1# See www/CMake.html for instructions on how to build libcxxabi with CMake. 2 3#=============================================================================== 4# Setup Project 5#=============================================================================== 6 7cmake_minimum_required(VERSION 3.13.4) 8 9set(LLVM_COMMON_CMAKE_UTILS "${CMAKE_CURRENT_SOURCE_DIR}/../cmake") 10 11# Add path for custom modules 12list(INSERT CMAKE_MODULE_PATH 0 13 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 14 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 15 "${LLVM_COMMON_CMAKE_UTILS}" 16 "${LLVM_COMMON_CMAKE_UTILS}/Modules" 17 ) 18 19set(CMAKE_FOLDER "libc++") 20 21set(LIBCXXABI_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) 22set(LIBCXXABI_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) 23set(LIBCXXABI_LIBCXX_PATH "${CMAKE_CURRENT_LIST_DIR}/../libcxx" CACHE PATH 24 "Specify path to libc++ source.") 25 26include(GNUInstallDirs) 27 28# Require out of source build. 29include(MacroEnsureOutOfSourceBuild) 30MACRO_ENSURE_OUT_OF_SOURCE_BUILD( 31 "${PROJECT_NAME} requires an out of source build. Please create a separate 32 build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there." 33 ) 34 35#=============================================================================== 36# Setup CMake Options 37#=============================================================================== 38include(CMakeDependentOption) 39include(HandleCompilerRT) 40 41# Define options. 42option(LIBCXXABI_ENABLE_EXCEPTIONS 43 "Provide support for exceptions in the runtime. 44 When disabled, libc++abi does not support stack unwinding and other exceptions-related features." ON) 45option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON) 46option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." ON) 47option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) 48option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF) 49option(LIBCXXABI_ENABLE_STATIC_UNWINDER "Statically link the LLVM unwinder." OFF) 50option(LIBCXXABI_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF) 51option(LIBCXXABI_ENABLE_THREADS "Build with threads enabled" ON) 52option(LIBCXXABI_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF) 53option(LIBCXXABI_HAS_WIN32_THREAD_API "Ignore auto-detection and force use of win32 thread API" OFF) 54option(LIBCXXABI_HAS_EXTERNAL_THREAD_API 55 "Build libc++abi with an externalized threading API. 56 This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON." OFF) 57option(LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY 58 "Build libc++abi with an externalized threading library. 59 This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON" OFF) 60option(LIBCXXABI_ENABLE_FORGIVING_DYNAMIC_CAST 61"Make dynamic_cast more forgiving when type_info's mistakenly have hidden \ 62visibility, and thus multiple type_infos can exist for a single type. \ 63When the dynamic_cast would normally fail, this option will cause the \ 64library to try comparing the type_info names to see if they are equal \ 65instead." OFF) 66 67option(LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS 68 "Build libc++abi with definitions for operator new/delete. These are normally 69 defined in libc++abi, but it is also possible to define them in libc++, in 70 which case the definition in libc++abi should be turned off." ON) 71option(LIBCXXABI_BUILD_32_BITS "Build 32 bit multilib libc++abi. This option is not supported anymore when building the runtimes. Please specify a full triple instead." ${LLVM_BUILD_32_BITS}) 72if (LIBCXXABI_BUILD_32_BITS) 73 message(FATAL_ERROR "LIBCXXABI_BUILD_32_BITS is not supported anymore when building the runtimes, please specify a full triple instead.") 74endif() 75 76option(LIBCXXABI_INCLUDE_TESTS "Generate build targets for the libc++abi unit tests." ${LLVM_INCLUDE_TESTS}) 77set(LIBCXXABI_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING 78 "Define suffix of library directory name (32/64)") 79option(LIBCXXABI_INSTALL_HEADERS "Install the libc++abi headers." ON) 80option(LIBCXXABI_INSTALL_LIBRARY "Install the libc++abi library." ON) 81 82set(LIBCXXABI_SHARED_OUTPUT_NAME "c++abi" CACHE STRING "Output name for the shared libc++abi runtime library.") 83set(LIBCXXABI_STATIC_OUTPUT_NAME "c++abi" CACHE STRING "Output name for the static libc++abi runtime library.") 84 85set(LIBCXXABI_INSTALL_INCLUDE_DIR "${CMAKE_INSTALL_INCLUDEDIR}/c++/v1" CACHE PATH "Path to install the libc++abi headers at.") 86 87if(LLVM_LIBRARY_OUTPUT_INTDIR) 88 set(LIBCXXABI_GENERATED_INCLUDE_DIR "${LLVM_BINARY_DIR}/include/c++/v1") 89else() 90 set(LIBCXXABI_GENERATED_INCLUDE_DIR "${CMAKE_BINARY_DIR}/include/c++/v1") 91endif() 92 93# TODO: Remove this after branching for LLVM 15 94if(LIBCXXABI_SYSROOT OR LIBCXXABI_TARGET_TRIPLE OR LIBCXXABI_GCC_TOOLCHAIN) 95 message(WARNING "LIBCXXABI_SYSROOT, LIBCXXABI_TARGET_TRIPLE and LIBCXXABI_GCC_TOOLCHAIN are not supported anymore, please use the native CMake equivalents instead") 96endif() 97 98set(LIBCXXABI_LIBCXX_LIBRARY_PATH "" CACHE PATH "The path to libc++ library.") 99set(LIBCXXABI_LIBRARY_VERSION "1.0" CACHE STRING 100"Version of libc++abi. This will be reflected in the name of the shared \ 101library produced. For example, -DLIBCXXABI_LIBRARY_VERSION=x.y will \ 102result in the library being named libc++abi.x.y.dylib, along with the \ 103usual symlinks pointing to that.") 104 105# Default to building a shared library so that the default options still test 106# the libc++abi that is being built. The problem with testing a static libc++abi 107# is that libc++ will prefer a dynamic libc++abi from the system over a static 108# libc++abi from the output directory. 109option(LIBCXXABI_ENABLE_SHARED "Build libc++abi as a shared library." ON) 110option(LIBCXXABI_ENABLE_STATIC "Build libc++abi as a static library." ON) 111 112cmake_dependent_option(LIBCXXABI_INSTALL_STATIC_LIBRARY 113 "Install the static libc++abi library." ON 114 "LIBCXXABI_ENABLE_STATIC;LIBCXXABI_INSTALL_LIBRARY" OFF) 115cmake_dependent_option(LIBCXXABI_INSTALL_SHARED_LIBRARY 116 "Install the shared libc++abi library." ON 117 "LIBCXXABI_ENABLE_SHARED;LIBCXXABI_INSTALL_LIBRARY" OFF) 118 119cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY 120 "Statically link the LLVM unwinder to static library" ON 121 "LIBCXXABI_ENABLE_STATIC_UNWINDER" OFF) 122cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY 123 "Statically link the LLVM unwinder to shared library" ON 124 "LIBCXXABI_ENABLE_STATIC_UNWINDER" OFF) 125 126option(LIBCXXABI_BAREMETAL "Build libc++abi for baremetal targets." OFF) 127# The default terminate handler attempts to demangle uncaught exceptions, which 128# causes extra I/O and demangling code to be pulled in. 129option(LIBCXXABI_SILENT_TERMINATE "Set this to make the terminate handler default to a silent alternative" OFF) 130option(LIBCXXABI_NON_DEMANGLING_TERMINATE "Set this to make the terminate handler 131avoid demangling" OFF) 132 133if (NOT LIBCXXABI_ENABLE_SHARED AND NOT LIBCXXABI_ENABLE_STATIC) 134 message(FATAL_ERROR "libc++abi must be built as either a shared or static library.") 135endif() 136 137# TODO: Remove this, which shouldn't be necessary since we know we're being built 138# side-by-side with libc++. 139set(LIBCXXABI_LIBCXX_INCLUDES "" CACHE PATH 140 "Specify path to libc++ includes.") 141 142set(LIBCXXABI_HERMETIC_STATIC_LIBRARY_DEFAULT OFF) 143if (WIN32) 144 set(LIBCXXABI_HERMETIC_STATIC_LIBRARY_DEFAULT ON) 145endif() 146option(LIBCXXABI_HERMETIC_STATIC_LIBRARY 147 "Do not export any symbols from the static library." ${LIBCXXABI_HERMETIC_STATIC_LIBRARY_DEFAULT}) 148 149if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU") 150 set(LIBCXXABI_DEFAULT_TEST_CONFIG "llvm-libc++abi-shared-gcc.cfg.in") 151elseif(MINGW) 152 set(LIBCXXABI_DEFAULT_TEST_CONFIG "llvm-libc++abi-mingw.cfg.in") 153elseif(WIN32) # clang-cl 154 if (LIBCXXABI_ENABLE_SHARED) 155 set(LIBCXXABI_DEFAULT_TEST_CONFIG "llvm-libc++abi-shared-clangcl.cfg.in") 156 else() 157 set(LIBCXXABI_DEFAULT_TEST_CONFIG "llvm-libc++abi-static-clangcl.cfg.in") 158 endif() 159else() 160 if (LIBCXXABI_ENABLE_SHARED) 161 set(LIBCXXABI_DEFAULT_TEST_CONFIG "llvm-libc++abi-shared.cfg.in") 162 else() 163 set(LIBCXXABI_DEFAULT_TEST_CONFIG "llvm-libc++abi-static.cfg.in") 164 endif() 165endif() 166set(LIBCXXABI_TEST_CONFIG "${LIBCXXABI_DEFAULT_TEST_CONFIG}" CACHE STRING 167 "The path to the Lit testing configuration to use when running the tests. 168 If a relative path is provided, it is assumed to be relative to '<monorepo>/libcxxabi/test/configs'.") 169if (NOT IS_ABSOLUTE "${LIBCXXABI_TEST_CONFIG}") 170 set(LIBCXXABI_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/configs/${LIBCXXABI_TEST_CONFIG}") 171endif() 172message(STATUS "Using libc++abi testing configuration: ${LIBCXXABI_TEST_CONFIG}") 173set(LIBCXXABI_TEST_PARAMS "" CACHE STRING 174 "A list of parameters to run the Lit test suite with.") 175 176#=============================================================================== 177# Configure System 178#=============================================================================== 179 180# Add path for custom modules 181set(CMAKE_MODULE_PATH 182 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 183 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 184 ${CMAKE_MODULE_PATH} 185 ) 186 187set(LIBCXXABI_INSTALL_RUNTIME_DIR "${CMAKE_INSTALL_BINDIR}" CACHE PATH 188 "Path where built libc++abi runtime libraries should be installed.") 189 190if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE) 191 set(LIBCXXABI_HEADER_DIR ${LLVM_BINARY_DIR}) 192 set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}) 193 set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE PATH 194 "Path where built libc++abi libraries should be installed.") 195 if(LIBCXX_LIBDIR_SUBDIR) 196 string(APPEND LIBCXXABI_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR}) 197 string(APPEND LIBCXXABI_INSTALL_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR}) 198 endif() 199else() 200 if(LLVM_LIBRARY_OUTPUT_INTDIR) 201 set(LIBCXXABI_HEADER_DIR ${LLVM_BINARY_DIR}) 202 set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}) 203 else() 204 set(LIBCXXABI_HEADER_DIR ${CMAKE_BINARY_DIR}) 205 set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX}) 206 endif() 207 set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LIBCXXABI_LIBDIR_SUFFIX} CACHE PATH 208 "Path where built libc++abi libraries should be installed.") 209endif() 210 211set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 212set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 213set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 214 215# By default, libcxx and libcxxabi share a library directory. 216if (NOT LIBCXXABI_LIBCXX_LIBRARY_PATH) 217 set(LIBCXXABI_LIBCXX_LIBRARY_PATH "${LIBCXXABI_LIBRARY_DIR}" CACHE PATH 218 "The path to libc++ library." FORCE) 219endif() 220 221# Declare libc++abi configuration variables. 222# They are intended for use as follows: 223# LIBCXXABI_C_FLAGS: General flags for both the c++ compiler and linker. 224# LIBCXXABI_CXX_FLAGS: General flags for both the c++ compiler and linker. 225# LIBCXXABI_COMPILE_FLAGS: Compile only flags. 226# LIBCXXABI_LINK_FLAGS: Linker only flags. 227# LIBCXXABI_LIBRARIES: libraries libc++abi is linked to. 228 229set(LIBCXXABI_C_FLAGS "") 230set(LIBCXXABI_CXX_FLAGS "") 231set(LIBCXXABI_COMPILE_FLAGS "") 232set(LIBCXXABI_LINK_FLAGS "") 233set(LIBCXXABI_LIBRARIES "") 234set(LIBCXXABI_ADDITIONAL_COMPILE_FLAGS "" CACHE STRING 235 "Additional Compile only flags which can be provided in cache") 236set(LIBCXXABI_ADDITIONAL_LIBRARIES "" CACHE STRING 237 "Additional libraries libc++abi is linked to which can be provided in cache") 238 239# Include macros for adding and removing libc++abi flags. 240include(HandleLibcxxabiFlags) 241 242#=============================================================================== 243# Setup Compiler Flags 244#=============================================================================== 245 246# Configure target flags 247if(ZOS) 248 add_target_flags_if_supported("-fzos-le-char-mode=ebcdic") 249endif() 250 251if (${CMAKE_SYSTEM_NAME} MATCHES "AIX") 252 add_target_flags_if_supported("-mdefault-visibility-export-mapping=explicit") 253 set(CMAKE_AIX_EXPORT_ALL_SYMBOLS OFF) 254endif() 255add_compile_flags("${LIBCXXABI_ADDITIONAL_COMPILE_FLAGS}") 256add_library_flags("${LIBCXXABI_ADDITIONAL_LIBRARIES}") 257 258# Configure compiler. Must happen after setting the target flags. 259include(config-ix) 260 261if (CXX_SUPPORTS_NOSTDINCXX_FLAG) 262 list(APPEND LIBCXXABI_COMPILE_FLAGS -nostdinc++) 263 # cmake 3.14 and above remove system include paths that are explicitly 264 # passed on the command line. We build with -nostdinc++ and explicitly add 265 # just the libcxx system include paths with -I on the command line. 266 # Setting CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES effectively prevents cmake 267 # from removing these. 268 # See: https://gitlab.kitware.com/cmake/cmake/issues/19227 269 set(CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES "") 270 # Remove -stdlib flags to prevent them from causing an unused flag warning. 271 string(REPLACE "--stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 272 string(REPLACE "--stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 273 string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 274 string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 275endif() 276 277# Let the library headers know they are currently being used to build the 278# library. 279add_definitions(-D_LIBCXXABI_BUILDING_LIBRARY) 280 281# libcxxabi needs to, for various reasons, include the libcpp headers as if 282# it is being built as part of libcxx. 283add_definitions(-D_LIBCPP_BUILDING_LIBRARY) 284 285add_compile_flags_if_supported(-Werror=return-type) 286 287# Get warning flags 288add_compile_flags_if_supported(-W) 289add_compile_flags_if_supported(-Wall) 290add_compile_flags_if_supported(-Wchar-subscripts) 291add_compile_flags_if_supported(-Wconversion) 292add_compile_flags_if_supported(-Wmismatched-tags) 293add_compile_flags_if_supported(-Wmissing-braces) 294add_compile_flags_if_supported(-Wnewline-eof) 295add_compile_flags_if_supported(-Wunused-function) 296add_compile_flags_if_supported(-Wshadow) 297add_compile_flags_if_supported(-Wshorten-64-to-32) 298add_compile_flags_if_supported(-Wsign-compare) 299add_compile_flags_if_supported(-Wsign-conversion) 300add_compile_flags_if_supported(-Wstrict-aliasing=2) 301add_compile_flags_if_supported(-Wstrict-overflow=4) 302add_compile_flags_if_supported(-Wunused-parameter) 303add_compile_flags_if_supported(-Wunused-variable) 304add_compile_flags_if_supported(-Wwrite-strings) 305add_compile_flags_if_supported(-Wundef) 306 307add_compile_flags_if_supported(-Wno-suggest-override) 308 309if (LIBCXXABI_ENABLE_WERROR) 310 add_compile_flags_if_supported(-Werror) 311 add_compile_flags_if_supported(-WX) 312else() 313 add_compile_flags_if_supported(-Wno-error) 314 add_compile_flags_if_supported(-WX-) 315endif() 316if (LIBCXXABI_ENABLE_PEDANTIC) 317 add_compile_flags_if_supported(-pedantic) 318endif() 319 320# Get feature flags. 321add_compile_flags_if_supported(-fstrict-aliasing) 322 323# Exceptions 324if (LIBCXXABI_ENABLE_EXCEPTIONS) 325 # Catches C++ exceptions only and tells the compiler to assume that extern C 326 # functions never throw a C++ exception. 327 add_compile_flags_if_supported(-EHsc) 328 # Do we really need to be run through the C compiler ? 329 add_c_compile_flags_if_supported(-funwind-tables) 330else() 331 add_compile_flags_if_supported(-fno-exceptions) 332 add_compile_flags_if_supported(-EHs-) 333 add_compile_flags_if_supported(-EHa-) 334endif() 335 336# Assert 337string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) 338if (LIBCXXABI_ENABLE_ASSERTIONS) 339 # MSVC doesn't like _DEBUG on release builds. See PR 4379. 340 if (NOT MSVC) 341 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_DEBUG) 342 endif() 343 # On Release builds cmake automatically defines NDEBUG, so we 344 # explicitly undefine it: 345 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 346 list(APPEND LIBCXXABI_COMPILE_FLAGS -UNDEBUG) 347 endif() 348else() 349 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 350 list(APPEND LIBCXXABI_COMPILE_FLAGS -DNDEBUG) 351 endif() 352endif() 353 354# Threading 355if (NOT LIBCXXABI_ENABLE_THREADS) 356 if (LIBCXXABI_HAS_PTHREAD_API) 357 message(FATAL_ERROR "LIBCXXABI_HAS_PTHREAD_API can only" 358 " be set to ON when LIBCXXABI_ENABLE_THREADS" 359 " is also set to ON.") 360 endif() 361 if (LIBCXXABI_HAS_WIN32_THREAD_API) 362 message(FATAL_ERROR "LIBCXXABI_HAS_WIN32_THREAD_API can only" 363 " be set to ON when LIBCXXABI_ENABLE_THREADS" 364 " is also set to ON.") 365 endif() 366 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 367 message(FATAL_ERROR "LIBCXXABI_HAS_EXTERNAL_THREAD_API can only" 368 " be set to ON when LIBCXXABI_ENABLE_THREADS" 369 " is also set to ON.") 370 endif() 371 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 372 message(FATAL_ERROR "LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY can only" 373 " be set to ON when LIBCXXABI_ENABLE_THREADS" 374 " is also set to ON.") 375 endif() 376 add_definitions(-D_LIBCXXABI_HAS_NO_THREADS) 377endif() 378 379if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 380 if (LIBCXXABI_HAS_PTHREAD_API) 381 message(FATAL_ERROR "The options LIBCXXABI_HAS_EXTERNAL_THREAD_API" 382 " and LIBCXXABI_HAS_PTHREAD_API cannot be both" 383 " set to ON at the same time.") 384 endif() 385 if (LIBCXXABI_HAS_WIN32_THREAD_API) 386 message(FATAL_ERROR "The options LIBCXXABI_HAS_EXTERNAL_THREAD_API" 387 " and LIBCXXABI_HAS_WIN32_THREAD_API cannot be both" 388 " set to ON at the same time.") 389 endif() 390 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 391 message(FATAL_ERROR "The options LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY" 392 " and LIBCXXABI_HAS_EXTERNAL_THREAD_API cannot be both" 393 " set to ON at the same time.") 394 endif() 395endif() 396 397if (LIBCXXABI_HAS_PTHREAD_API) 398 if (LIBCXXABI_HAS_WIN32_THREAD_API) 399 message(FATAL_ERROR "The options LIBCXXABI_HAS_PTHREAD_API" 400 "and LIBCXXABI_HAS_WIN32_THREAD_API cannot be both" 401 "set to ON at the same time.") 402 endif() 403endif() 404 405if (LLVM_ENABLE_MODULES) 406 # Ignore that the rest of the modules flags are now unused. 407 add_compile_flags_if_supported(-Wno-unused-command-line-argument) 408 add_compile_flags(-fno-modules) 409endif() 410 411set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS OFF) 412if ((NOT LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS) 413 OR (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXXABI_ENABLE_SHARED) 414 OR MINGW) 415 set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS ON) 416endif() 417 418if (LIBCXXABI_HAS_UNDEFINED_SYMBOLS) 419 # Need to allow unresolved symbols if this is to work with shared library builds 420 if (APPLE) 421 list(APPEND LIBCXXABI_LINK_FLAGS "-undefined dynamic_lookup") 422 else() 423 # Relax this restriction from HandleLLVMOptions 424 string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}") 425 endif() 426endif() 427 428if (LIBCXXABI_HAS_PTHREAD_API) 429 add_definitions(-D_LIBCPP_HAS_THREAD_API_PTHREAD) 430endif() 431 432if (LIBCXXABI_HAS_WIN32_THREAD_API) 433 add_definitions(-D_LIBCPP_HAS_THREAD_API_WIN32) 434endif() 435 436if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 437 add_definitions(-D_LIBCPP_HAS_THREAD_API_EXTERNAL) 438endif() 439 440if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 441 add_definitions(-D_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) 442endif() 443 444if (MSVC) 445 add_definitions(-D_CRT_SECURE_NO_WARNINGS) 446endif() 447 448if (LIBCXXABI_SILENT_TERMINATE) 449 add_definitions(-DLIBCXXABI_SILENT_TERMINATE) 450endif() 451 452if (LIBCXXABI_NON_DEMANGLING_TERMINATE) 453 add_definitions(-DLIBCXXABI_NON_DEMANGLING_TERMINATE) 454endif() 455 456if (LIBCXXABI_BAREMETAL) 457 add_definitions(-DLIBCXXABI_BAREMETAL) 458endif() 459 460if (C_SUPPORTS_COMMENT_LIB_PRAGMA) 461 if (LIBCXXABI_HAS_PTHREAD_LIB) 462 add_definitions(-D_LIBCXXABI_LINK_PTHREAD_LIB) 463 endif() 464endif() 465 466string(REPLACE ";" " " LIBCXXABI_CXX_FLAGS "${LIBCXXABI_CXX_FLAGS}") 467set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FLAGS}") 468set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}") 469 470# On AIX, avoid picking up VMX extensions(i.e. vec_malloc) which would change 471# the default alignment of the allocators here. 472if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX") 473 add_definitions("-D_XOPEN_SOURCE=700") 474endif() 475 476#=============================================================================== 477# Setup Source Code 478#=============================================================================== 479 480set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH 481 "Specify path to libunwind includes." FORCE) 482set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH 483 "Specify path to libunwind source." FORCE) 484 485if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM) 486 find_path(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL libunwind.h 487 PATHS ${LIBCXXABI_LIBUNWIND_INCLUDES} 488 ${LIBCXXABI_LIBUNWIND_PATH}/include 489 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBUNWIND_INCLUDES} 490 ${LLVM_MAIN_SRC_DIR}/projects/libunwind/include 491 ${LLVM_MAIN_SRC_DIR}/runtimes/libunwind/include 492 ${LLVM_MAIN_SRC_DIR}/../libunwind/include 493 NO_DEFAULT_PATH 494 NO_CMAKE_FIND_ROOT_PATH 495 ) 496 497 if (LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL-NOTFOUND") 498 set(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL "") 499 endif() 500 501 if (NOT LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "") 502 include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}") 503 endif() 504endif() 505 506# Add source code. This also contains all of the logic for deciding linker flags 507# soname, etc... 508add_subdirectory(include) 509add_subdirectory(src) 510 511if (LIBCXXABI_INCLUDE_TESTS) 512 add_subdirectory(test) 513 add_subdirectory(fuzz) 514endif() 515