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CMake/Modules/Platform/Darwin.cmake
Modestas Vainius e1409ac59b Support building shared libraries or modules without soname (#13155) 
Add a boolean target property NO_SONAME which may be used to disable
soname for the specified shared library or module even if the platform
supports it.  This property should be useful for private shared
libraries or various plugins which live in private directories and have
not been designed to be found or loaded globally.

Replace references to <CMAKE_SHARED_LIBRARY_SONAME_${LANG}_FLAG> and
hard-coded -install_name flags with a conditional <SONAME_FLAG> which is
expanded to the value of the CMAKE_SHARED_LIBRARY_SONAME_${LANG}_FLAG
definition as long as soname supports is enabled for the target in
question.  Keep expanding CMAKE_SHARED_LIBRARY_SONAME_${LANG}_FLAG in
rules in case third party projects still use it.  Such projects would
not yet use NO_SONAME so the adjacent <TARGET_SONAME> will always be
expanded.  Make <TARGET_INSTALLNAME_DIR> NO_SONAME aware as well.  Since
-install_name is soname on OS X, this should not be a problem if this
variable is expanded only if soname is enabled.

The Ninja generator performs rule variable substitution only once
globally per rule to put its own placeholders.  Final substitution is
performed by ninja at build time.  Therefore we cannot conditionally
replace the soname placeholders on a per-target basis.  Rather than
omitting $SONAME from rules.ninja, simply do not write its contents for
targets which have NO_SONAME.  Since 3 variables are affected by
NO_SONAME ($SONAME, $SONAME_FLAG, $INSTALLNAME_DIR), set them only if
soname is enabled.
2012-04-30 11:50:27 -04:00

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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("${DARWIN_MAJOR_VERSION}" GREATER 6)
SET(HAVE_FLAG_SEARCH_PATHS_FIRST 1)
ENDIF("${DARWIN_MAJOR_VERSION}" GREATER 6)
ENDIF(NOT DEFINED HAVE_FLAG_SEARCH_PATHS_FIRST)
# 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 "")
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(HAVE_FLAG_SEARCH_PATHS_FIRST)
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(NOT DEFINED CMAKE_INSTALL_NAME_TOOL)
# Set the assumed (Pre 10.5 or Default) location of the developer tools
SET(OSX_DEVELOPER_ROOT "/Developer")
# Use the xcode-select tool if it's available (Xcode >= 3.0 installations)
FIND_PROGRAM(CMAKE_XCODE_SELECT xcode-select)
MARK_AS_ADVANCED(CMAKE_XCODE_SELECT)
IF(CMAKE_XCODE_SELECT)
EXECUTE_PROCESS(COMMAND ${CMAKE_XCODE_SELECT} "-print-path"
OUTPUT_VARIABLE OSX_DEVELOPER_ROOT
OUTPUT_STRIP_TRAILING_WHITESPACE)
ENDIF(CMAKE_XCODE_SELECT)
# Find installed SDKs
# Start with Xcode-4.3+ default SDKs directory
SET(_CMAKE_OSX_SDKS_DIR
"${OSX_DEVELOPER_ROOT}/Platforms/MacOSX.platform/Developer/SDKs")
FILE(GLOB _CMAKE_OSX_SDKS "${_CMAKE_OSX_SDKS_DIR}/*")
# If not present, try pre-4.3 SDKs directory
IF(NOT _CMAKE_OSX_SDKS)
SET(_CMAKE_OSX_SDKS_DIR "${OSX_DEVELOPER_ROOT}/SDKs")
FILE(GLOB _CMAKE_OSX_SDKS "${_CMAKE_OSX_SDKS_DIR}/*")
ENDIF(NOT _CMAKE_OSX_SDKS)
EXECUTE_PROCESS(COMMAND sw_vers -productVersion
OUTPUT_VARIABLE CURRENT_OSX_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
#----------------------------------------------------------------------------
# _CURRENT_OSX_VERSION - as a two-component string: 10.5, 10.6, ...
#
STRING(REGEX REPLACE "^([0-9]+\\.[0-9]+).*$" "\\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(_CURRENT_OSX_VERSION VERSION_GREATER 10.3)
#----------------------------------------------------------------------------
# CMAKE_OSX_SYSROOT
# Environment variable set by the user overrides our default.
# Use the same environment variable that Xcode uses.
SET(ENV_SDKROOT "$ENV{SDKROOT}")
# Set CMAKE_OSX_SYSROOT_DEFAULT based on _CURRENT_OSX_VERSION,
# accounting for the known specially named SDKs.
SET(CMAKE_OSX_SYSROOT_DEFAULT
"${_CMAKE_OSX_SDKS_DIR}/MacOSX${_CURRENT_OSX_VERSION}.sdk")
IF(_CURRENT_OSX_VERSION STREQUAL "10.4")
SET(CMAKE_OSX_SYSROOT_DEFAULT
"${_CMAKE_OSX_SDKS_DIR}/MacOSX10.4u.sdk")
ENDIF(_CURRENT_OSX_VERSION STREQUAL "10.4")
IF(_CURRENT_OSX_VERSION STREQUAL "10.3")
SET(CMAKE_OSX_SYSROOT_DEFAULT
"${_CMAKE_OSX_SDKS_DIR}/MacOSX10.3.9.sdk")
ENDIF(_CURRENT_OSX_VERSION STREQUAL "10.3")
# Use environment or default as initial cache value:
IF(NOT ENV_SDKROOT STREQUAL "")
SET(CMAKE_OSX_SYSROOT_VALUE ${ENV_SDKROOT})
ELSE(NOT ENV_SDKROOT STREQUAL "")
SET(CMAKE_OSX_SYSROOT_VALUE ${CMAKE_OSX_SYSROOT_DEFAULT})
ENDIF(NOT ENV_SDKROOT STREQUAL "")
# Set cache variable - end user may change this during ccmake or cmake-gui configure.
SET(CMAKE_OSX_SYSROOT ${CMAKE_OSX_SYSROOT_VALUE} CACHE PATH
"The product will be built against the headers and libraries located inside the indicated SDK.")
#----------------------------------------------------------------------------
function(SanityCheckSDKAndDeployTarget _sdk_path _deploy)
if(_deploy STREQUAL "")
return()
endif()
if(_sdk_path STREQUAL "")
message(FATAL_ERROR "CMAKE_OSX_DEPLOYMENT_TARGET='${_deploy}' but CMAKE_OSX_SYSROOT is empty... - either set CMAKE_OSX_SYSROOT to a valid SDK or set CMAKE_OSX_DEPLOYMENT_TARGET to empty")
endif()
string(REGEX REPLACE "(.*MacOSX*)(....)(.*\\.sdk)" "\\2" SDK "${_sdk_path}")
if(_deploy GREATER "${SDK}")
message(FATAL_ERROR "CMAKE_OSX_DEPLOYMENT_TARGET (${_deploy}) is greater than CMAKE_OSX_SYSROOT SDK (${_sdk_path}). Please set CMAKE_OSX_DEPLOYMENT_TARGET to ${SDK} or lower")
endif()
endfunction(SanityCheckSDKAndDeployTarget)
#----------------------------------------------------------------------------
# Make sure the combination of SDK and Deployment Target are allowed
SanityCheckSDKAndDeployTarget("${CMAKE_OSX_SYSROOT}" "${CMAKE_OSX_DEPLOYMENT_TARGET}")
# set _CMAKE_OSX_MACHINE to uname -m
EXECUTE_PROCESS(COMMAND uname -m
OUTPUT_STRIP_TRAILING_WHITESPACE
OUTPUT_VARIABLE _CMAKE_OSX_MACHINE)
# check for Power PC and change to ppc
IF(_CMAKE_OSX_MACHINE MATCHES "Power")
SET(_CMAKE_OSX_MACHINE ppc)
ENDIF(_CMAKE_OSX_MACHINE MATCHES "Power")
# check for environment variable CMAKE_OSX_ARCHITECTURES
# if it is set.
IF(NOT "$ENV{CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
SET(CMAKE_OSX_ARCHITECTURES_VALUE "$ENV{CMAKE_OSX_ARCHITECTURES}")
ELSE(NOT "$ENV{CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
SET(CMAKE_OSX_ARCHITECTURES_VALUE "")
ENDIF(NOT "$ENV{CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
# now put _CMAKE_OSX_MACHINE into the cache
SET(CMAKE_OSX_ARCHITECTURES ${CMAKE_OSX_ARCHITECTURES_VALUE} CACHE STRING
"Build architectures for OSX")
IF("${CMAKE_BACKWARDS_COMPATIBILITY}" MATCHES "^1\\.[0-6]$")
SET(CMAKE_SHARED_MODULE_CREATE_C_FLAGS
"${CMAKE_SHARED_MODULE_CREATE_C_FLAGS} -flat_namespace -undefined suppress")
ENDIF("${CMAKE_BACKWARDS_COMPATIBILITY}" MATCHES "^1\\.[0-6]$")
IF(NOT XCODE)
# Enable shared library versioning. This flag is not actually referenced
# but the fact that the setting exists will cause the generators to support
# soname computation.
SET(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-install_name")
ENDIF(NOT XCODE)
# Xcode does not support -isystem yet.
IF(XCODE)
SET(CMAKE_INCLUDE_SYSTEM_FLAG_C)
SET(CMAKE_INCLUDE_SYSTEM_FLAG_CXX)
ENDIF(XCODE)
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>")
# default to searching for frameworks first
SET(CMAKE_FIND_FRAMEWORK FIRST)
# set up the default search directories for frameworks
SET(CMAKE_SYSTEM_FRAMEWORK_PATH
~/Library/Frameworks
/Library/Frameworks
/Network/Library/Frameworks
/System/Library/Frameworks)
# default to searching for application bundles first
SET(CMAKE_FIND_APPBUNDLE FIRST)
# 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)
LIST(APPEND CMAKE_SYSTEM_PREFIX_PATH
/sw # Fink
/opt/local # MacPorts
)
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