1include(CMakeParseArguments) 2include(CompilerRTUtils) 3 4# On OS X SDKs can be installed anywhere on the base system and xcode-select can 5# set the default Xcode to use. This function finds the SDKs that are present in 6# the current Xcode. 7function(find_darwin_sdk_dir var sdk_name) 8 set(DARWIN_${sdk_name}_CACHED_SYSROOT "" CACHE STRING "Darwin SDK path for SDK ${sdk_name}.") 9 set(DARWIN_PREFER_PUBLIC_SDK OFF CACHE BOOL "Prefer Darwin public SDK, even when an internal SDK is present.") 10 11 if(DARWIN_${sdk_name}_CACHED_SYSROOT) 12 set(${var} ${DARWIN_${sdk_name}_CACHED_SYSROOT} PARENT_SCOPE) 13 return() 14 endif() 15 if(NOT DARWIN_PREFER_PUBLIC_SDK) 16 # Let's first try the internal SDK, otherwise use the public SDK. 17 execute_process( 18 COMMAND xcodebuild -version -sdk ${sdk_name}.internal Path 19 RESULT_VARIABLE result_process 20 OUTPUT_VARIABLE var_internal 21 OUTPUT_STRIP_TRAILING_WHITESPACE 22 ERROR_FILE /dev/null 23 ) 24 endif() 25 if((NOT result_process EQUAL 0) OR "" STREQUAL "${var_internal}") 26 execute_process( 27 COMMAND xcodebuild -version -sdk ${sdk_name} Path 28 RESULT_VARIABLE result_process 29 OUTPUT_VARIABLE var_internal 30 OUTPUT_STRIP_TRAILING_WHITESPACE 31 ERROR_FILE /dev/null 32 ) 33 else() 34 set(${var}_INTERNAL ${var_internal} PARENT_SCOPE) 35 endif() 36 if(result_process EQUAL 0) 37 set(${var} ${var_internal} PARENT_SCOPE) 38 endif() 39 set(DARWIN_${sdk_name}_CACHED_SYSROOT ${var_internal} CACHE STRING "Darwin SDK path for SDK ${sdk_name}." FORCE) 40endfunction() 41 42# There isn't a clear mapping of what architectures are supported with a given 43# target platform, but ld's version output does list the architectures it can 44# link for. 45function(darwin_get_toolchain_supported_archs output_var) 46 execute_process( 47 COMMAND "${CMAKE_LINKER}" -v 48 ERROR_VARIABLE LINKER_VERSION) 49 50 string(REGEX MATCH "configured to support archs: ([^\n]+)" 51 ARCHES_MATCHED "${LINKER_VERSION}") 52 if(ARCHES_MATCHED) 53 set(ARCHES "${CMAKE_MATCH_1}") 54 message(STATUS "Got ld supported ARCHES: ${ARCHES}") 55 string(REPLACE " " ";" ARCHES ${ARCHES}) 56 else() 57 # If auto-detecting fails, fall back to a default set 58 message(WARNING "Detecting supported architectures from 'ld -v' failed. Returning default set.") 59 set(ARCHES "i386;x86_64;armv7;armv7s;arm64") 60 endif() 61 62 set(${output_var} ${ARCHES} PARENT_SCOPE) 63endfunction() 64 65# This function takes an OS and a list of architectures and identifies the 66# subset of the architectures list that the installed toolchain can target. 67function(darwin_test_archs os valid_archs) 68 if(${valid_archs}) 69 message(STATUS "Using cached valid architectures for ${os}.") 70 return() 71 endif() 72 73 set(archs ${ARGN}) 74 if(NOT TEST_COMPILE_ONLY) 75 message(STATUS "Finding valid architectures for ${os}...") 76 set(SIMPLE_C ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.c) 77 file(WRITE ${SIMPLE_C} "#include <stdio.h>\nint main() { printf(__FILE__); return 0; }\n") 78 79 set(os_linker_flags) 80 foreach(flag ${DARWIN_${os}_LINK_FLAGS}) 81 set(os_linker_flags "${os_linker_flags} ${flag}") 82 endforeach() 83 endif() 84 85 # The simple program will build for x86_64h on the simulator because it is 86 # compatible with x86_64 libraries (mostly), but since x86_64h isn't actually 87 # a valid or useful architecture for the iOS simulator we should drop it. 88 if(${os} MATCHES "^(iossim|tvossim|watchossim)$") 89 list(REMOVE_ITEM archs "x86_64h") 90 endif() 91 92 set(working_archs) 93 foreach(arch ${archs}) 94 95 set(arch_linker_flags "-arch ${arch} ${os_linker_flags}") 96 if(TEST_COMPILE_ONLY) 97 try_compile_only(CAN_TARGET_${os}_${arch} FLAGS -v -arch ${arch} ${DARWIN_${os}_CFLAGS}) 98 else() 99 set(SAVED_CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS}) 100 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${arch_linker_flags}") 101 try_compile(CAN_TARGET_${os}_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_C} 102 COMPILE_DEFINITIONS "-v -arch ${arch}" ${DARWIN_${os}_CFLAGS} 103 OUTPUT_VARIABLE TEST_OUTPUT) 104 set(CMAKE_EXE_LINKER_FLAGS ${SAVED_CMAKE_EXE_LINKER_FLAGS}) 105 endif() 106 if(${CAN_TARGET_${os}_${arch}}) 107 list(APPEND working_archs ${arch}) 108 else() 109 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 110 "Testing compiler for supporting ${os}-${arch}:\n" 111 "${TEST_OUTPUT}\n") 112 endif() 113 endforeach() 114 set(${valid_archs} ${working_archs} 115 CACHE STRING "List of valid architectures for platform ${os}.") 116endfunction() 117 118# This function checks the host cpusubtype to see if it is post-haswell. Haswell 119# and later machines can run x86_64h binaries. Haswell is cpusubtype 8. 120function(darwin_filter_host_archs input output) 121 list_intersect(tmp_var DARWIN_osx_ARCHS ${input}) 122 execute_process( 123 COMMAND sysctl hw.cpusubtype 124 OUTPUT_VARIABLE SUBTYPE) 125 126 string(REGEX MATCH "hw.cpusubtype: ([0-9]*)" 127 SUBTYPE_MATCHED "${SUBTYPE}") 128 set(HASWELL_SUPPORTED Off) 129 if(SUBTYPE_MATCHED) 130 if(${CMAKE_MATCH_1} GREATER 7) 131 set(HASWELL_SUPPORTED On) 132 endif() 133 endif() 134 if(NOT HASWELL_SUPPORTED) 135 list(REMOVE_ITEM tmp_var x86_64h) 136 endif() 137 set(${output} ${tmp_var} PARENT_SCOPE) 138endfunction() 139 140# Read and process the exclude file into a list of symbols 141function(darwin_read_list_from_file output_var file) 142 if(EXISTS ${file}) 143 file(READ ${file} EXCLUDES) 144 string(REPLACE "\n" ";" EXCLUDES ${EXCLUDES}) 145 set(${output_var} ${EXCLUDES} PARENT_SCOPE) 146 endif() 147endfunction() 148 149# this function takes an OS, architecture and minimum version and provides a 150# list of builtin functions to exclude 151function(darwin_find_excluded_builtins_list output_var) 152 cmake_parse_arguments(LIB 153 "" 154 "OS;ARCH;MIN_VERSION" 155 "" 156 ${ARGN}) 157 158 if(NOT LIB_OS OR NOT LIB_ARCH) 159 message(FATAL_ERROR "Must specify OS and ARCH to darwin_find_excluded_builtins_list!") 160 endif() 161 162 darwin_read_list_from_file(${LIB_OS}_BUILTINS 163 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}.txt) 164 darwin_read_list_from_file(${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS 165 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}-${LIB_ARCH}.txt) 166 167 if(LIB_MIN_VERSION) 168 file(GLOB builtin_lists ${DARWIN_EXCLUDE_DIR}/${LIB_OS}*-${LIB_ARCH}.txt) 169 foreach(builtin_list ${builtin_lists}) 170 string(REGEX MATCH "${LIB_OS}([0-9\\.]*)-${LIB_ARCH}.txt" VERSION_MATCHED "${builtin_list}") 171 if (VERSION_MATCHED AND NOT CMAKE_MATCH_1 VERSION_LESS LIB_MIN_VERSION) 172 if(NOT smallest_version) 173 set(smallest_version ${CMAKE_MATCH_1}) 174 elseif(CMAKE_MATCH_1 VERSION_LESS smallest_version) 175 set(smallest_version ${CMAKE_MATCH_1}) 176 endif() 177 endif() 178 endforeach() 179 180 if(smallest_version) 181 darwin_read_list_from_file(${LIB_ARCH}_${LIB_OS}_BUILTINS 182 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}${smallest_version}-${LIB_ARCH}.txt) 183 endif() 184 endif() 185 186 set(${output_var} 187 ${${LIB_ARCH}_${LIB_OS}_BUILTINS} 188 ${${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS} 189 ${${LIB_OS}_BUILTINS} PARENT_SCOPE) 190endfunction() 191 192# adds a single builtin library for a single OS & ARCH 193macro(darwin_add_builtin_library name suffix) 194 cmake_parse_arguments(LIB 195 "" 196 "PARENT_TARGET;OS;ARCH" 197 "SOURCES;CFLAGS;DEFS" 198 ${ARGN}) 199 set(libname "${name}.${suffix}_${LIB_ARCH}_${LIB_OS}") 200 add_library(${libname} STATIC ${LIB_SOURCES}) 201 if(DARWIN_${LIB_OS}_SYSROOT) 202 set(sysroot_flag -isysroot ${DARWIN_${LIB_OS}_SYSROOT}) 203 endif() 204 205 # Make a copy of the compilation flags. 206 set(builtin_cflags ${LIB_CFLAGS}) 207 208 # Strip out any inappropriate flags for the target. 209 if("${LIB_ARCH}" MATCHES "^(armv7|armv7k|armv7s)$") 210 set(builtin_cflags "") 211 foreach(cflag "${LIB_CFLAGS}") 212 string(REPLACE "-fomit-frame-pointer" "" cflag "${cflag}") 213 list(APPEND builtin_cflags ${cflag}) 214 endforeach(cflag) 215 endif() 216 217 set_target_compile_flags(${libname} 218 ${sysroot_flag} 219 ${DARWIN_${LIB_OS}_BUILTIN_MIN_VER_FLAG} 220 ${builtin_cflags}) 221 set_property(TARGET ${libname} APPEND PROPERTY 222 COMPILE_DEFINITIONS ${LIB_DEFS}) 223 set_target_properties(${libname} PROPERTIES 224 OUTPUT_NAME ${libname}${COMPILER_RT_OS_SUFFIX}) 225 set_target_properties(${libname} PROPERTIES 226 OSX_ARCHITECTURES ${LIB_ARCH}) 227 228 if(LIB_PARENT_TARGET) 229 add_dependencies(${LIB_PARENT_TARGET} ${libname}) 230 endif() 231 232 list(APPEND ${LIB_OS}_${suffix}_libs ${libname}) 233 list(APPEND ${LIB_OS}_${suffix}_lipo_flags -arch ${arch} $<TARGET_FILE:${libname}>) 234 set_target_properties(${libname} PROPERTIES FOLDER "Compiler-RT Libraries") 235endmacro() 236 237function(darwin_lipo_libs name) 238 cmake_parse_arguments(LIB 239 "" 240 "PARENT_TARGET;OUTPUT_DIR;INSTALL_DIR" 241 "LIPO_FLAGS;DEPENDS" 242 ${ARGN}) 243 if(LIB_DEPENDS AND LIB_LIPO_FLAGS) 244 add_custom_command(OUTPUT ${LIB_OUTPUT_DIR}/lib${name}.a 245 COMMAND ${CMAKE_COMMAND} -E make_directory ${LIB_OUTPUT_DIR} 246 COMMAND lipo -output 247 ${LIB_OUTPUT_DIR}/lib${name}.a 248 -create ${LIB_LIPO_FLAGS} 249 DEPENDS ${LIB_DEPENDS} 250 ) 251 add_custom_target(${name} 252 DEPENDS ${LIB_OUTPUT_DIR}/lib${name}.a) 253 set_target_properties(${name} PROPERTIES FOLDER "Compiler-RT Misc") 254 add_dependencies(${LIB_PARENT_TARGET} ${name}) 255 256 if(CMAKE_CONFIGURATION_TYPES) 257 set(install_component ${LIB_PARENT_TARGET}) 258 else() 259 set(install_component ${name}) 260 endif() 261 install(FILES ${LIB_OUTPUT_DIR}/lib${name}.a 262 DESTINATION ${LIB_INSTALL_DIR} 263 COMPONENT ${install_component}) 264 add_compiler_rt_install_targets(${name} PARENT_TARGET ${LIB_PARENT_TARGET}) 265 else() 266 message(WARNING "Not generating lipo target for ${name} because no input libraries exist.") 267 endif() 268endfunction() 269 270# Generates builtin libraries for all operating systems specified in ARGN. Each 271# OS library is constructed by lipo-ing together single-architecture libraries. 272macro(darwin_add_builtin_libraries) 273 set(DARWIN_EXCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Darwin-excludes) 274 275 set(CFLAGS "-fPIC -O3 -fvisibility=hidden -DVISIBILITY_HIDDEN -Wall -fomit-frame-pointer") 276 set(CMAKE_C_FLAGS "") 277 set(CMAKE_CXX_FLAGS "") 278 set(CMAKE_ASM_FLAGS "") 279 280 set(PROFILE_SOURCES ../profile/InstrProfiling 281 ../profile/InstrProfilingBuffer 282 ../profile/InstrProfilingPlatformDarwin 283 ../profile/InstrProfilingWriter) 284 foreach (os ${ARGN}) 285 list_intersect(DARWIN_BUILTIN_ARCHS DARWIN_${os}_ARCHS BUILTIN_SUPPORTED_ARCH) 286 foreach (arch ${DARWIN_BUILTIN_ARCHS}) 287 darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS 288 OS ${os} 289 ARCH ${arch} 290 MIN_VERSION ${DARWIN_${os}_BUILTIN_MIN_VER}) 291 292 filter_builtin_sources(filtered_sources 293 EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS 294 ${${arch}_SOURCES}) 295 296 darwin_add_builtin_library(clang_rt builtins 297 OS ${os} 298 ARCH ${arch} 299 SOURCES ${filtered_sources} 300 CFLAGS ${CFLAGS} -arch ${arch} 301 PARENT_TARGET builtins) 302 endforeach() 303 304 # Don't build cc_kext libraries for simulator platforms 305 if(NOT DARWIN_${os}_SKIP_CC_KEXT) 306 foreach (arch ${DARWIN_BUILTIN_ARCHS}) 307 # By not specifying MIN_VERSION this only reads the OS and OS-arch lists. 308 # We don't want to filter out the builtins that are present in libSystem 309 # because kexts can't link libSystem. 310 darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS 311 OS ${os} 312 ARCH ${arch}) 313 314 filter_builtin_sources(filtered_sources 315 EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS 316 ${${arch}_SOURCES}) 317 318 # In addition to the builtins cc_kext includes some profile sources 319 darwin_add_builtin_library(clang_rt cc_kext 320 OS ${os} 321 ARCH ${arch} 322 SOURCES ${filtered_sources} ${PROFILE_SOURCES} 323 CFLAGS ${CFLAGS} -arch ${arch} -mkernel 324 DEFS KERNEL_USE 325 PARENT_TARGET builtins) 326 endforeach() 327 set(archive_name clang_rt.cc_kext_${os}) 328 if(${os} STREQUAL "osx") 329 set(archive_name clang_rt.cc_kext) 330 endif() 331 darwin_lipo_libs(${archive_name} 332 PARENT_TARGET builtins 333 LIPO_FLAGS ${${os}_cc_kext_lipo_flags} 334 DEPENDS ${${os}_cc_kext_libs} 335 OUTPUT_DIR ${COMPILER_RT_LIBRARY_OUTPUT_DIR} 336 INSTALL_DIR ${COMPILER_RT_LIBRARY_INSTALL_DIR}) 337 endif() 338 endforeach() 339 340 # We put the x86 sim slices into the archives for their base OS 341 foreach (os ${ARGN}) 342 if(NOT ${os} MATCHES ".*sim$") 343 darwin_lipo_libs(clang_rt.${os} 344 PARENT_TARGET builtins 345 LIPO_FLAGS ${${os}_builtins_lipo_flags} ${${os}sim_builtins_lipo_flags} 346 DEPENDS ${${os}_builtins_libs} ${${os}sim_builtins_libs} 347 OUTPUT_DIR ${COMPILER_RT_LIBRARY_OUTPUT_DIR} 348 INSTALL_DIR ${COMPILER_RT_LIBRARY_INSTALL_DIR}) 349 endif() 350 endforeach() 351 darwin_add_embedded_builtin_libraries() 352endmacro() 353 354macro(darwin_add_embedded_builtin_libraries) 355 # this is a hacky opt-out. If you can't target both intel and arm 356 # architectures we bail here. 357 set(DARWIN_SOFT_FLOAT_ARCHS armv6m armv7m armv7em armv7) 358 set(DARWIN_HARD_FLOAT_ARCHS armv7em armv7) 359 if(COMPILER_RT_SUPPORTED_ARCH MATCHES ".*armv.*") 360 list(FIND COMPILER_RT_SUPPORTED_ARCH i386 i386_idx) 361 if(i386_idx GREATER -1) 362 list(APPEND DARWIN_HARD_FLOAT_ARCHS i386) 363 endif() 364 365 list(FIND COMPILER_RT_SUPPORTED_ARCH x86_64 x86_64_idx) 366 if(x86_64_idx GREATER -1) 367 list(APPEND DARWIN_HARD_FLOAT_ARCHS x86_64) 368 endif() 369 370 set(MACHO_SYM_DIR ${CMAKE_CURRENT_SOURCE_DIR}/macho_embedded) 371 372 set(CFLAGS "-Oz -Wall -fomit-frame-pointer -ffreestanding") 373 set(CMAKE_C_FLAGS "") 374 set(CMAKE_CXX_FLAGS "") 375 set(CMAKE_ASM_FLAGS "") 376 377 set(SOFT_FLOAT_FLAG -mfloat-abi=soft) 378 set(HARD_FLOAT_FLAG -mfloat-abi=hard) 379 380 set(ENABLE_PIC Off) 381 set(PIC_FLAG -fPIC) 382 set(STATIC_FLAG -static) 383 384 set(DARWIN_macho_embedded_ARCHS armv6m armv7m armv7em armv7 i386 x86_64) 385 386 set(DARWIN_macho_embedded_LIBRARY_OUTPUT_DIR 387 ${COMPILER_RT_OUTPUT_DIR}/lib/macho_embedded) 388 set(DARWIN_macho_embedded_LIBRARY_INSTALL_DIR 389 ${COMPILER_RT_INSTALL_PATH}/lib/macho_embedded) 390 391 set(CFLAGS_armv7 "-target thumbv7-apple-darwin-eabi") 392 set(CFLAGS_i386 "-march=pentium") 393 394 darwin_read_list_from_file(common_FUNCTIONS ${MACHO_SYM_DIR}/common.txt) 395 darwin_read_list_from_file(thumb2_FUNCTIONS ${MACHO_SYM_DIR}/thumb2.txt) 396 darwin_read_list_from_file(thumb2_64_FUNCTIONS ${MACHO_SYM_DIR}/thumb2-64.txt) 397 darwin_read_list_from_file(arm_FUNCTIONS ${MACHO_SYM_DIR}/arm.txt) 398 darwin_read_list_from_file(i386_FUNCTIONS ${MACHO_SYM_DIR}/i386.txt) 399 400 401 set(armv6m_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS}) 402 set(armv7m_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS}) 403 set(armv7em_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS}) 404 set(armv7_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS} ${thumb2_64_FUNCTIONS}) 405 set(i386_FUNCTIONS ${common_FUNCTIONS} ${i386_FUNCTIONS}) 406 set(x86_64_FUNCTIONS ${common_FUNCTIONS}) 407 408 foreach(arch ${DARWIN_macho_embedded_ARCHS}) 409 filter_builtin_sources(${arch}_filtered_sources 410 INCLUDE ${arch}_FUNCTIONS 411 ${${arch}_SOURCES}) 412 if(NOT ${arch}_filtered_sources) 413 message(WARNING "${arch}_SOURCES: ${${arch}_SOURCES}") 414 message(WARNING "${arch}_FUNCTIONS: ${${arch}_FUNCTIONS}") 415 message(FATAL_ERROR "Empty filtered sources!") 416 endif() 417 endforeach() 418 419 foreach(float_type SOFT HARD) 420 foreach(type PIC STATIC) 421 string(TOLOWER "${float_type}_${type}" lib_suffix) 422 foreach(arch ${DARWIN_${float_type}_FLOAT_ARCHS}) 423 set(DARWIN_macho_embedded_SYSROOT ${DARWIN_osx_SYSROOT}) 424 set(float_flag) 425 if(${arch} MATCHES "^arm") 426 # x86 targets are hard float by default, but the complain about the 427 # float ABI flag, so don't pass it unless we're targeting arm. 428 set(float_flag ${${float_type}_FLOAT_FLAG}) 429 endif() 430 darwin_add_builtin_library(clang_rt ${lib_suffix} 431 OS macho_embedded 432 ARCH ${arch} 433 SOURCES ${${arch}_filtered_sources} 434 CFLAGS ${CFLAGS} -arch ${arch} ${${type}_FLAG} ${float_flag} ${CFLAGS_${arch}} 435 PARENT_TARGET builtins) 436 endforeach() 437 foreach(lib ${macho_embedded_${lib_suffix}_libs}) 438 set_target_properties(${lib} PROPERTIES LINKER_LANGUAGE C) 439 endforeach() 440 darwin_lipo_libs(clang_rt.${lib_suffix} 441 PARENT_TARGET builtins 442 LIPO_FLAGS ${macho_embedded_${lib_suffix}_lipo_flags} 443 DEPENDS ${macho_embedded_${lib_suffix}_libs} 444 OUTPUT_DIR ${DARWIN_macho_embedded_LIBRARY_OUTPUT_DIR} 445 INSTALL_DIR ${DARWIN_macho_embedded_LIBRARY_INSTALL_DIR}) 446 endforeach() 447 endforeach() 448 endif() 449endmacro() 450