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if(COMMAND cmake_policy)
cmake_policy(SET CMP0003 NEW)
cmake_policy(SET CMP0011 NEW)
endif(COMMAND cmake_policy)
include(use_ld64)
include(CMakeParseArguments)
include(dsym)
FUNCTION(add_darling_library name)
foreach(f IN LISTS ARGN)
set(files ${files} ${f})
endforeach(f)
set(CMAKE_SKIP_RPATH TRUE)
add_library(${name} SHARED ${files})
# Link using Apple's ld64
set_target_properties(${name} PROPERTIES
SUFFIX ".dylib"
NO_SONAME TRUE)
set_property(TARGET ${name} APPEND_STRING PROPERTY
LINK_FLAGS " ${CMAKE_SHARED_LINKER_FLAGS} -nostdlib")
if (DYLIB_INSTALL_NAME)
set_property(TARGET ${name} APPEND_STRING PROPERTY
LINK_FLAGS " -Wl,-dylib_install_name,${DYLIB_INSTALL_NAME} ")
endif (DYLIB_INSTALL_NAME)
if (DYLIB_COMPAT_VERSION)
set_property(TARGET ${name} APPEND_STRING PROPERTY
LINK_FLAGS " -Wl,-compatibility_version,${DYLIB_COMPAT_VERSION} ")
else (DYLIB_COMPAT_VERSION)
set_property(TARGET ${name} APPEND_STRING PROPERTY
LINK_FLAGS " -Wl,-compatibility_version,1.0.0 ")
endif (DYLIB_COMPAT_VERSION)
if (DYLIB_CURRENT_VERSION)
set_property(TARGET ${name} APPEND_STRING PROPERTY
LINK_FLAGS " -Wl,-current_version,${DYLIB_CURRENT_VERSION} ")
endif (DYLIB_CURRENT_VERSION)
use_ld64(${name})
if (NOT NO_DSYM)
dsym(${name})
endif (NOT NO_DSYM)
ENDFUNCTION(add_darling_library)
FUNCTION(make_fat)
set_property(TARGET ${ARGV} APPEND_STRING PROPERTY
LINK_FLAGS " -arch i386 -arch x86_64")
set_property(TARGET ${ARGV} APPEND_STRING PROPERTY
COMPILE_FLAGS " -B ${CMAKE_BINARY_DIR}/src/external/cctools-port/cctools/misc/ -arch i386 -arch x86_64")
foreach(tgt ${ARGV})
add_dependencies(${tgt} lipo)
endforeach(tgt)
ENDFUNCTION(make_fat)
# add_circular(name ...)
#
# Creates a shared library with circular/mutual dependencies on other libraries.
#
# Typical use: circular dependencies between libs in /usr/lib/system
#
# Parameters:
# * SOURCES: Sources to build the library from. This function will internally create an object library for them.
# * OBJECTS: Object libraries to build the library from. (Because we cannot add object libraries into object libraries.)
# * SIBLINGS: Which "circular" libraries we should link against in the final pass.
# All specified libs must also be built with this function!
# * STRONG_SIBLINGS: Which "circular" libraries we should link against in the 1st pass.
# Only use for special cases, e.g. if this library reexports from this strong siblibg
# and another sibling depends on this reexport's existence.
# * DEPENDENCIES: Which standard libraries we should link against.
# * LINK_FLAGS: Extra linker flags, e.g. an alias list
# * UPWARD: Add an upward dependency. This affects initialization order. The specified dependency will only be
# loaded and initialized after the current library is fully loaded. This is needed to break
# certain dependency issues, esp. if a libSystem sublibrary depends on a library that depends on libSystem
# and has initializers. dyld bails out unless this dependency is upward.
FUNCTION(add_circular name)
cmake_parse_arguments(CIRCULAR "FAT" "LINK_FLAGS" "SOURCES;OBJECTS;SIBLINGS;STRONG_SIBLINGS;DEPENDENCIES;UPWARD" ${ARGN})
#message(STATUS "${name} sources: ${CIRCULAR_SOURCES}")
#message(STATUS "${name} siblings ${CIRCULAR_SIBLINGS}")
#message(STATUS "${name} deps: ${CIRCULAR_DEPENDENCIES}")
set(all_objects "${CIRCULAR_OBJECTS}")
# First create an object library for all sources with the aim to avoid rebuild
if (CIRCULAR_SOURCES)
add_library("${name}_obj" OBJECT ${CIRCULAR_SOURCES})
if (CIRCULAR_FAT)
make_fat("${name}_obj")
endif (CIRCULAR_FAT)
set(all_objects "${all_objects};$<TARGET_OBJECTS:${name}_obj>")
endif (CIRCULAR_SOURCES)
# Then create a shared Darling library, while ignoring all dependencies and using flat namespace
add_darling_library("${name}_firstpass" SHARED ${all_objects})
set_property(TARGET "${name}_firstpass" APPEND_STRING PROPERTY LINK_FLAGS " ${CIRCULAR_LINK_FLAGS} -Wl,-flat_namespace -Wl,-undefined,suppress")
foreach(dep ${CIRCULAR_STRONG_SIBLINGS})
target_link_libraries("${name}_firstpass" PRIVATE "${dep}_firstpass")
endforeach(dep)
if (CIRCULAR_FAT)
make_fat("${name}_firstpass")
endif (CIRCULAR_FAT)
# Then build the final product while linking against firstpass libraries
add_darling_library(${name} SHARED ${all_objects})
foreach(dep ${CIRCULAR_SIBLINGS})
target_link_libraries("${name}" PRIVATE "${dep}_firstpass")
endforeach(dep)
foreach(dep ${CIRCULAR_UPWARD})
#get_property(lib_location TARGET ${dep} PROPERTY LOCATION_${CMAKE_BUILD_TYPE})
#set_property(TARGET "${name}" APPEND_STRING PROPERTY LINK_FLAGS " -Wl,-upward_library,${lib_location}")
target_link_libraries("${name}" PRIVATE -Wl,-upward_library,$<TARGET_FILE:${dep}_firstpass>)
add_dependencies("${name}" "${dep}_firstpass")
endforeach(dep)
get_property(dylib_files GLOBAL PROPERTY FIRSTPASS_MAP)
set_property(TARGET "${name}" APPEND_STRING PROPERTY LINK_FLAGS " ${CIRCULAR_LINK_FLAGS}")
target_link_libraries("${name}" PRIVATE ${CIRCULAR_DEPENDENCIES})
if (CIRCULAR_FAT)
make_fat(${name})
endif (CIRCULAR_FAT)
ENDFUNCTION(add_circular)
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