEVELOPER_ROOT ${_stdout})
elseif(IS_DIRECTORY "/Developer")
set(OSX_DEVELOPER_ROOT "/Developer")
else()
set(OSX_DEVELOPER_ROOT "")
endif()
execute_process(COMMAND sw_vers -productVersion
OUTPUT_VARIABLE CURRENT_OSX_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
# Save CMAKE_OSX_ARCHITECTURES from the environment.
set(CMAKE_OSX_ARCHITECTURES "$ENV{CMAKE_OSX_ARCHITECTURES}" CACHE STRING
"Build architectures for OSX")
# macOS, iOS, tvOS, and watchOS should lookup compilers from
# Platform/Apple-${CMAKE_CXX_COMPILER_ID}-<LANG>
set(CMAKE_EFFECTIVE_SYSTEM_NAME "Apple")
#----------------------------------------------------------------------------
# _CURRENT_OSX_VERSION - as a two-component string: 10.5, 10.6, ...
#
string(REGEX REPLACE "^([0-9]+\\.[0-9]+).*$" "\\1"
_CURRENT_OSX_VERSION "${CURRENT_OSX_VERSION}")
#----------------------------------------------------------------------------
# CMAKE_OSX_DEPLOYMENT_TARGET
# Set cache variable - end user may change this during ccmake or cmake-gui configure.
if(CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND _CURRENT_OSX_VERSION VERSION_GREATER 10.3)
set(CMAKE_OSX_DEPLOYMENT_TARGET "$ENV{MACOSX_DEPLOYMENT_TARGET}" CACHE STRING
"Minimum OS X version to target for deployment (at runtime); newer APIs weak linked. Set to empty string for default value.")
endif()
#----------------------------------------------------------------------------
# CMAKE_OSX_SYSROOT
if(CMAKE_OSX_SYSROOT)
# Use the existing value without further computation to choose a default.
set(_CMAKE_OSX_SYSROOT_DEFAULT "${CMAKE_OSX_SYSROOT}")
elseif(NOT "x$ENV{SDKROOT}" STREQUAL "x" AND
(NOT "x$ENV{SDKROOT}" MATCHES "/" OR IS_DIRECTORY "$ENV{SDKROOT}"))
# Use the value of SDKROOT from the environment.
set(_CMAKE_OSX_SYSROOT_DEFAULT "$ENV{SDKROOT}")
elseif(CMAKE_SYSTEM_NAME STREQUAL iOS)
set(_CMAKE_OSX_SYSROOT_DEFAULT "iphoneos")
elseif(CMAKE_SYSTEM_NAME STREQUAL tvOS)
set(_CMAKE_OSX_SYSROOT_DEFAULT "appletvos")
elseif(CMAKE_SYSTEM_NAME STREQUAL watchOS)
set(_CMAKE_OSX_SYSROOT_DEFAULT "watchos")
elseif("${CMAKE_GENERATOR}" MATCHES Xcode
OR CMAKE_OSX_DEPLOYMENT_TARGET
OR CMAKE_OSX_ARCHITECTURES MATCHES "[^;]"
OR NOT EXISTS "/usr/include/sys/types.h")
# Find installed SDKs in either Xcode-4.3+ or pre-4.3 SDKs directory.
set(_CMAKE_OSX_SDKS_DIR "")
if(OSX_DEVELOPER_ROOT)
foreach(d Platforms/MacOSX.platform/Developer/SDKs SDKs)
file(GLOB _CMAKE_OSX_SDKS ${OSX_DEVELOPER_ROOT}/${d}/*)
if(_CMAKE_OSX_SDKS)
set(_CMAKE_OSX_SDKS_DIR ${OSX_DEVELOPER_ROOT}/${d})
break()
endif()
endforeach()
endif()
if(_CMAKE_OSX_SDKS_DIR)
# Select SDK for current OSX version accounting for the known
# specially named SDKs.
set(_CMAKE_OSX_SDKS_VER_SUFFIX_10.4 "u")
set(_CMAKE_OSX_SDKS_VER_SUFFIX_10.3 ".9")
# find the latest SDK
set(_CMAKE_OSX_LATEST_SDK_VERSION "0.0")
file(GLOB _CMAKE_OSX_SDKS RELATIVE "${_CMAKE_OSX_SDKS_DIR}" "${_CMAKE_OSX_SDKS_DIR}/MacOSX*.sdk")
foreach(_SDK ${_CMAKE_OSX_SDKS})
if(_SDK MATCHES "MacOSX([0-9]+\\.[0-9]+)[^/]*\\.sdk" AND CMAKE_MATCH_1 VERSION_GREATER ${_CMAKE_OSX_LATEST_SDK_VERSION})
set(_CMAKE_OSX_LATEST_SDK_VERSION "${CMAKE_MATCH_1}")
endif()
endforeach()
# pick an SDK that works
set(_CMAKE_OSX_SYSROOT_DEFAULT)
foreach(ver ${CMAKE_OSX_DEPLOYMENT_TARGET}
${_CURRENT_OSX_VERSION}
${_CMAKE_OSX_LATEST_SDK_VERSION})
set(_CMAKE_OSX_DEPLOYMENT_TARGET ${ver})
set(_CMAKE_OSX_SDKS_VER ${_CMAKE_OSX_DEPLOYMENT_TARGET}${_CMAKE_OSX_SDKS_VER_SUFFIX_${_CMAKE_OSX_DEPLOYMENT_TARGET}})
set(_CMAKE_OSX_SYSROOT_CHECK "${_CMAKE_OSX_SDKS_DIR}/MacOSX${_CMAKE_OSX_SDKS_VER}.sdk")
if(IS_DIRECTORY "${_CMAKE_OSX_SYSROOT_CHECK}")
set(_CMAKE_OSX_SYSROOT_DEFAULT "${_CMAKE_OSX_SYSROOT_CHECK}")
break()
endif()
endforeach()
if(NOT CMAKE_CROSSCOMPILING AND NOT CMAKE_OSX_DEPLOYMENT_TARGET AND _CURRENT_OSX_VERSION VERSION_LESS _CMAKE_OSX_DEPLOYMENT_TARGET)
set(CMAKE_OSX_DEPLOYMENT_TARGET ${_CURRENT_OSX_VERSION} CACHE STRING
"Minimum OS X version to target for deployment (at runtime); newer APIs weak linked. Set to empty string for default value." FORCE)
endif()
else()
# Assume developer files are in root (such as Xcode 4.5 command-line tools).
set(_CMAKE_OSX_SYSROOT_DEFAULT "")
endif()
endif()
# Set cache variable - end user may change this during ccmake or cmake-gui configure.
# Choose the type based on the current value.
set(_CMAKE_OSX_SYSROOT_TYPE STRING)
foreach(v CMAKE_OSX_SYSROOT _CMAKE_OSX_SYSROOT_DEFAULT)
if("x${${v}}" MATCHES "/")
set(_CMAKE_OSX_SYSROOT_TYPE PATH)
break()
endif()
endforeach()
set(CMAKE_OSX_SYSROOT "${_CMAKE_OSX_SYSROOT_DEFAULT}" CACHE ${_CMAKE_OSX_SYSROOT_TYPE}
"The product will be built against the headers and libraries located inside the indicated SDK.")
# Resolves the SDK name into a path
function(_apple_resolve_sdk_path sdk_name ret)
execute_process(
COMMAND xcrun -sdk ${sdk_name} --show-sdk-path
OUTPUT_VARIABLE _stdout
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_VARIABLE _stderr
RESULT_VARIABLE _failed
)
set(${ret} "${_stdout}" PARENT_SCOPE)
endfunction()
# Handle multi-arch sysroots. Do this before CMAKE_OSX_SYSROOT is
# transformed into a path, so that we know the sysroot name.
function(_apple_resolve_multi_arch_sysroots)
if(DEFINED CMAKE_APPLE_ARCH_SYSROOTS)
return() # Already cached
endif()
list(LENGTH CMAKE_OSX_ARCHITECTURES _num_archs)
if(NOT (_num_archs GREATER 1))
return() # Only apply to multi-arch
endif()
if(CMAKE_OSX_SYSROOT STREQUAL "macosx")
# macOS doesn't have a simulator sdk / sysroot, so there is no need to handle per-sdk arches.
return()
endif()
if(IS_DIRECTORY "${CMAKE_OSX_SYSROOT}")
if(NOT CMAKE_OSX_SYSROOT STREQUAL _CMAKE_OSX_SYSROOT_DEFAULT)
message(WARNING "Can not resolve multi-arch sysroots with CMAKE_OSX_SYSROOT set to path (${CMAKE_OSX_SYSROOT})")
endif()
return()
endif()
string(REPLACE "os" "simulator" _simulator_sdk ${CMAKE_OSX_SYSROOT})
set(_sdks "${CMAKE_OSX_SYSROOT};${_simulator_sdk}")
foreach(sdk ${_sdks})
_apple_resolve_sdk_path(${sdk} _sdk_path)
if(NOT IS_DIRECTORY "${_sdk_path}")
message(WARNING "Failed to resolve SDK path for '${sdk}'")
continue()
endif()
execute_process(
COMMAND plutil -extract SupportedTargets.${sdk}.Archs json ${_sdk_path}/SDKSettings.plist -o -
OUTPUT_VARIABLE _sdk_archs_json
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_VARIABLE _stderr
RESULT_VARIABLE _failed
)
if(_failed)
# Failure to extract supported architectures for an SDK means that the installed SDK is old
# and does not provide such information (SDKs that come with Xcode >= 10.x started providing
# the information). In such a case, return early, and handle multi-arch builds the old way
# (no per-sdk arches).
return()
endif()
# Poor man's JSON decoding
string(REGEX REPLACE "[]\\[\"]" "" _sdk_archs ${_sdk_archs_json})
string(REPLACE "," ";" _sdk_archs ${_sdk_archs})
set(_sdk_archs_${sdk} ${_sdk_archs})
set(_sdk_path_${sdk} ${_sdk_path})
endforeach()
foreach(arch ${CMAKE_OSX_ARCHITECTURES})
set(_arch_sysroot "")
foreach(sdk ${_sdks})
list(FIND _sdk_archs_${sdk} ${arch} arch_index)
if(NOT arch_index EQUAL -1)
set(_arch_sysroot ${_sdk_path_${sdk}})
break()
endif()
endforeach()
if(_arch_sysroot)
list(APPEND _arch_sysroots ${_arch_sysroot})
else()
message(WARNING "No SDK found for architecture '${arch}'")
list(APPEND _arch_sysroots "${arch}-SDK-NOTFOUND")
endif()
endforeach()
set(CMAKE_APPLE_ARCH_SYSROOTS "${_arch_sysroots}" CACHE INTERNAL
"Architecture dependent sysroots, one per CMAKE_OSX_ARCHITECTURES")
endfunction()
_apple_resolve_multi_arch_sysroots()
# Transform CMAKE_OSX_SYSROOT to absolute path
set(_CMAKE_OSX_SYSROOT_PATH "")
if(CMAKE_OSX_SYSROOT)
if("x${CMAKE_OSX_SYSROOT}" MATCHES "/")
# This is a path to the SDK. Make sure it exists.
if(NOT IS_DIRECTORY "${CMAKE_OSX_SYSROOT}")
message(WARNING "Ignoring CMAKE_OSX_SYSROOT value:\n ${CMAKE_OSX_SYSROOT}\n"
"because the directory does not exist.")
set(CMAKE_OSX_SYSROOT "")
endif()
set(_CMAKE_OSX_SYSROOT_PATH "${CMAKE_OSX_SYSROOT}")
else()
_apple_resolve_sdk_path(${CMAKE_OSX_SYSROOT} _sdk_path)
if(IS_DIRECTORY "${_sdk_path}")
set(_CMAKE_OSX_SYSROOT_PATH "${_sdk_path}")
# For non-Xcode generators use the path.
if(NOT "${CMAKE_GENERATOR}" MATCHES "Xcode")
set(CMAKE_OSX_SYSROOT "${_CMAKE_OSX_SYSROOT_PATH}")
endif()
endif()
endif()
endif()
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