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