1 # CMake build for CompilerRT. 2 # 3 # This build assumes that CompilerRT is checked out into the 4 # 'projects/compiler-rt' inside of an LLVM tree. 5 # Standalone build system for CompilerRT is not yet ready. 6 # 7 # An important constraint of the build is that it only produces libraries 8 # based on the ability of the host toolchain to target various platforms. 9 10 # Check if compiler-rt is built as a standalone project. 11 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) 12 project(CompilerRT) 13 set(COMPILER_RT_STANDALONE_BUILD TRUE) 14 else() 15 set(COMPILER_RT_STANDALONE_BUILD FALSE) 16 endif() 17 18 # The CompilerRT build system requires CMake version 2.8.8 or higher in order 19 # to use its support for building convenience "libraries" as a collection of 20 # .o files. This is particularly useful in producing larger, more complex 21 # runtime libraries. 22 if (NOT MSVC) 23 cmake_minimum_required(VERSION 2.8.8) 24 else() 25 # Version 2.8.12.1 is required to build with Visual Studion 2013. 26 cmake_minimum_required(VERSION 2.8.12.1) 27 endif() 28 29 # FIXME: It may be removed when we use 2.8.12. 30 if(CMAKE_VERSION VERSION_LESS 2.8.12) 31 # Invalidate a couple of keywords. 32 set(cmake_2_8_12_INTERFACE) 33 set(cmake_2_8_12_PRIVATE) 34 else() 35 # Use ${cmake_2_8_12_KEYWORD} intead of KEYWORD in target_link_libraries(). 36 set(cmake_2_8_12_INTERFACE INTERFACE) 37 set(cmake_2_8_12_PRIVATE PRIVATE) 38 if(POLICY CMP0022) 39 cmake_policy(SET CMP0022 NEW) # automatic when 2.8.12 is required 40 endif() 41 endif() 42 43 # Top level target used to build all compiler-rt libraries. 44 add_custom_target(compiler-rt ALL) 45 46 if (NOT COMPILER_RT_STANDALONE_BUILD) 47 # Compute the Clang version from the LLVM version. 48 # FIXME: We should be able to reuse CLANG_VERSION variable calculated 49 # in Clang cmake files, instead of copying the rules here. 50 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION 51 ${PACKAGE_VERSION}) 52 # Setup the paths where compiler-rt runtimes and headers should be stored. 53 set(COMPILER_RT_OUTPUT_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION}) 54 set(COMPILER_RT_EXEC_OUTPUT_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR}) 55 set(COMPILER_RT_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}) 56 option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." 57 ${LLVM_INCLUDE_TESTS}) 58 option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" 59 ${LLVM_ENABLE_WERROR}) 60 # Use just-built Clang to compile/link tests on all platforms, except for 61 # Windows where we need to use clang-cl instead. 62 if(NOT MSVC) 63 set(COMPILER_RT_TEST_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang) 64 else() 65 set(COMPILER_RT_TEST_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang.exe) 66 endif() 67 else() 68 # Take output dir and install path from the user. 69 set(COMPILER_RT_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR} CACHE PATH 70 "Path where built compiler-rt libraries should be stored.") 71 set(COMPILER_RT_EXEC_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/bin CACHE PATH 72 "Path where built compiler-rt executables should be stored.") 73 set(COMPILER_RT_INSTALL_PATH ${CMAKE_INSTALL_PREFIX} CACHE PATH 74 "Path where built compiler-rt libraries should be installed.") 75 option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." OFF) 76 option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" OFF) 77 # Use a host compiler to compile/link tests. 78 set(COMPILER_RT_TEST_COMPILER ${CMAKE_C_COMPILER} CACHE PATH "Compiler to use for testing") 79 80 if (NOT LLVM_CONFIG_PATH) 81 find_program(LLVM_CONFIG_PATH "llvm-config" 82 DOC "Path to llvm-config binary") 83 if (NOT LLVM_CONFIG_PATH) 84 message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH") 85 endif() 86 endif() 87 execute_process( 88 COMMAND ${LLVM_CONFIG_PATH} "--obj-root" "--bindir" "--libdir" "--src-root" 89 RESULT_VARIABLE HAD_ERROR 90 OUTPUT_VARIABLE CONFIG_OUTPUT) 91 if (HAD_ERROR) 92 message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}") 93 endif() 94 string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";" CONFIG_OUTPUT ${CONFIG_OUTPUT}) 95 list(GET CONFIG_OUTPUT 0 LLVM_BINARY_DIR) 96 list(GET CONFIG_OUTPUT 1 LLVM_TOOLS_BINARY_DIR) 97 list(GET CONFIG_OUTPUT 2 LLVM_LIBRARY_DIR) 98 list(GET CONFIG_OUTPUT 3 LLVM_MAIN_SRC_DIR) 99 100 # Make use of LLVM CMake modules. 101 file(TO_CMAKE_PATH ${LLVM_BINARY_DIR} LLVM_BINARY_DIR_CMAKE_STYLE) 102 set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR_CMAKE_STYLE}/share/llvm/cmake") 103 list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}") 104 # Get some LLVM variables from LLVMConfig. 105 include("${LLVM_CMAKE_PATH}/LLVMConfig.cmake") 106 107 set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib) 108 109 # Find Python interpreter. 110 set(Python_ADDITIONAL_VERSIONS 2.7 2.6 2.5) 111 include(FindPythonInterp) 112 if(NOT PYTHONINTERP_FOUND) 113 message(FATAL_ERROR " 114 Unable to find Python interpreter required testing. Please install Python 115 or specify the PYTHON_EXECUTABLE CMake variable.") 116 endif() 117 118 # Define default arguments to lit. 119 set(LIT_ARGS_DEFAULT "-sv") 120 if (MSVC OR XCODE) 121 set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar") 122 endif() 123 set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit") 124 endif() 125 126 if("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang[+]*$") 127 set(COMPILER_RT_TEST_COMPILER_ID Clang) 128 elseif("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang.*.exe$") 129 set(COMPILER_RT_TEST_COMPILER_ID Clang) 130 else() 131 set(COMPILER_RT_TEST_COMPILER_ID GNU) 132 endif() 133 134 # Tests using XFAIL use the first value in COMPILER_RT_TEST_TARGET_TRIPLE 135 set(COMPILER_RT_TEST_TARGET_TRIPLE ${TARGET_TRIPLE} CACHE STRING 136 "Default triple for cross-compiled executables") 137 string(REPLACE "-" ";" TARGET_TRIPLE_LIST ${COMPILER_RT_TEST_TARGET_TRIPLE}) 138 list(GET TARGET_TRIPLE_LIST 0 COMPILER_RT_TEST_TARGET_ARCH) 139 list(GET TARGET_TRIPLE_LIST 1 COMPILER_RT_TEST_TARGET_OS) 140 list(GET TARGET_TRIPLE_LIST 2 COMPILER_RT_TEST_TARGET_ABI) 141 142 if ("${COMPILER_RT_TEST_TARGET_ABI}" STREQUAL "androideabi") 143 set(ANDROID 1) 144 endif() 145 146 string(TOLOWER ${CMAKE_SYSTEM_NAME} COMPILER_RT_OS_DIR) 147 set(COMPILER_RT_LIBRARY_OUTPUT_DIR 148 ${COMPILER_RT_OUTPUT_DIR}/lib/${COMPILER_RT_OS_DIR}) 149 set(COMPILER_RT_LIBRARY_INSTALL_DIR 150 ${COMPILER_RT_INSTALL_PATH}/lib/${COMPILER_RT_OS_DIR}) 151 152 # Add path for custom compiler-rt modules. 153 set(CMAKE_MODULE_PATH 154 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 155 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 156 ${CMAKE_MODULE_PATH} 157 ) 158 include(CompilerRTUtils) 159 160 set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) 161 set(COMPILER_RT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) 162 # Setup custom SDK sysroots. 163 set(COMPILER_RT_DARWIN_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/darwin) 164 set(COMPILER_RT_LINUX_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/linux) 165 166 set(COMPILER_RT_EXTRA_ANDROID_HEADERS ${COMPILER_RT_SOURCE_DIR}/android/include) 167 168 # Detect whether the current target platform is 32-bit or 64-bit, and setup 169 # the correct commandline flags needed to attempt to target 32-bit and 64-bit. 170 if (NOT CMAKE_SIZEOF_VOID_P EQUAL 4 AND 171 NOT CMAKE_SIZEOF_VOID_P EQUAL 8) 172 message(FATAL_ERROR "Please use architecture with 4 or 8 byte pointers.") 173 endif() 174 if (NOT MSVC) 175 set(TARGET_64_BIT_CFLAGS "-m64") 176 set(TARGET_32_BIT_CFLAGS "-m32") 177 else() 178 set(TARGET_64_BIT_CFLAGS "") 179 set(TARGET_32_BIT_CFLAGS "") 180 endif() 181 182 # List of architectures we can target. 183 set(COMPILER_RT_SUPPORTED_ARCH) 184 185 function(get_target_flags_for_arch arch out_var) 186 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX) 187 if(ARCH_INDEX EQUAL -1) 188 message(FATAL_ERROR "Unsupported architecture: ${arch}") 189 else() 190 set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE) 191 endif() 192 endfunction() 193 194 # Try to compile a very simple source file to ensure we can target the given 195 # platform. We use the results of these tests to build only the various target 196 # runtime libraries supported by our current compilers cross-compiling 197 # abilities. 198 set(SIMPLE_SOURCE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.cc) 199 file(WRITE ${SIMPLE_SOURCE} "#include <stdlib.h>\n#include <limits>\nint main() {}\n") 200 201 # test_target_arch(<arch> <target flags...>) 202 # Sets the target flags for a given architecture and determines if this 203 # architecture is supported by trying to build a simple file. 204 macro(test_target_arch arch) 205 set(TARGET_${arch}_CFLAGS ${ARGN}) 206 try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE} 207 COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}" 208 OUTPUT_VARIABLE TARGET_${arch}_OUTPUT 209 CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_${arch}_CFLAGS}") 210 if(${CAN_TARGET_${arch}}) 211 list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch}) 212 elseif("${COMPILER_RT_TEST_TARGET_ARCH}" MATCHES "${arch}" OR 213 "${arch}" STREQUAL "arm_android") 214 # Bail out if we cannot target the architecture we plan to test. 215 message(FATAL_ERROR "Cannot compile for ${arch}:\n${TARGET_${arch}_OUTPUT}") 216 endif() 217 endmacro() 218 219 if(ANDROID) 220 test_target_arch(arm_android "") 221 else() 222 if("${LLVM_NATIVE_ARCH}" STREQUAL "X86") 223 if (NOT MSVC) 224 test_target_arch(x86_64 ${TARGET_64_BIT_CFLAGS}) 225 endif() 226 test_target_arch(i386 ${TARGET_32_BIT_CFLAGS}) 227 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC") 228 test_target_arch(powerpc64 ${TARGET_64_BIT_CFLAGS}) 229 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "Mips") 230 test_target_arch(mips "") 231 endif() 232 233 # Build ARM libraries if we are configured to test on ARM 234 if("${COMPILER_RT_TEST_TARGET_ARCH}" MATCHES "arm|aarch64") 235 test_target_arch(arm "-march=armv7-a") 236 test_target_arch(aarch64 "-march=armv8-a") 237 endif() 238 endif() 239 240 # We support running instrumented tests when we're not cross compiling 241 # and target a UNIX-like system or Windows. 242 # We can run tests on Android even when we are cross-compiling. 243 if(("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND (UNIX OR MSVC)) OR ANDROID 244 OR COMPILER_RT_EMULATOR) 245 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" ON) 246 else() 247 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" OFF) 248 endif() 249 250 # Check if compiler-rt is built with libc++. 251 find_flag_in_string("${CMAKE_CXX_FLAGS}" "-stdlib=libc++" 252 COMPILER_RT_USES_LIBCXX) 253 254 function(filter_available_targets out_var) 255 set(archs) 256 foreach(arch ${ARGN}) 257 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX) 258 if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch}) 259 list(APPEND archs ${arch}) 260 endif() 261 endforeach() 262 set(${out_var} ${archs} PARENT_SCOPE) 263 endfunction() 264 265 option(COMPILER_RT_DEBUG "Build runtimes with full debug info" OFF) 266 # COMPILER_RT_DEBUG_PYBOOL is used by lit.common.configured.in. 267 pythonize_bool(COMPILER_RT_DEBUG) 268 269 option(COMPILER_RT_BUILD_SHARED_ASAN "Build shared version of AddressSanitizer runtime" OFF) 270 271 #================================ 272 # Setup Compiler Flags 273 #================================ 274 include(config-ix) 275 276 if(MSVC) 277 append_string_if(COMPILER_RT_HAS_W3_FLAG /W3 CMAKE_C_FLAGS CMAKE_CXX_FLAGS) 278 else() 279 append_string_if(COMPILER_RT_HAS_WALL_FLAG -Wall CMAKE_C_FLAGS CMAKE_CXX_FLAGS) 280 endif() 281 if(COMPILER_RT_ENABLE_WERROR) 282 append_string_if(COMPILER_RT_HAS_WERROR_FLAG -Werror CMAKE_C_FLAGS CMAKE_CXX_FLAGS) 283 append_string_if(COMPILER_RT_HAS_WX_FLAG /WX CMAKE_C_FLAGS CMAKE_CXX_FLAGS) 284 endif() 285 286 append_string_if(COMPILER_RT_HAS_STD_CXX11_FLAG -std=c++11 CMAKE_CXX_FLAGS) 287 288 # Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP. 289 if(NOT COMPILER_RT_HAS_FUNC_SYMBOL) 290 add_definitions(-D__func__=__FUNCTION__) 291 endif() 292 293 # Provide some common commmandline flags for Sanitizer runtimes. 294 append_if(COMPILER_RT_HAS_FPIC_FLAG -fPIC SANITIZER_COMMON_CFLAGS) 295 append_if(COMPILER_RT_HAS_FNO_BUILTIN_FLAG -fno-builtin SANITIZER_COMMON_CFLAGS) 296 append_if(COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions SANITIZER_COMMON_CFLAGS) 297 append_if(COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG -fomit-frame-pointer SANITIZER_COMMON_CFLAGS) 298 append_if(COMPILER_RT_HAS_FUNWIND_TABLES_FLAG -funwind-tables SANITIZER_COMMON_CFLAGS) 299 append_if(COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG -fno-stack-protector SANITIZER_COMMON_CFLAGS) 300 append_if(COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG -fvisibility=hidden SANITIZER_COMMON_CFLAGS) 301 append_if(COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG -fno-function-sections SANITIZER_COMMON_CFLAGS) 302 303 if(MSVC) 304 # Remove /MD flag so that it doesn't conflict with /MT. 305 if(COMPILER_RT_HAS_MT_FLAG) 306 string(REGEX REPLACE "(^| ) */MDd? *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 307 list(APPEND SANITIZER_COMMON_CFLAGS /MT) 308 endif() 309 append_if(COMPILER_RT_HAS_Oy_FLAG /Oy- SANITIZER_COMMON_CFLAGS) 310 append_if(COMPILER_RT_HAS_GS_FLAG /GS- SANITIZER_COMMON_CFLAGS) 311 endif() 312 313 # Build with optimization, unless we're in debug mode. If we're using MSVC, 314 # always respect the optimization flags set by CMAKE_BUILD_TYPE instead. 315 if(NOT COMPILER_RT_DEBUG AND NOT MSVC) 316 list(APPEND SANITIZER_COMMON_CFLAGS -O3) 317 endif() 318 319 # Build sanitizer runtimes with debug info. 320 if(COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG) 321 list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only) 322 elseif(COMPILER_RT_HAS_G_FLAG) 323 list(APPEND SANITIZER_COMMON_CFLAGS -g) 324 elseif(COMPILER_RT_HAS_Zi_FLAG) 325 list(APPEND SANITIZER_COMMON_CFLAGS /Zi) 326 endif() 327 328 # Turn off several warnings. 329 append_if(COMPILER_RT_HAS_WNO_GNU_FLAG -Wno-gnu SANITIZER_COMMON_CFLAGS) 330 append_if(COMPILER_RT_HAS_WNO_VARIADIC_MACROS_FLAG -Wno-variadic-macros SANITIZER_COMMON_CFLAGS) 331 append_if(COMPILER_RT_HAS_WNO_C99_EXTENSIONS_FLAG -Wno-c99-extensions SANITIZER_COMMON_CFLAGS) 332 append_if(COMPILER_RT_HAS_WNO_NON_VIRTUAL_DTOR_FLAG -Wno-non-virtual-dtor SANITIZER_COMMON_CFLAGS) 333 append_if(COMPILER_RT_HAS_WD4722_FLAG /wd4722 SANITIZER_COMMON_CFLAGS) 334 335 if(APPLE) 336 # Obtain the iOS Simulator SDK path from xcodebuild. 337 execute_process( 338 COMMAND xcodebuild -version -sdk iphonesimulator Path 339 OUTPUT_VARIABLE IOSSIM_SDK_DIR 340 OUTPUT_STRIP_TRAILING_WHITESPACE 341 ) 342 string(REGEX MATCH "-mmacosx-version-min=" 343 MACOSX_VERSION_MIN_FLAG "${CMAKE_CXX_FLAGS}") 344 set(SANITIZER_COMMON_SUPPORTED_DARWIN_OS osx) 345 if (IOSSIM_SDK_DIR AND NOT MACOSX_VERSION_MIN_FLAG) 346 list(APPEND SANITIZER_COMMON_SUPPORTED_DARWIN_OS iossim) 347 endif() 348 349 if(COMPILER_RT_USES_LIBCXX) 350 set(SANITIZER_MIN_OSX_VERSION 10.7) 351 else() 352 set(SANITIZER_MIN_OSX_VERSION 10.6) 353 endif() 354 set(DARWIN_osx_CFLAGS -mmacosx-version-min=${SANITIZER_MIN_OSX_VERSION}) 355 set(DARWIN_iossim_CFLAGS 356 -mios-simulator-version-min=7.0 -isysroot ${IOSSIM_SDK_DIR}) 357 set(DARWIN_osx_LINKFLAGS) 358 set(DARWIN_iossim_LINKFLAGS 359 -Wl,-ios_simulator_version_min,7.0.0 360 -mios-simulator-version-min=7.0 361 -isysroot ${IOSSIM_SDK_DIR}) 362 endif() 363 364 # Architectures supported by Sanitizer runtimes. Specific sanitizers may 365 # support only subset of these (e.g. TSan works on x86_64 only). 366 filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH 367 x86_64 i386 powerpc64 arm aarch64 mips) 368 filter_available_targets(ASAN_SUPPORTED_ARCH x86_64 i386 powerpc64 arm mips) 369 filter_available_targets(DFSAN_SUPPORTED_ARCH x86_64) 370 filter_available_targets(LSAN_SUPPORTED_ARCH x86_64) 371 filter_available_targets(MSAN_SUPPORTED_ARCH x86_64) 372 filter_available_targets(PROFILE_SUPPORTED_ARCH x86_64 i386 arm aarch64) 373 filter_available_targets(TSAN_SUPPORTED_ARCH x86_64) 374 filter_available_targets(UBSAN_SUPPORTED_ARCH x86_64 i386 arm aarch64) 375 376 add_subdirectory(include) 377 378 set(COMPILER_RT_LIBCXX_PATH ${LLVM_MAIN_SRC_DIR}/projects/libcxx) 379 if(EXISTS ${COMPILER_RT_LIBCXX_PATH}/) 380 set(COMPILER_RT_HAS_LIBCXX_SOURCES TRUE) 381 else() 382 set(COMPILER_RT_HAS_LIBCXX_SOURCES FALSE) 383 endif() 384 385 add_subdirectory(lib) 386 387 if(COMPILER_RT_INCLUDE_TESTS) 388 add_subdirectory(unittests) 389 endif() 390 add_subdirectory(test) 391
