CMake/Modules/Platform/Darwin.cmake
Brad King 7d47c69365 Drop compatibility with CMake < 2.4
Drop all behavior activated by setting CMAKE_BACKWARDS_COMPATIBILITY to
a value lower than 2.4, and generate an error when projects or the user
attempt to do so.  In the error suggest using a CMake 2.8.x release.

Teach cmake_minimum_required to warn about projects that do not require
at least CMake 2.4.  They are not supported by CMake >= 3.0.

Replace the documentation of CMAKE_BACKWARDS_COMPATIBILITY with a
reference to policy CMP0001.
2013-10-23 08:54:31 -04:00

360 lines
15 KiB
CMake

set(APPLE 1)
# Darwin versions:
# 6.x == Mac OSX 10.2 (Jaguar)
# 7.x == Mac OSX 10.3 (Panther)
# 8.x == Mac OSX 10.4 (Tiger)
# 9.x == Mac OSX 10.5 (Leopard)
# 10.x == Mac OSX 10.6 (Snow Leopard)
# 11.x == Mac OSX 10.7 (Lion)
# 12.x == Mac OSX 10.8 (Mountain Lion)
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\1" DARWIN_MAJOR_VERSION "${CMAKE_SYSTEM_VERSION}")
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\2" DARWIN_MINOR_VERSION "${CMAKE_SYSTEM_VERSION}")
# Do not use the "-Wl,-search_paths_first" flag with the OSX 10.2 compiler.
# Done this way because it is too early to do a TRY_COMPILE.
if(NOT DEFINED HAVE_FLAG_SEARCH_PATHS_FIRST)
set(HAVE_FLAG_SEARCH_PATHS_FIRST 0)
if("${DARWIN_MAJOR_VERSION}" GREATER 6)
set(HAVE_FLAG_SEARCH_PATHS_FIRST 1)
endif()
endif()
# More desirable, but does not work:
#include(CheckCXXCompilerFlag)
#CHECK_CXX_COMPILER_FLAG("-Wl,-search_paths_first" HAVE_FLAG_SEARCH_PATHS_FIRST)
set(CMAKE_SHARED_LIBRARY_PREFIX "lib")
set(CMAKE_SHARED_LIBRARY_SUFFIX ".dylib")
set(CMAKE_SHARED_MODULE_PREFIX "lib")
set(CMAKE_SHARED_MODULE_SUFFIX ".so")
set(CMAKE_MODULE_EXISTS 1)
set(CMAKE_DL_LIBS "")
# Enable rpath support for 10.5 and greater where it is known to work.
if("${DARWIN_MAJOR_VERSION}" GREATER 8)
set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")
endif()
set(CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ")
set(CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ")
set(CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}")
set(CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}")
set(CMAKE_C_LINK_FLAGS "-Wl,-headerpad_max_install_names")
set(CMAKE_CXX_LINK_FLAGS "-Wl,-headerpad_max_install_names")
if(HAVE_FLAG_SEARCH_PATHS_FIRST)
set(CMAKE_C_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_C_LINK_FLAGS}")
set(CMAKE_CXX_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_CXX_LINK_FLAGS}")
endif()
set(CMAKE_PLATFORM_HAS_INSTALLNAME 1)
set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names")
set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -Wl,-headerpad_max_install_names")
set(CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,")
set(CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a")
# hack: if a new cmake (which uses CMAKE_INSTALL_NAME_TOOL) runs on an old build tree
# (where install_name_tool was hardcoded) and where CMAKE_INSTALL_NAME_TOOL isn't in the cache
# and still cmake didn't fail in CMakeFindBinUtils.cmake (because it isn't rerun)
# hardcode CMAKE_INSTALL_NAME_TOOL here to install_name_tool, so it behaves as it did before, Alex
if(NOT DEFINED CMAKE_INSTALL_NAME_TOOL)
find_program(CMAKE_INSTALL_NAME_TOOL install_name_tool)
mark_as_advanced(CMAKE_INSTALL_NAME_TOOL)
endif()
# 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")
#----------------------------------------------------------------------------
# _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(_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_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")
if(CMAKE_OSX_DEPLOYMENT_TARGET)
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}")
else()
set(_CMAKE_OSX_SDKS_VER ${_CURRENT_OSX_VERSION}${_CMAKE_OSX_SDKS_VER_SUFFIX_${_CURRENT_OSX_VERSION}})
set(_CMAKE_OSX_SYSROOT_DEFAULT "${_CMAKE_OSX_SDKS_DIR}/MacOSX${_CMAKE_OSX_SDKS_VER}.sdk")
message(WARNING
"CMAKE_OSX_DEPLOYMENT_TARGET is '${CMAKE_OSX_DEPLOYMENT_TARGET}' "
"but the matching SDK does not exist at:\n \"${_CMAKE_OSX_SYSROOT_CHECK}\"\n"
"Instead using SDK:\n \"${_CMAKE_OSX_SYSROOT_DEFAULT}\"\n"
"matching the host OS X version."
)
endif()
else()
set(_CMAKE_OSX_SDKS_VER ${_CURRENT_OSX_VERSION}${_CMAKE_OSX_SDKS_VER_SUFFIX_${_CURRENT_OSX_VERSION}})
set(_CMAKE_OSX_SYSROOT_DEFAULT "${_CMAKE_OSX_SDKS_DIR}/MacOSX${_CMAKE_OSX_SDKS_VER}.sdk")
endif()
else()
# Assume developer files are in root (such as Xcode 4.5 command-line tools).
set(_CMAKE_OSX_SYSROOT_DEFAULT "")
endif()
endif()
# Set cache variable - end user may change this during ccmake or cmake-gui configure.
# Choose the type based on the current value.
set(_CMAKE_OSX_SYSROOT_TYPE STRING)
foreach(v CMAKE_OSX_SYSROOT _CMAKE_OSX_SYSROOT_DEFAULT)
if("x${${v}}" MATCHES "/")
set(_CMAKE_OSX_SYSROOT_TYPE PATH)
break()
endif()
endforeach()
set(CMAKE_OSX_SYSROOT "${_CMAKE_OSX_SYSROOT_DEFAULT}" CACHE ${_CMAKE_OSX_SYSROOT_TYPE}
"The product will be built against the headers and libraries located inside the indicated SDK.")
# Transform the cached value to something we can use.
set(_CMAKE_OSX_SYSROOT_ORIG "${CMAKE_OSX_SYSROOT}")
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 ${CMAKE_OSX_SYSROOT}\n"
"because the directory does not exist.")
set(CMAKE_OSX_SYSROOT "")
set(_CMAKE_OSX_SYSROOT_ORIG "")
endif()
set(_CMAKE_OSX_SYSROOT_PATH "${CMAKE_OSX_SYSROOT}")
else()
# Transform the sdk name into a path.
execute_process(
COMMAND xcodebuild -sdk ${CMAKE_OSX_SYSROOT} -version Path
OUTPUT_VARIABLE _stdout
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_VARIABLE _stderr
RESULT_VARIABLE _failed
)
if(NOT _failed AND IS_DIRECTORY "${_stdout}")
set(_CMAKE_OSX_SYSROOT_PATH "${_stdout}")
# For non-Xcode generators use the path.
if(NOT "${CMAKE_GENERATOR}" MATCHES "Xcode")
set(CMAKE_OSX_SYSROOT "${_CMAKE_OSX_SYSROOT_PATH}")
endif()
endif()
endif()
endif()
# Make sure the combination of SDK and Deployment Target are allowed
if(CMAKE_OSX_DEPLOYMENT_TARGET)
if("${_CMAKE_OSX_SYSROOT_PATH}" MATCHES "^.*/MacOSX([0-9]+\\.[0-9]+)[^/]*\\.sdk")
set(_sdk_ver "${CMAKE_MATCH_1}")
elseif("${_CMAKE_OSX_SYSROOT_ORIG}" MATCHES "^macosx([0-9]+\\.[0-9]+)$")
set(_sdk_ver "${CMAKE_MATCH_1}")
else()
message(FATAL_ERROR
"CMAKE_OSX_DEPLOYMENT_TARGET is '${CMAKE_OSX_DEPLOYMENT_TARGET}' "
"but CMAKE_OSX_SYSROOT:\n \"${_CMAKE_OSX_SYSROOT_ORIG}\"\n"
"is not set to a MacOSX SDK with a recognized version. "
"Either set CMAKE_OSX_SYSROOT to a valid SDK or set "
"CMAKE_OSX_DEPLOYMENT_TARGET to empty.")
endif()
if(CMAKE_OSX_DEPLOYMENT_TARGET VERSION_GREATER "${_sdk_ver}")
message(FATAL_ERROR
"CMAKE_OSX_DEPLOYMENT_TARGET (${CMAKE_OSX_DEPLOYMENT_TARGET}) "
"is greater than CMAKE_OSX_SYSROOT SDK:\n ${_CMAKE_OSX_SYSROOT_ORIG}\n"
"Please set CMAKE_OSX_DEPLOYMENT_TARGET to ${_sdk_ver} or lower.")
endif()
endif()
# Enable shared library versioning.
set(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-install_name")
# Xcode does not support -isystem yet.
if(XCODE)
set(CMAKE_INCLUDE_SYSTEM_FLAG_C)
set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX)
endif()
if("${_CURRENT_OSX_VERSION}" VERSION_LESS "10.5")
# Need to list dependent shared libraries on link line. When building
# with -isysroot (for universal binaries), the linker always looks for
# dependent libraries under the sysroot. Listing them on the link
# line works around the problem.
set(CMAKE_LINK_DEPENDENT_LIBRARY_FILES 1)
endif()
set(CMAKE_C_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS -w)
set(CMAKE_CXX_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS -w)
set(CMAKE_C_CREATE_SHARED_LIBRARY
"<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_CXX_CREATE_SHARED_LIBRARY
"<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_Fortran_CREATE_SHARED_LIBRARY
"<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_CXX_CREATE_SHARED_MODULE
"<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_C_CREATE_SHARED_MODULE
"<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_Fortran_CREATE_SHARED_MODULE
"<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_C_CREATE_MACOSX_FRAMEWORK
"<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_CXX_CREATE_MACOSX_FRAMEWORK
"<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
# Set default framework search path flag for languages known to use a
# preprocessor that may find headers in frameworks.
set(CMAKE_C_FRAMEWORK_SEARCH_FLAG -F)
set(CMAKE_CXX_FRAMEWORK_SEARCH_FLAG -F)
set(CMAKE_Fortran_FRAMEWORK_SEARCH_FLAG -F)
# default to searching for frameworks first
if(NOT DEFINED CMAKE_FIND_FRAMEWORK)
set(CMAKE_FIND_FRAMEWORK FIRST)
endif()
# Older OS X linkers do not report their framework search path
# with -v but "man ld" documents the following locations.
set(CMAKE_PLATFORM_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES
${_CMAKE_OSX_SYSROOT_PATH}/Library/Frameworks
${_CMAKE_OSX_SYSROOT_PATH}/System/Library/Frameworks
)
if(_CMAKE_OSX_SYSROOT_PATH)
# Treat some paths as implicit so we do not override the SDK versions.
list(APPEND CMAKE_PLATFORM_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES
/System/Library/Frameworks)
endif()
if("${_CURRENT_OSX_VERSION}" VERSION_LESS "10.5")
# Older OS X tools had more implicit paths.
list(APPEND CMAKE_PLATFORM_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES
${_CMAKE_OSX_SYSROOT_PATH}/Network/Library/Frameworks)
endif()
# set up the default search directories for frameworks
set(CMAKE_SYSTEM_FRAMEWORK_PATH
~/Library/Frameworks
)
if(_CMAKE_OSX_SYSROOT_PATH)
list(APPEND CMAKE_SYSTEM_FRAMEWORK_PATH
${_CMAKE_OSX_SYSROOT_PATH}/Library/Frameworks
${_CMAKE_OSX_SYSROOT_PATH}/Network/Library/Frameworks
${_CMAKE_OSX_SYSROOT_PATH}/System/Library/Frameworks
)
endif()
list(APPEND CMAKE_SYSTEM_FRAMEWORK_PATH
/Library/Frameworks
/Network/Library/Frameworks
/System/Library/Frameworks)
# Warn about known system mis-configuration case.
if(CMAKE_OSX_SYSROOT)
get_property(_IN_TC GLOBAL PROPERTY IN_TRY_COMPILE)
if(NOT _IN_TC AND
NOT IS_SYMLINK "${CMAKE_OSX_SYSROOT}/Library/Frameworks"
AND IS_SYMLINK "${CMAKE_OSX_SYSROOT}/Library/Frameworks/Frameworks")
message(WARNING "The SDK Library/Frameworks path\n"
" ${CMAKE_OSX_SYSROOT}/Library/Frameworks\n"
"is not set up correctly on this system. "
"This is known to occur when installing Xcode 3.2.6:\n"
" http://bugs.python.org/issue14018\n"
"The problem may cause build errors that report missing system frameworks. "
"Fix your SDK symlinks to resolve this issue and avoid this warning."
)
endif()
endif()
# default to searching for application bundles first
if(NOT DEFINED CMAKE_FIND_APPBUNDLE)
set(CMAKE_FIND_APPBUNDLE FIRST)
endif()
# set up the default search directories for application bundles
set(_apps_paths)
foreach(_path
"~/Applications"
"/Applications"
"${OSX_DEVELOPER_ROOT}/../Applications" # Xcode 4.3+
"${OSX_DEVELOPER_ROOT}/Applications" # pre-4.3
)
get_filename_component(_apps "${_path}" ABSOLUTE)
if(EXISTS "${_apps}")
list(APPEND _apps_paths "${_apps}")
endif()
endforeach()
list(REMOVE_DUPLICATES _apps_paths)
set(CMAKE_SYSTEM_APPBUNDLE_PATH
${_apps_paths})
unset(_apps_paths)
include(Platform/UnixPaths)
if(_CMAKE_OSX_SYSROOT_PATH AND EXISTS ${_CMAKE_OSX_SYSROOT_PATH}/usr/include)
list(APPEND CMAKE_SYSTEM_PREFIX_PATH ${_CMAKE_OSX_SYSROOT_PATH}/usr)
foreach(lang C CXX)
list(APPEND CMAKE_${lang}_IMPLICIT_INCLUDE_DIRECTORIES ${_CMAKE_OSX_SYSROOT_PATH}/usr/include)
endforeach()
endif()
list(APPEND CMAKE_SYSTEM_PREFIX_PATH
/sw # Fink
/opt/local # MacPorts
)