455 lines
18 KiB
CMake
455 lines
18 KiB
CMake
include(CMakeParseArguments)
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# On OS X SDKs can be installed anywhere on the base system and xcode-select can
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# set the default Xcode to use. This function finds the SDKs that are present in
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# the current Xcode.
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function(find_darwin_sdk_dir var sdk_name)
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set(DARWIN_${sdk_name}_CACHED_SYSROOT "" CACHE STRING "Darwin SDK path for SDK ${sdk_name}.")
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set(DARWIN_PREFER_PUBLIC_SDK OFF CACHE BOOL "Prefer Darwin public SDK, even when an internal SDK is present.")
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if(DARWIN_${sdk_name}_CACHED_SYSROOT)
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set(${var} ${DARWIN_${sdk_name}_CACHED_SYSROOT} PARENT_SCOPE)
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return()
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endif()
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if(NOT DARWIN_PREFER_PUBLIC_SDK)
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# Let's first try the internal SDK, otherwise use the public SDK.
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execute_process(
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COMMAND xcodebuild -version -sdk ${sdk_name}.internal Path
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RESULT_VARIABLE result_process
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OUTPUT_VARIABLE var_internal
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_FILE /dev/null
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)
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endif()
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if((NOT result_process EQUAL 0) OR "" STREQUAL "${var_internal}")
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execute_process(
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COMMAND xcodebuild -version -sdk ${sdk_name} Path
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RESULT_VARIABLE result_process
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OUTPUT_VARIABLE var_internal
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_FILE /dev/null
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)
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else()
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set(${var}_INTERNAL ${var_internal} PARENT_SCOPE)
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endif()
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if(result_process EQUAL 0)
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set(${var} ${var_internal} PARENT_SCOPE)
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endif()
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set(DARWIN_${sdk_name}_CACHED_SYSROOT ${var_internal} CACHE STRING "Darwin SDK path for SDK ${sdk_name}." FORCE)
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endfunction()
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# There isn't a clear mapping of what architectures are supported with a given
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# target platform, but ld's version output does list the architectures it can
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# link for.
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function(darwin_get_toolchain_supported_archs output_var)
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execute_process(
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COMMAND ld -v
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ERROR_VARIABLE LINKER_VERSION)
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string(REGEX MATCH "configured to support archs: ([^\n]+)"
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ARCHES_MATCHED "${LINKER_VERSION}")
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if(ARCHES_MATCHED)
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set(ARCHES "${CMAKE_MATCH_1}")
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message(STATUS "Got ld supported ARCHES: ${ARCHES}")
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string(REPLACE " " ";" ARCHES ${ARCHES})
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else()
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# If auto-detecting fails, fall back to a default set
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message(WARNING "Detecting supported architectures from 'ld -v' failed. Returning default set.")
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set(ARCHES "i386;x86_64;armv7;armv7s;arm64")
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endif()
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set(${output_var} ${ARCHES} PARENT_SCOPE)
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endfunction()
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# This function takes an OS and a list of architectures and identifies the
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# subset of the architectures list that the installed toolchain can target.
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function(darwin_test_archs os valid_archs)
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if(${valid_archs})
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message(STATUS "Using cached valid architectures for ${os}.")
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return()
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endif()
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set(archs ${ARGN})
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if(NOT TEST_COMPILE_ONLY)
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message(STATUS "Finding valid architectures for ${os}...")
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set(SIMPLE_C ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.c)
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file(WRITE ${SIMPLE_C} "#include <stdio.h>\nint main() { printf(__FILE__); return 0; }\n")
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set(os_linker_flags)
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foreach(flag ${DARWIN_${os}_LINK_FLAGS})
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set(os_linker_flags "${os_linker_flags} ${flag}")
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endforeach()
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endif()
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# The simple program will build for x86_64h on the simulator because it is
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# compatible with x86_64 libraries (mostly), but since x86_64h isn't actually
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# a valid or useful architecture for the iOS simulator we should drop it.
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if(${os} MATCHES "^(iossim|tvossim|watchossim)$")
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list(REMOVE_ITEM archs "x86_64h")
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endif()
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set(working_archs)
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foreach(arch ${archs})
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set(arch_linker_flags "-arch ${arch} ${os_linker_flags}")
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if(TEST_COMPILE_ONLY)
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try_compile_only(CAN_TARGET_${os}_${arch} -v -arch ${arch} ${DARWIN_${os}_CFLAGS})
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else()
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set(SAVED_CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS})
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${arch_linker_flags}")
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try_compile(CAN_TARGET_${os}_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_C}
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COMPILE_DEFINITIONS "-v -arch ${arch}" ${DARWIN_${os}_CFLAGS}
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OUTPUT_VARIABLE TEST_OUTPUT)
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set(CMAKE_EXE_LINKER_FLAGS ${SAVED_CMAKE_EXE_LINKER_FLAGS})
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endif()
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if(${CAN_TARGET_${os}_${arch}})
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list(APPEND working_archs ${arch})
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else()
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Testing compiler for supporting ${os}-${arch}:\n"
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"${TEST_OUTPUT}\n")
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endif()
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endforeach()
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set(${valid_archs} ${working_archs}
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CACHE STRING "List of valid architectures for platform ${os}.")
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endfunction()
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# This function checks the host cpusubtype to see if it is post-haswell. Haswell
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# and later machines can run x86_64h binaries. Haswell is cpusubtype 8.
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function(darwin_filter_host_archs input output)
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list_intersect(tmp_var DARWIN_osx_ARCHS ${input})
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execute_process(
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COMMAND sysctl hw.cpusubtype
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OUTPUT_VARIABLE SUBTYPE)
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string(REGEX MATCH "hw.cpusubtype: ([0-9]*)"
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SUBTYPE_MATCHED "${SUBTYPE}")
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set(HASWELL_SUPPORTED Off)
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if(SUBTYPE_MATCHED)
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if(${CMAKE_MATCH_1} GREATER 7)
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set(HASWELL_SUPPORTED On)
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endif()
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endif()
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if(NOT HASWELL_SUPPORTED)
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list(REMOVE_ITEM tmp_var x86_64h)
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endif()
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set(${output} ${tmp_var} PARENT_SCOPE)
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endfunction()
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# Read and process the exclude file into a list of symbols
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function(darwin_read_list_from_file output_var file)
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if(EXISTS ${file})
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file(READ ${file} EXCLUDES)
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string(REPLACE "\n" ";" EXCLUDES ${EXCLUDES})
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set(${output_var} ${EXCLUDES} PARENT_SCOPE)
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endif()
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endfunction()
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# this function takes an OS, architecture and minimum version and provides a
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# list of builtin functions to exclude
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function(darwin_find_excluded_builtins_list output_var)
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cmake_parse_arguments(LIB
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""
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"OS;ARCH;MIN_VERSION"
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""
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${ARGN})
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if(NOT LIB_OS OR NOT LIB_ARCH)
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message(FATAL_ERROR "Must specify OS and ARCH to darwin_find_excluded_builtins_list!")
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endif()
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darwin_read_list_from_file(${LIB_OS}_BUILTINS
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${DARWIN_EXCLUDE_DIR}/${LIB_OS}.txt)
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darwin_read_list_from_file(${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS
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${DARWIN_EXCLUDE_DIR}/${LIB_OS}-${LIB_ARCH}.txt)
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if(LIB_MIN_VERSION)
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file(GLOB builtin_lists ${DARWIN_EXCLUDE_DIR}/${LIB_OS}*-${LIB_ARCH}.txt)
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foreach(builtin_list ${builtin_lists})
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string(REGEX MATCH "${LIB_OS}([0-9\\.]*)-${LIB_ARCH}.txt" VERSION_MATCHED "${builtin_list}")
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if (VERSION_MATCHED AND NOT CMAKE_MATCH_1 VERSION_LESS LIB_MIN_VERSION)
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if(NOT smallest_version)
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set(smallest_version ${CMAKE_MATCH_1})
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elseif(CMAKE_MATCH_1 VERSION_LESS smallest_version)
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set(smallest_version ${CMAKE_MATCH_1})
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endif()
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endif()
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endforeach()
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if(smallest_version)
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darwin_read_list_from_file(${LIB_ARCH}_${LIB_OS}_BUILTINS
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${DARWIN_EXCLUDE_DIR}/${LIB_OS}${smallest_version}-${LIB_ARCH}.txt)
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endif()
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endif()
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set(${output_var}
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${${LIB_ARCH}_${LIB_OS}_BUILTINS}
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${${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS}
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${${LIB_OS}_BUILTINS} PARENT_SCOPE)
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endfunction()
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# adds a single builtin library for a single OS & ARCH
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macro(darwin_add_builtin_library name suffix)
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cmake_parse_arguments(LIB
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""
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"PARENT_TARGET;OS;ARCH"
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"SOURCES;CFLAGS;DEFS"
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${ARGN})
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set(libname "${name}.${suffix}_${LIB_ARCH}_${LIB_OS}")
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add_library(${libname} STATIC ${LIB_SOURCES})
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if(DARWIN_${LIB_OS}_SYSROOT)
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set(sysroot_flag -isysroot ${DARWIN_${LIB_OS}_SYSROOT})
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endif()
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set_target_compile_flags(${libname}
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${sysroot_flag}
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${DARWIN_${LIB_OS}_BUILTIN_MIN_VER_FLAG}
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${LIB_CFLAGS})
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set_property(TARGET ${libname} APPEND PROPERTY
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COMPILE_DEFINITIONS ${LIB_DEFS})
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set_target_properties(${libname} PROPERTIES
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OUTPUT_NAME ${libname}${COMPILER_RT_OS_SUFFIX})
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set_target_properties(${libname} PROPERTIES
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OSX_ARCHITECTURES ${LIB_ARCH})
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if(LIB_PARENT_TARGET)
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add_dependencies(${LIB_PARENT_TARGET} ${libname})
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endif()
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list(APPEND ${LIB_OS}_${suffix}_libs ${libname})
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list(APPEND ${LIB_OS}_${suffix}_lipo_flags -arch ${arch} $<TARGET_FILE:${libname}>)
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endmacro()
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function(darwin_lipo_libs name)
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cmake_parse_arguments(LIB
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""
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"PARENT_TARGET;OUTPUT_DIR;INSTALL_DIR"
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"LIPO_FLAGS;DEPENDS"
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${ARGN})
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if(LIB_DEPENDS AND LIB_LIPO_FLAGS)
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add_custom_command(OUTPUT ${LIB_OUTPUT_DIR}/lib${name}.a
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COMMAND ${CMAKE_COMMAND} -E make_directory ${LIB_OUTPUT_DIR}
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COMMAND lipo -output
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${LIB_OUTPUT_DIR}/lib${name}.a
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-create ${LIB_LIPO_FLAGS}
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DEPENDS ${LIB_DEPENDS}
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)
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add_custom_target(${name}
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DEPENDS ${LIB_OUTPUT_DIR}/lib${name}.a)
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add_dependencies(${LIB_PARENT_TARGET} ${name})
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install(FILES ${LIB_OUTPUT_DIR}/lib${name}.a
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DESTINATION ${LIB_INSTALL_DIR})
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else()
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message(WARNING "Not generating lipo target for ${name} because no input libraries exist.")
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endif()
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endfunction()
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# Filter out generic versions of routines that are re-implemented in
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# architecture specific manner. This prevents multiple definitions of the
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# same symbols, making the symbol selection non-deterministic.
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function(darwin_filter_builtin_sources output_var exclude_or_include excluded_list)
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if(exclude_or_include STREQUAL "EXCLUDE")
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set(filter_action GREATER)
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set(filter_value -1)
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elseif(exclude_or_include STREQUAL "INCLUDE")
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set(filter_action LESS)
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set(filter_value 0)
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else()
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message(FATAL_ERROR "darwin_filter_builtin_sources called without EXCLUDE|INCLUDE")
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endif()
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set(intermediate ${ARGN})
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foreach (_file ${intermediate})
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get_filename_component(_name_we ${_file} NAME_WE)
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list(FIND ${excluded_list} ${_name_we} _found)
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if(_found ${filter_action} ${filter_value})
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list(REMOVE_ITEM intermediate ${_file})
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elseif(${_file} MATCHES ".*/.*\\.S" OR ${_file} MATCHES ".*/.*\\.c")
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get_filename_component(_name ${_file} NAME)
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string(REPLACE ".S" ".c" _cname "${_name}")
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list(REMOVE_ITEM intermediate ${_cname})
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endif ()
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endforeach ()
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set(${output_var} ${intermediate} PARENT_SCOPE)
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endfunction()
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# Generates builtin libraries for all operating systems specified in ARGN. Each
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# OS library is constructed by lipo-ing together single-architecture libraries.
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macro(darwin_add_builtin_libraries)
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set(DARWIN_EXCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Darwin-excludes)
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set(CFLAGS "-fPIC -O3 -fvisibility=hidden -DVISIBILITY_HIDDEN -Wall -fomit-frame-pointer")
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set(CMAKE_C_FLAGS "")
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set(CMAKE_CXX_FLAGS "")
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set(CMAKE_ASM_FLAGS "")
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set(PROFILE_SOURCES ../profile/InstrProfiling
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../profile/InstrProfilingBuffer
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../profile/InstrProfilingPlatformDarwin
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../profile/InstrProfilingWriter)
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foreach (os ${ARGN})
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list_intersect(DARWIN_BUILTIN_ARCHS DARWIN_${os}_ARCHS BUILTIN_SUPPORTED_ARCH)
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foreach (arch ${DARWIN_BUILTIN_ARCHS})
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darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS
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OS ${os}
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ARCH ${arch}
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MIN_VERSION ${DARWIN_${os}_BUILTIN_MIN_VER})
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darwin_filter_builtin_sources(filtered_sources
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EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS
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${${arch}_SOURCES})
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darwin_add_builtin_library(clang_rt builtins
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OS ${os}
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ARCH ${arch}
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SOURCES ${filtered_sources}
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CFLAGS ${CFLAGS} -arch ${arch}
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PARENT_TARGET builtins)
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endforeach()
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# Don't build cc_kext libraries for simulator platforms
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if(NOT DARWIN_${os}_SKIP_CC_KEXT)
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foreach (arch ${DARWIN_BUILTIN_ARCHS})
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# By not specifying MIN_VERSION this only reads the OS and OS-arch lists.
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# We don't want to filter out the builtins that are present in libSystem
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# because kexts can't link libSystem.
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darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS
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OS ${os}
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ARCH ${arch})
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darwin_filter_builtin_sources(filtered_sources
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EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS
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${${arch}_SOURCES})
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# In addition to the builtins cc_kext includes some profile sources
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darwin_add_builtin_library(clang_rt cc_kext
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OS ${os}
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ARCH ${arch}
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SOURCES ${filtered_sources} ${PROFILE_SOURCES}
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CFLAGS ${CFLAGS} -arch ${arch} -mkernel
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DEFS KERNEL_USE
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PARENT_TARGET builtins)
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endforeach()
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set(archive_name clang_rt.cc_kext_${os})
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if(${os} STREQUAL "osx")
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set(archive_name clang_rt.cc_kext)
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endif()
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darwin_lipo_libs(${archive_name}
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PARENT_TARGET builtins
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LIPO_FLAGS ${${os}_cc_kext_lipo_flags}
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DEPENDS ${${os}_cc_kext_libs}
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OUTPUT_DIR ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
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INSTALL_DIR ${COMPILER_RT_LIBRARY_INSTALL_DIR})
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endif()
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endforeach()
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# We put the x86 sim slices into the archives for their base OS
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foreach (os ${ARGN})
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if(NOT ${os} MATCHES ".*sim$")
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darwin_lipo_libs(clang_rt.${os}
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PARENT_TARGET builtins
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LIPO_FLAGS ${${os}_builtins_lipo_flags} ${${os}sim_builtins_lipo_flags}
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DEPENDS ${${os}_builtins_libs} ${${os}sim_builtins_libs}
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OUTPUT_DIR ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
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INSTALL_DIR ${COMPILER_RT_LIBRARY_INSTALL_DIR})
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endif()
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endforeach()
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darwin_add_embedded_builtin_libraries()
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endmacro()
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macro(darwin_add_embedded_builtin_libraries)
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# this is a hacky opt-out. If you can't target both intel and arm
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# architectures we bail here.
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set(DARWIN_SOFT_FLOAT_ARCHS armv6m armv7m armv7em armv7)
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set(DARWIN_HARD_FLOAT_ARCHS armv7em armv7)
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if(COMPILER_RT_SUPPORTED_ARCH MATCHES ".*armv.*")
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list(FIND COMPILER_RT_SUPPORTED_ARCH i386 i386_idx)
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if(i386_idx GREATER -1)
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list(APPEND DARWIN_HARD_FLOAT_ARCHS i386)
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endif()
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list(FIND COMPILER_RT_SUPPORTED_ARCH x86_64 x86_64_idx)
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if(x86_64_idx GREATER -1)
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list(APPEND DARWIN_HARD_FLOAT_ARCHS x86_64)
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endif()
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set(MACHO_SYM_DIR ${CMAKE_CURRENT_SOURCE_DIR}/macho_embedded)
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set(CFLAGS "-Oz -Wall -fomit-frame-pointer -ffreestanding")
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set(CMAKE_C_FLAGS "")
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set(CMAKE_CXX_FLAGS "")
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set(CMAKE_ASM_FLAGS "")
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set(SOFT_FLOAT_FLAG -mfloat-abi=soft)
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set(HARD_FLOAT_FLAG -mfloat-abi=hard)
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set(ENABLE_PIC Off)
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set(PIC_FLAG -fPIC)
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set(STATIC_FLAG -static)
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set(DARWIN_macho_embedded_ARCHS armv6m armv7m armv7em armv7 i386 x86_64)
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set(DARWIN_macho_embedded_LIBRARY_OUTPUT_DIR
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${COMPILER_RT_OUTPUT_DIR}/lib/macho_embedded)
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set(DARWIN_macho_embedded_LIBRARY_INSTALL_DIR
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${COMPILER_RT_INSTALL_PATH}/lib/macho_embedded)
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set(CFLAGS_armv7 "-target thumbv7-apple-darwin-eabi")
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set(CFLAGS_i386 "-march=pentium")
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darwin_read_list_from_file(common_FUNCTIONS ${MACHO_SYM_DIR}/common.txt)
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darwin_read_list_from_file(thumb2_FUNCTIONS ${MACHO_SYM_DIR}/thumb2.txt)
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darwin_read_list_from_file(thumb2_64_FUNCTIONS ${MACHO_SYM_DIR}/thumb2-64.txt)
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darwin_read_list_from_file(arm_FUNCTIONS ${MACHO_SYM_DIR}/arm.txt)
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darwin_read_list_from_file(i386_FUNCTIONS ${MACHO_SYM_DIR}/i386.txt)
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set(armv6m_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS})
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set(armv7m_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS})
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set(armv7em_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS})
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set(armv7_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS} ${thumb2_64_FUNCTIONS})
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set(i386_FUNCTIONS ${common_FUNCTIONS} ${i386_FUNCTIONS})
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set(x86_64_FUNCTIONS ${common_FUNCTIONS})
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foreach(arch ${DARWIN_macho_embedded_ARCHS})
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darwin_filter_builtin_sources(${arch}_filtered_sources
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INCLUDE ${arch}_FUNCTIONS
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${${arch}_SOURCES})
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if(NOT ${arch}_filtered_sources)
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message("${arch}_SOURCES: ${${arch}_SOURCES}")
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message("${arch}_FUNCTIONS: ${${arch}_FUNCTIONS}")
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message(FATAL_ERROR "Empty filtered sources!")
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endif()
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endforeach()
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foreach(float_type SOFT HARD)
|
|
foreach(type PIC STATIC)
|
|
string(TOLOWER "${float_type}_${type}" lib_suffix)
|
|
foreach(arch ${DARWIN_${float_type}_FLOAT_ARCHS})
|
|
set(DARWIN_macho_embedded_SYSROOT ${DARWIN_osx_SYSROOT})
|
|
set(float_flag)
|
|
if(${arch} MATCHES "^arm")
|
|
# x86 targets are hard float by default, but the complain about the
|
|
# float ABI flag, so don't pass it unless we're targeting arm.
|
|
set(float_flag ${${float_type}_FLOAT_FLAG})
|
|
endif()
|
|
darwin_add_builtin_library(clang_rt ${lib_suffix}
|
|
OS macho_embedded
|
|
ARCH ${arch}
|
|
SOURCES ${${arch}_filtered_sources}
|
|
CFLAGS ${CFLAGS} -arch ${arch} ${${type}_FLAG} ${float_flag} ${CFLAGS_${arch}}
|
|
PARENT_TARGET builtins)
|
|
endforeach()
|
|
foreach(lib ${macho_embedded_${lib_suffix}_libs})
|
|
set_target_properties(${lib} PROPERTIES LINKER_LANGUAGE C)
|
|
endforeach()
|
|
darwin_lipo_libs(clang_rt.${lib_suffix}
|
|
PARENT_TARGET builtins
|
|
LIPO_FLAGS ${macho_embedded_${lib_suffix}_lipo_flags}
|
|
DEPENDS ${macho_embedded_${lib_suffix}_libs}
|
|
OUTPUT_DIR ${DARWIN_macho_embedded_LIBRARY_OUTPUT_DIR}
|
|
INSTALL_DIR ${DARWIN_macho_embedded_LIBRARY_INSTALL_DIR})
|
|
endforeach()
|
|
endforeach()
|
|
endif()
|
|
endmacro()
|