1# On OS X SDKs can be installed anywhere on the base system and xcode-select can 2# set the default Xcode to use. This function finds the SDKs that are present in 3# the current Xcode. 4function(find_darwin_sdk_dir var sdk_name) 5 # Let's first try the internal SDK, otherwise use the public SDK. 6 execute_process( 7 COMMAND xcodebuild -version -sdk ${sdk_name}.internal Path 8 OUTPUT_VARIABLE var_internal 9 OUTPUT_STRIP_TRAILING_WHITESPACE 10 ERROR_FILE /dev/null 11 ) 12 if("" STREQUAL "${var_internal}") 13 execute_process( 14 COMMAND xcodebuild -version -sdk ${sdk_name} Path 15 OUTPUT_VARIABLE var_internal 16 OUTPUT_STRIP_TRAILING_WHITESPACE 17 ERROR_FILE /dev/null 18 ) 19 endif() 20 set(${var} ${var_internal} PARENT_SCOPE) 21endfunction() 22 23# There isn't a clear mapping of what architectures are supported with a given 24# target platform, but ld's version output does list the architectures it can 25# link for. 26function(darwin_get_toolchain_supported_archs output_var) 27 execute_process( 28 COMMAND ld -v 29 ERROR_VARIABLE LINKER_VERSION) 30 31 string(REGEX MATCH "configured to support archs: ([^\n]+)" 32 ARCHES_MATCHED "${LINKER_VERSION}") 33 if(ARCHES_MATCHED) 34 set(ARCHES "${CMAKE_MATCH_1}") 35 message(STATUS "Got ld supported ARCHES: ${ARCHES}") 36 string(REPLACE " " ";" ARCHES ${ARCHES}) 37 else() 38 # If auto-detecting fails, fall back to a default set 39 message(WARNING "Detecting supported architectures from 'ld -v' failed. Returning default set.") 40 set(ARCHES "i386;x86_64;armv7;armv7s;arm64") 41 endif() 42 43 set(${output_var} ${ARCHES} PARENT_SCOPE) 44endfunction() 45 46# This function takes an OS and a list of architectures and identifies the 47# subset of the architectures list that the installed toolchain can target. 48function(darwin_test_archs os valid_archs) 49 if(${valid_archs}) 50 message(STATUS "Using cached valid architectures for ${os}.") 51 return() 52 endif() 53 54 set(archs ${ARGN}) 55 message(STATUS "Finding valid architectures for ${os}...") 56 set(SIMPLE_CPP ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.cpp) 57 file(WRITE ${SIMPLE_CPP} "#include <iostream>\nint main() { std::cout << std::endl; return 0; }\n") 58 59 set(os_linker_flags) 60 foreach(flag ${DARWIN_${os}_LINKFLAGS}) 61 set(os_linker_flags "${os_linker_flags} ${flag}") 62 endforeach() 63 64 # The simple program will build for x86_64h on the simulator because it is 65 # compatible with x86_64 libraries (mostly), but since x86_64h isn't actually 66 # a valid or useful architecture for the iOS simulator we should drop it. 67 if(${os} STREQUAL "iossim") 68 list(REMOVE_ITEM archs "x86_64h") 69 endif() 70 71 set(working_archs) 72 foreach(arch ${archs}) 73 74 set(arch_linker_flags "-arch ${arch} ${os_linker_flags}") 75 try_compile(CAN_TARGET_${os}_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_CPP} 76 COMPILE_DEFINITIONS "-v -arch ${arch}" ${DARWIN_${os}_CFLAGS} 77 CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS=${arch_linker_flags}" 78 OUTPUT_VARIABLE TEST_OUTPUT) 79 if(${CAN_TARGET_${os}_${arch}}) 80 list(APPEND working_archs ${arch}) 81 endif() 82 endforeach() 83 set(${valid_archs} ${working_archs} 84 CACHE STRING "List of valid architectures for platform ${os}.") 85endfunction() 86 87# This function checks the host cpusubtype to see if it is post-haswell. Haswell 88# and later machines can run x86_64h binaries. Haswell is cpusubtype 8. 89function(darwin_filter_host_archs input output) 90 list_union(tmp_var DARWIN_osx_ARCHS ${input}) 91 execute_process( 92 COMMAND sysctl hw.cpusubtype 93 OUTPUT_VARIABLE SUBTYPE) 94 95 string(REGEX MATCH "hw.cpusubtype: ([0-9]*)" 96 SUBTYPE_MATCHED "${SUBTYPE}") 97 set(HASWELL_SUPPORTED Off) 98 if(SUBTYPE_MATCHED) 99 if(${CMAKE_MATCH_1} GREATER 7) 100 set(HASWELL_SUPPORTED On) 101 endif() 102 endif() 103 if(NOT HASWELL_SUPPORTED) 104 list(REMOVE_ITEM tmp_var x86_64h) 105 endif() 106 set(${output} ${tmp_var} PARENT_SCOPE) 107endfunction() 108 109# Read and process the exclude file into a list of symbols 110function(darwin_read_list_from_file output_var file) 111 if(EXISTS ${file}) 112 file(READ ${file} EXCLUDES) 113 string(REPLACE "\n" ";" EXCLUDES ${EXCLUDES}) 114 set(${output_var} ${EXCLUDES} PARENT_SCOPE) 115 endif() 116endfunction() 117 118# this function takes an OS, architecture and minimum version and provides a 119# list of builtin functions to exclude 120function(darwin_find_excluded_builtins_list output_var) 121 cmake_parse_arguments(LIB 122 "" 123 "OS;ARCH;MIN_VERSION" 124 "" 125 ${ARGN}) 126 127 if(NOT LIB_OS OR NOT LIB_ARCH) 128 message(FATAL_ERROR "Must specify OS and ARCH to darwin_find_excluded_builtins_list!") 129 endif() 130 131 darwin_read_list_from_file(${LIB_OS}_BUILTINS 132 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}.txt) 133 darwin_read_list_from_file(${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS 134 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}-${LIB_ARCH}.txt) 135 136 if(LIB_MIN_VERSION) 137 file(GLOB builtin_lists ${DARWIN_EXCLUDE_DIR}/${LIB_OS}*-${LIB_ARCH}.txt) 138 foreach(builtin_list ${builtin_lists}) 139 string(REGEX MATCH "${LIB_OS}([0-9\\.]*)-${LIB_ARCH}.txt" VERSION_MATCHED "${builtin_list}") 140 if (VERSION_MATCHED AND NOT CMAKE_MATCH_1 VERSION_LESS LIB_MIN_VERSION) 141 if(NOT smallest_version) 142 set(smallest_version ${CMAKE_MATCH_1}) 143 elseif(CMAKE_MATCH_1 VERSION_LESS smallest_version) 144 set(smallest_version ${CMAKE_MATCH_1}) 145 endif() 146 endif() 147 endforeach() 148 149 if(smallest_version) 150 darwin_read_list_from_file(${LIB_ARCH}_${LIB_OS}_BUILTINS 151 ${DARWIN_EXCLUDE_DIR}/${LIB_OS}${smallest_version}-${LIB_ARCH}.txt) 152 endif() 153 endif() 154 155 set(${output_var} 156 ${${LIB_ARCH}_${LIB_OS}_BUILTINS} 157 ${${LIB_OS}_${LIB_ARCH}_BASE_BUILTINS} 158 ${${LIB_OS}_BUILTINS} PARENT_SCOPE) 159endfunction() 160 161# adds a single builtin library for a single OS & ARCH 162macro(darwin_add_builtin_library name suffix) 163 cmake_parse_arguments(LIB 164 "" 165 "PARENT_TARGET;OS;ARCH" 166 "SOURCES;CFLAGS;DEFS" 167 ${ARGN}) 168 set(libname "${name}.${suffix}_${LIB_ARCH}_${LIB_OS}") 169 add_library(${libname} STATIC ${LIB_SOURCES}) 170 if(DARWIN_${LIB_OS}_SYSROOT) 171 set(sysroot_flag -isysroot ${DARWIN_${LIB_OS}_SYSROOT}) 172 endif() 173 set_target_compile_flags(${libname} 174 ${sysroot_flag} 175 ${DARWIN_${LIB_OS}_BUILTIN_MIN_VER_FLAG} 176 ${LIB_CFLAGS}) 177 set_property(TARGET ${libname} APPEND PROPERTY 178 COMPILE_DEFINITIONS ${LIB_DEFS}) 179 set_target_properties(${libname} PROPERTIES 180 OUTPUT_NAME ${libname}${COMPILER_RT_OS_SUFFIX}) 181 set_target_properties(${libname} PROPERTIES 182 OSX_ARCHITECTURES ${LIB_ARCH}) 183 184 if(LIB_PARENT_TARGET) 185 add_dependencies(${LIB_PARENT_TARGET} ${libname}) 186 endif() 187 188 list(APPEND ${LIB_OS}_${suffix}_libs ${libname}) 189 list(APPEND ${LIB_OS}_${suffix}_lipo_flags -arch ${arch} $<TARGET_FILE:${libname}>) 190endmacro() 191 192function(darwin_lipo_libs name) 193 cmake_parse_arguments(LIB 194 "" 195 "PARENT_TARGET;OUTPUT_DIR;INSTALL_DIR" 196 "LIPO_FLAGS;DEPENDS" 197 ${ARGN}) 198 if(LIB_DEPENDS AND LIB_LIPO_FLAGS) 199 add_custom_command(OUTPUT ${LIB_OUTPUT_DIR}/lib${name}.a 200 COMMAND ${CMAKE_COMMAND} -E make_directory ${LIB_OUTPUT_DIR} 201 COMMAND lipo -output 202 ${LIB_OUTPUT_DIR}/lib${name}.a 203 -create ${LIB_LIPO_FLAGS} 204 DEPENDS ${LIB_DEPENDS} 205 ) 206 add_custom_target(${name} 207 DEPENDS ${LIB_OUTPUT_DIR}/lib${name}.a) 208 add_dependencies(${LIB_PARENT_TARGET} ${name}) 209 install(FILES ${LIB_OUTPUT_DIR}/lib${name}.a 210 DESTINATION ${LIB_INSTALL_DIR}) 211 else() 212 message(WARNING "Not generating lipo target for ${name} because no input libraries exist.") 213 endif() 214endfunction() 215 216# Filter out generic versions of routines that are re-implemented in 217# architecture specific manner. This prevents multiple definitions of the 218# same symbols, making the symbol selection non-deterministic. 219function(darwin_filter_builtin_sources output_var exclude_or_include excluded_list) 220 if(exclude_or_include STREQUAL "EXCLUDE") 221 set(filter_action GREATER) 222 set(filter_value -1) 223 elseif(exclude_or_include STREQUAL "INCLUDE") 224 set(filter_action LESS) 225 set(filter_value 0) 226 else() 227 message(FATAL_ERROR "darwin_filter_builtin_sources called without EXCLUDE|INCLUDE") 228 endif() 229 230 set(intermediate ${ARGN}) 231 foreach (_file ${intermediate}) 232 get_filename_component(_name_we ${_file} NAME_WE) 233 list(FIND ${excluded_list} ${_name_we} _found) 234 if(_found ${filter_action} ${filter_value}) 235 list(REMOVE_ITEM intermediate ${_file}) 236 elseif(${_file} MATCHES ".*/.*\\.S" OR ${_file} MATCHES ".*/.*\\.c") 237 get_filename_component(_name ${_file} NAME) 238 string(REPLACE ".S" ".c" _cname "${_name}") 239 list(REMOVE_ITEM intermediate ${_cname}) 240 endif () 241 endforeach () 242 set(${output_var} ${intermediate} PARENT_SCOPE) 243endfunction() 244 245function(darwin_add_eprintf_library) 246 cmake_parse_arguments(LIB 247 "" 248 "" 249 "CFLAGS" 250 ${ARGN}) 251 252 add_library(clang_rt.eprintf STATIC eprintf.c) 253 set_target_compile_flags(clang_rt.eprintf 254 -isysroot ${DARWIN_osx_SYSROOT} 255 ${DARWIN_osx_BUILTIN_MIN_VER_FLAG} 256 -arch i386 257 ${LIB_CFLAGS}) 258 set_target_properties(clang_rt.eprintf PROPERTIES 259 OUTPUT_NAME clang_rt.eprintf${COMPILER_RT_OS_SUFFIX}) 260 set_target_properties(clang_rt.eprintf PROPERTIES 261 OSX_ARCHITECTURES i386) 262 add_dependencies(builtins clang_rt.eprintf) 263 set_target_properties(clang_rt.eprintf PROPERTIES 264 ARCHIVE_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}) 265 install(TARGETS clang_rt.eprintf 266 ARCHIVE DESTINATION ${COMPILER_RT_LIBRARY_INSTALL_DIR}) 267endfunction() 268 269# Generates builtin libraries for all operating systems specified in ARGN. Each 270# OS library is constructed by lipo-ing together single-architecture libraries. 271macro(darwin_add_builtin_libraries) 272 set(DARWIN_EXCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Darwin-excludes) 273 274 set(CFLAGS "-fPIC -O3 -fvisibility=hidden -DVISIBILITY_HIDDEN -Wall -fomit-frame-pointer") 275 set(CMAKE_C_FLAGS "") 276 set(CMAKE_CXX_FLAGS "") 277 set(CMAKE_ASM_FLAGS "") 278 279 set(PROFILE_SOURCES ../profile/InstrProfiling 280 ../profile/InstrProfilingBuffer 281 ../profile/InstrProfilingPlatformDarwin) 282 foreach (os ${ARGN}) 283 list_union(DARWIN_BUILTIN_ARCHS DARWIN_${os}_ARCHS BUILTIN_SUPPORTED_ARCH) 284 foreach (arch ${DARWIN_BUILTIN_ARCHS}) 285 darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS 286 OS ${os} 287 ARCH ${arch} 288 MIN_VERSION ${DARWIN_${os}_BUILTIN_MIN_VER}) 289 290 darwin_filter_builtin_sources(filtered_sources 291 EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS 292 ${${arch}_SOURCES}) 293 294 darwin_add_builtin_library(clang_rt builtins 295 OS ${os} 296 ARCH ${arch} 297 SOURCES ${filtered_sources} 298 CFLAGS ${CFLAGS} -arch ${arch} 299 PARENT_TARGET builtins) 300 endforeach() 301 302 # Don't build cc_kext libraries for simulator platforms 303 if(NOT DARWIN_${os}_SKIP_CC_KEXT) 304 foreach (arch ${DARWIN_BUILTIN_ARCHS}) 305 # By not specifying MIN_VERSION this only reads the OS and OS-arch lists. 306 # We don't want to filter out the builtins that are present in libSystem 307 # because kexts can't link libSystem. 308 darwin_find_excluded_builtins_list(${arch}_${os}_EXCLUDED_BUILTINS 309 OS ${os} 310 ARCH ${arch}) 311 312 darwin_filter_builtin_sources(filtered_sources 313 EXCLUDE ${arch}_${os}_EXCLUDED_BUILTINS 314 ${${arch}_SOURCES}) 315 316 # In addition to the builtins cc_kext includes some profile sources 317 darwin_add_builtin_library(clang_rt cc_kext 318 OS ${os} 319 ARCH ${arch} 320 SOURCES ${filtered_sources} ${PROFILE_SOURCES} 321 CFLAGS ${CFLAGS} -arch ${arch} -mkernel 322 DEFS KERNEL_USE 323 PARENT_TARGET builtins) 324 endforeach() 325 set(archive_name clang_rt.cc_kext_${os}) 326 if(${os} STREQUAL "osx") 327 set(archive_name clang_rt.cc_kext) 328 endif() 329 darwin_lipo_libs(${archive_name} 330 PARENT_TARGET builtins 331 LIPO_FLAGS ${${os}_cc_kext_lipo_flags} 332 DEPENDS ${${os}_cc_kext_libs} 333 OUTPUT_DIR ${COMPILER_RT_LIBRARY_OUTPUT_DIR} 334 INSTALL_DIR ${COMPILER_RT_LIBRARY_INSTALL_DIR}) 335 endif() 336 endforeach() 337 338 darwin_add_eprintf_library(CFLAGS ${CFLAGS}) 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 ${DARWIN_macho_embedded_ARCHS}) 409 darwin_filter_builtin_sources(${arch}_filtered_sources 410 INCLUDE ${arch}_FUNCTIONS 411 ${${arch}_SOURCES}) 412 if(NOT ${arch}_filtered_sources) 413 message("${arch}_SOURCES: ${${arch}_SOURCES}") 414 message("${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