1 include(CMakeParseArguments) 2 3 # On OS X SDKs can be installed anywhere on the base system and xcode-select can 4 # set the default Xcode to use. This function finds the SDKs that are present in 5 # the current Xcode. 6 function(find_darwin_sdk_dir var sdk_name) 7 # Let's first try the internal SDK, otherwise use the public SDK. 8 execute_process( 9 COMMAND xcodebuild -version -sdk ${sdk_name}.internal Path 10 OUTPUT_VARIABLE var_internal 11 OUTPUT_STRIP_TRAILING_WHITESPACE 12 ERROR_FILE /dev/null 13 ) 14 if("" STREQUAL "${var_internal}") 15 execute_process( 16 COMMAND xcodebuild -version -sdk ${sdk_name} Path 17 OUTPUT_VARIABLE var_internal 18 OUTPUT_STRIP_TRAILING_WHITESPACE 19 ERROR_FILE /dev/null 20 ) 21 else() 22 set(${var}_INTERNAL ${var_internal} PARENT_SCOPE) 23 endif() 24 set(${var} ${var_internal} PARENT_SCOPE) 25 endfunction() 26 27 # There isn't a clear mapping of what architectures are supported with a given 28 # target platform, but ld's version output does list the architectures it can 29 # link for. 30 function(darwin_get_toolchain_supported_archs output_var) 31 execute_process( 32 COMMAND ld -v 33 ERROR_VARIABLE LINKER_VERSION) 34 35 string(REGEX MATCH "configured to support archs: ([^\n]+)" 36 ARCHES_MATCHED "${LINKER_VERSION}") 37 if(ARCHES_MATCHED) 38 set(ARCHES "${CMAKE_MATCH_1}") 39 message(STATUS "Got ld supported ARCHES: ${ARCHES}") 40 string(REPLACE " " ";" ARCHES ${ARCHES}) 41 else() 42 # If auto-detecting fails, fall back to a default set 43 message(WARNING "Detecting supported architectures from 'ld -v' failed. Returning default set.") 44 set(ARCHES "i386;x86_64;armv7;armv7s;arm64") 45 endif() 46 47 set(${output_var} ${ARCHES} PARENT_SCOPE) 48 endfunction() 49 50 # This function takes an OS and a list of architectures and identifies the 51 # subset of the architectures list that the installed toolchain can target. 52 function(darwin_test_archs os valid_archs) 53 if(${valid_archs}) 54 message(STATUS "Using cached valid architectures for ${os}.") 55 return() 56 endif() 57 58 set(archs ${ARGN}) 59 if(NOT TEST_COMPILE_ONLY) 60 message(STATUS "Finding valid architectures for ${os}...") 61 set(SIMPLE_C ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.c) 62 file(WRITE ${SIMPLE_C} "#include <stdio.h>\nint main() { printf(__FILE__); return 0; }\n") 63 64 set(os_linker_flags) 65 foreach(flag ${DARWIN_${os}_LINKFLAGS}) 66 set(os_linker_flags "${os_linker_flags} ${flag}") 67 endforeach() 68 endif() 69 70 # The simple program will build for x86_64h on the simulator because it is 71 # compatible with x86_64 libraries (mostly), but since x86_64h isn't actually 72 # a valid or useful architecture for the iOS simulator we should drop it. 73 if(${os} MATCHES "^(iossim|tvossim|watchossim)$") 74 list(REMOVE_ITEM archs "x86_64h") 75 endif() 76 77 set(working_archs) 78 foreach(arch ${archs}) 79 80 set(arch_linker_flags "-arch ${arch} ${os_linker_flags}") 81 if(TEST_COMPILE_ONLY) 82 try_compile_only(CAN_TARGET_${os}_${arch} -v -arch ${arch} ${DARWIN_${os}_CFLAGS}) 83 else() 84 try_compile(CAN_TARGET_${os}_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_C} 85 COMPILE_DEFINITIONS "-v -arch ${arch}" ${DARWIN_${os}_CFLAGS} 86 CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS=${arch_linker_flags}" 87 OUTPUT_VARIABLE TEST_OUTPUT) 88 endif() 89 if(${CAN_TARGET_${os}_${arch}}) 90 list(APPEND working_archs ${arch}) 91 else() 92 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 93 "Testing compiler for supporting ${os}-${arch}:\n" 94 "${TEST_OUTPUT}\n") 95 endif() 96 endforeach() 97 set(${valid_archs} ${working_archs} 98 CACHE STRING "List of valid architectures for platform ${os}.") 99 endfunction() 100 101 # This function checks the host cpusubtype to see if it is post-haswell. Haswell 102 # and later machines can run x86_64h binaries. Haswell is cpusubtype 8. 103 function(darwin_filter_host_archs input output) 104 list_intersect(tmp_var DARWIN_osx_ARCHS ${input}) 105 execute_process( 106 COMMAND sysctl hw.cpusubtype 107 OUTPUT_VARIABLE SUBTYPE) 108 109 string(REGEX MATCH "hw.cpusubtype: ([0-9]*)" 110 SUBTYPE_MATCHED "${SUBTYPE}") 111 set(HASWELL_SUPPORTED Off) 112 if(SUBTYPE_MATCHED) 113 if(${CMAKE_MATCH_1} GREATER 7) 114 set(HASWELL_SUPPORTED On) 115 endif() 116 endif() 117 if(NOT HASWELL_SUPPORTED) 118 list(REMOVE_ITEM tmp_var x86_64h) 119 endif() 120 set(${output} ${tmp_var} PARENT_SCOPE) 121 endfunction() 122 123 # Read and process the exclude file into a list of symbols 124 function(darwin_read_list_from_file output_var file) 125 if(EXISTS ${file}) 126 file(READ ${file} EXCLUDES) 127 string(REPLACE "\n" ";" EXCLUDES ${EXCLUDES}) 128 set(${output_var} ${EXCLUDES} PARENT_SCOPE) 129 endif() 130 endfunction() 131 132 # this function takes an OS, architecture and minimum version and provides a 133 # list of builtin functions to exclude 134 function(darwin_find_excluded_builtins_list output_var) 135 cmake_parse_arguments(LIB 136 "" 137 "OS;ARCH;MIN_VERSION" 138 "" 139 ${ARGN}) 140 141 if(NOT LIB_OS OR NOT LIB_ARCH) 142 message(FATAL_ERROR "Must specify OS and ARCH to darwin_find_excluded_builtins_list!") 143 endif() 144 145 darwin_read_list_from_file(${LIB_OS}_BUILTINS 146 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}.txt) 147 darwin_read_list_from_file(${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS 148 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}-${LIB_ARCH}.txt) 149 150 if(LIB_MIN_VERSION) 151 file(GLOB builtin_lists ${DARWIN_EXCLUDE_DIR}/${LIB_OS}*-${LIB_ARCH}.txt) 152 foreach(builtin_list ${builtin_lists}) 153 string(REGEX MATCH "${LIB_OS}([0-9\\.]*)-${LIB_ARCH}.txt" VERSION_MATCHED "${builtin_list}") 154 if (VERSION_MATCHED AND NOT CMAKE_MATCH_1 VERSION_LESS LIB_MIN_VERSION) 155 if(NOT smallest_version) 156 set(smallest_version ${CMAKE_MATCH_1}) 157 elseif(CMAKE_MATCH_1 VERSION_LESS smallest_version) 158 set(smallest_version ${CMAKE_MATCH_1}) 159 endif() 160 endif() 161 endforeach() 162 163 if(smallest_version) 164 darwin_read_list_from_file(${LIB_ARCH}_${LIB_OS}_BUILTINS 165 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}${smallest_version}-${LIB_ARCH}.txt) 166 endif() 167 endif() 168 169 set(${output_var} 170 ${${LIB_ARCH}_${LIB_OS}_BUILTINS} 171 ${${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS} 172 ${${LIB_OS}_BUILTINS} PARENT_SCOPE) 173 endfunction() 174 175 # adds a single builtin library for a single OS & ARCH 176 macro(darwin_add_builtin_library name suffix) 177 cmake_parse_arguments(LIB 178 "" 179 "PARENT_TARGET;OS;ARCH" 180 "SOURCES;CFLAGS;DEFS" 181 ${ARGN}) 182 set(libname "${name}.${suffix}_${LIB_ARCH}_${LIB_OS}") 183 add_library(${libname} STATIC ${LIB_SOURCES}) 184 if(DARWIN_${LIB_OS}_SYSROOT) 185 set(sysroot_flag -isysroot ${DARWIN_${LIB_OS}_SYSROOT}) 186 endif() 187 set_target_compile_flags(${libname} 188 ${sysroot_flag} 189 ${DARWIN_${LIB_OS}_BUILTIN_MIN_VER_FLAG} 190 ${LIB_CFLAGS}) 191 set_property(TARGET ${libname} APPEND PROPERTY 192 COMPILE_DEFINITIONS ${LIB_DEFS}) 193 set_target_properties(${libname} PROPERTIES 194 OUTPUT_NAME ${libname}${COMPILER_RT_OS_SUFFIX}) 195 set_target_properties(${libname} PROPERTIES 196 OSX_ARCHITECTURES ${LIB_ARCH}) 197 198 if(LIB_PARENT_TARGET) 199 add_dependencies(${LIB_PARENT_TARGET} ${libname}) 200 endif() 201 202 list(APPEND ${LIB_OS}_${suffix}_libs ${libname}) 203 list(APPEND ${LIB_OS}_${suffix}_lipo_flags -arch ${arch} $<TARGET_FILE:${libname}>) 204 endmacro() 205 206 function(darwin_lipo_libs name) 207 cmake_parse_arguments(LIB 208 "" 209 "PARENT_TARGET;OUTPUT_DIR;INSTALL_DIR" 210 "LIPO_FLAGS;DEPENDS" 211 ${ARGN}) 212 if(LIB_DEPENDS AND LIB_LIPO_FLAGS) 213 add_custom_command(OUTPUT ${LIB_OUTPUT_DIR}/lib${name}.a 214 COMMAND ${CMAKE_COMMAND} -E make_directory ${LIB_OUTPUT_DIR} 215 COMMAND lipo -output 216 ${LIB_OUTPUT_DIR}/lib${name}.a 217 -create ${LIB_LIPO_FLAGS} 218 DEPENDS ${LIB_DEPENDS} 219 ) 220 add_custom_target(${name} 221 DEPENDS ${LIB_OUTPUT_DIR}/lib${name}.a) 222 add_dependencies(${LIB_PARENT_TARGET} ${name}) 223 install(FILES ${LIB_OUTPUT_DIR}/lib${name}.a 224 DESTINATION ${LIB_INSTALL_DIR}) 225 else() 226 message(WARNING "Not generating lipo target for ${name} because no input libraries exist.") 227 endif() 228 endfunction() 229 230 # Filter out generic versions of routines that are re-implemented in 231 # architecture specific manner. This prevents multiple definitions of the 232 # same symbols, making the symbol selection non-deterministic. 233 function(darwin_filter_builtin_sources output_var exclude_or_include excluded_list) 234 if(exclude_or_include STREQUAL "EXCLUDE") 235 set(filter_action GREATER) 236 set(filter_value -1) 237 elseif(exclude_or_include STREQUAL "INCLUDE") 238 set(filter_action LESS) 239 set(filter_value 0) 240 else() 241 message(FATAL_ERROR "darwin_filter_builtin_sources called without EXCLUDE|INCLUDE") 242 endif() 243 244 set(intermediate ${ARGN}) 245 foreach (_file ${intermediate}) 246 get_filename_component(_name_we ${_file} NAME_WE) 247 list(FIND ${excluded_list} ${_name_we} _found) 248 if(_found ${filter_action} ${filter_value}) 249 list(REMOVE_ITEM intermediate ${_file}) 250 elseif(${_file} MATCHES ".*/.*\\.S" OR ${_file} MATCHES ".*/.*\\.c") 251 get_filename_component(_name ${_file} NAME) 252 string(REPLACE ".S" ".c" _cname "${_name}") 253 list(REMOVE_ITEM intermediate ${_cname}) 254 endif () 255 endforeach () 256 set(${output_var} ${intermediate} PARENT_SCOPE) 257 endfunction() 258 259 function(darwin_add_eprintf_library) 260 cmake_parse_arguments(LIB 261 "" 262 "" 263 "CFLAGS" 264 ${ARGN}) 265 266 add_library(clang_rt.eprintf STATIC eprintf.c) 267 set_target_compile_flags(clang_rt.eprintf 268 -isysroot ${DARWIN_osx_SYSROOT} 269 ${DARWIN_osx_BUILTIN_MIN_VER_FLAG} 270 -arch i386 271 ${LIB_CFLAGS}) 272 set_target_properties(clang_rt.eprintf PROPERTIES 273 OUTPUT_NAME clang_rt.eprintf${COMPILER_RT_OS_SUFFIX}) 274 set_target_properties(clang_rt.eprintf PROPERTIES 275 OSX_ARCHITECTURES i386) 276 add_dependencies(builtins clang_rt.eprintf) 277 set_target_properties(clang_rt.eprintf PROPERTIES 278 ARCHIVE_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}) 279 install(TARGETS clang_rt.eprintf 280 ARCHIVE DESTINATION ${COMPILER_RT_LIBRARY_INSTALL_DIR}) 281 endfunction() 282 283 # Generates builtin libraries for all operating systems specified in ARGN. Each 284 # OS library is constructed by lipo-ing together single-architecture libraries. 285 macro(darwin_add_builtin_libraries) 286 set(DARWIN_EXCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Darwin-excludes) 287 288 set(CFLAGS "-fPIC -O3 -fvisibility=hidden -DVISIBILITY_HIDDEN -Wall -fomit-frame-pointer") 289 set(CMAKE_C_FLAGS "") 290 set(CMAKE_CXX_FLAGS "") 291 set(CMAKE_ASM_FLAGS "") 292 293 set(PROFILE_SOURCES ../profile/InstrProfiling 294 ../profile/InstrProfilingBuffer 295 ../profile/InstrProfilingPlatformDarwin 296 ../profile/InstrProfilingWriter) 297 foreach (os ${ARGN}) 298 list_intersect(DARWIN_BUILTIN_ARCHS DARWIN_${os}_ARCHS BUILTIN_SUPPORTED_ARCH) 299 foreach (arch ${DARWIN_BUILTIN_ARCHS}) 300 darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS 301 OS ${os} 302 ARCH ${arch} 303 MIN_VERSION ${DARWIN_${os}_BUILTIN_MIN_VER}) 304 305 darwin_filter_builtin_sources(filtered_sources 306 EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS 307 ${${arch}_SOURCES}) 308 309 darwin_add_builtin_library(clang_rt builtins 310 OS ${os} 311 ARCH ${arch} 312 SOURCES ${filtered_sources} 313 CFLAGS ${CFLAGS} -arch ${arch} 314 PARENT_TARGET builtins) 315 endforeach() 316 317 # Don't build cc_kext libraries for simulator platforms 318 if(NOT DARWIN_${os}_SKIP_CC_KEXT) 319 foreach (arch ${DARWIN_BUILTIN_ARCHS}) 320 # By not specifying MIN_VERSION this only reads the OS and OS-arch lists. 321 # We don't want to filter out the builtins that are present in libSystem 322 # because kexts can't link libSystem. 323 darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS 324 OS ${os} 325 ARCH ${arch}) 326 327 darwin_filter_builtin_sources(filtered_sources 328 EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS 329 ${${arch}_SOURCES}) 330 331 # In addition to the builtins cc_kext includes some profile sources 332 darwin_add_builtin_library(clang_rt cc_kext 333 OS ${os} 334 ARCH ${arch} 335 SOURCES ${filtered_sources} ${PROFILE_SOURCES} 336 CFLAGS ${CFLAGS} -arch ${arch} -mkernel 337 DEFS KERNEL_USE 338 PARENT_TARGET builtins) 339 endforeach() 340 set(archive_name clang_rt.cc_kext_${os}) 341 if(${os} STREQUAL "osx") 342 set(archive_name clang_rt.cc_kext) 343 endif() 344 darwin_lipo_libs(${archive_name} 345 PARENT_TARGET builtins 346 LIPO_FLAGS ${${os}_cc_kext_lipo_flags} 347 DEPENDS ${${os}_cc_kext_libs} 348 OUTPUT_DIR ${COMPILER_RT_LIBRARY_OUTPUT_DIR} 349 INSTALL_DIR ${COMPILER_RT_LIBRARY_INSTALL_DIR}) 350 endif() 351 endforeach() 352 353 darwin_add_eprintf_library(CFLAGS ${CFLAGS}) 354 355 # We put the x86 sim slices into the archives for their base OS 356 foreach (os ${ARGN}) 357 if(NOT ${os} MATCHES ".*sim$") 358 darwin_lipo_libs(clang_rt.${os} 359 PARENT_TARGET builtins 360 LIPO_FLAGS ${${os}_builtins_lipo_flags} ${${os}sim_builtins_lipo_flags} 361 DEPENDS ${${os}_builtins_libs} ${${os}sim_builtins_libs} 362 OUTPUT_DIR ${COMPILER_RT_LIBRARY_OUTPUT_DIR} 363 INSTALL_DIR ${COMPILER_RT_LIBRARY_INSTALL_DIR}) 364 endif() 365 endforeach() 366 darwin_add_embedded_builtin_libraries() 367 endmacro() 368 369 macro(darwin_add_embedded_builtin_libraries) 370 # this is a hacky opt-out. If you can't target both intel and arm 371 # architectures we bail here. 372 set(DARWIN_SOFT_FLOAT_ARCHS armv6m armv7m armv7em armv7) 373 set(DARWIN_HARD_FLOAT_ARCHS armv7em armv7) 374 if(COMPILER_RT_SUPPORTED_ARCH MATCHES ".*armv.*") 375 list(FIND COMPILER_RT_SUPPORTED_ARCH i386 i386_idx) 376 if(i386_idx GREATER -1) 377 list(APPEND DARWIN_HARD_FLOAT_ARCHS i386) 378 endif() 379 380 list(FIND COMPILER_RT_SUPPORTED_ARCH x86_64 x86_64_idx) 381 if(x86_64_idx GREATER -1) 382 list(APPEND DARWIN_HARD_FLOAT_ARCHS x86_64) 383 endif() 384 385 set(MACHO_SYM_DIR ${CMAKE_CURRENT_SOURCE_DIR}/macho_embedded) 386 387 set(CFLAGS "-Oz -Wall -fomit-frame-pointer -ffreestanding") 388 set(CMAKE_C_FLAGS "") 389 set(CMAKE_CXX_FLAGS "") 390 set(CMAKE_ASM_FLAGS "") 391 392 set(SOFT_FLOAT_FLAG -mfloat-abi=soft) 393 set(HARD_FLOAT_FLAG -mfloat-abi=hard) 394 395 set(ENABLE_PIC Off) 396 set(PIC_FLAG -fPIC) 397 set(STATIC_FLAG -static) 398 399 set(DARWIN_macho_embedded_ARCHS armv6m armv7m armv7em armv7 i386 x86_64) 400 401 set(DARWIN_macho_embedded_LIBRARY_OUTPUT_DIR 402 ${COMPILER_RT_OUTPUT_DIR}/lib/macho_embedded) 403 set(DARWIN_macho_embedded_LIBRARY_INSTALL_DIR 404 ${COMPILER_RT_INSTALL_PATH}/lib/macho_embedded) 405 406 set(CFLAGS_armv7 "-target thumbv7-apple-darwin-eabi") 407 set(CFLAGS_i386 "-march=pentium") 408 409 darwin_read_list_from_file(common_FUNCTIONS ${MACHO_SYM_DIR}/common.txt) 410 darwin_read_list_from_file(thumb2_FUNCTIONS ${MACHO_SYM_DIR}/thumb2.txt) 411 darwin_read_list_from_file(thumb2_64_FUNCTIONS ${MACHO_SYM_DIR}/thumb2-64.txt) 412 darwin_read_list_from_file(arm_FUNCTIONS ${MACHO_SYM_DIR}/arm.txt) 413 darwin_read_list_from_file(i386_FUNCTIONS ${MACHO_SYM_DIR}/i386.txt) 414 415 416 set(armv6m_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS}) 417 set(armv7m_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS}) 418 set(armv7em_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS}) 419 set(armv7_FUNCTIONS ${common_FUNCTIONS} ${arm_FUNCTIONS} ${thumb2_FUNCTIONS} ${thumb2_64_FUNCTIONS}) 420 set(i386_FUNCTIONS ${common_FUNCTIONS} ${i386_FUNCTIONS}) 421 set(x86_64_FUNCTIONS ${common_FUNCTIONS}) 422 423 foreach(arch ${DARWIN_macho_embedded_ARCHS}) 424 darwin_filter_builtin_sources(${arch}_filtered_sources 425 INCLUDE ${arch}_FUNCTIONS 426 ${${arch}_SOURCES}) 427 if(NOT ${arch}_filtered_sources) 428 message("${arch}_SOURCES: ${${arch}_SOURCES}") 429 message("${arch}_FUNCTIONS: ${${arch}_FUNCTIONS}") 430 message(FATAL_ERROR "Empty filtered sources!") 431 endif() 432 endforeach() 433 434 foreach(float_type SOFT HARD) 435 foreach(type PIC STATIC) 436 string(TOLOWER "${float_type}_${type}" lib_suffix) 437 foreach(arch ${DARWIN_${float_type}_FLOAT_ARCHS}) 438 set(DARWIN_macho_embedded_SYSROOT ${DARWIN_osx_SYSROOT}) 439 set(float_flag) 440 if(${arch} MATCHES "^arm") 441 # x86 targets are hard float by default, but the complain about the 442 # float ABI flag, so don't pass it unless we're targeting arm. 443 set(float_flag ${${float_type}_FLOAT_FLAG}) 444 endif() 445 darwin_add_builtin_library(clang_rt ${lib_suffix} 446 OS macho_embedded 447 ARCH ${arch} 448 SOURCES ${${arch}_filtered_sources} 449 CFLAGS ${CFLAGS} -arch ${arch} ${${type}_FLAG} ${float_flag} ${CFLAGS_${arch}} 450 PARENT_TARGET builtins) 451 endforeach() 452 foreach(lib ${macho_embedded_${lib_suffix}_libs}) 453 set_target_properties(${lib} PROPERTIES LINKER_LANGUAGE C) 454 endforeach() 455 darwin_lipo_libs(clang_rt.${lib_suffix} 456 PARENT_TARGET builtins 457 LIPO_FLAGS ${macho_embedded_${lib_suffix}_lipo_flags} 458 DEPENDS ${macho_embedded_${lib_suffix}_libs} 459 OUTPUT_DIR ${DARWIN_macho_embedded_LIBRARY_OUTPUT_DIR} 460 INSTALL_DIR ${DARWIN_macho_embedded_LIBRARY_INSTALL_DIR}) 461 endforeach() 462 endforeach() 463 endif() 464 endmacro() 465
