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