1 # See www/CMake.html for instructions on how to build libcxxabi with CMake. 2 3 #=============================================================================== 4 # Setup Project 5 #=============================================================================== 6 7 cmake_minimum_required(VERSION 3.4.3) 8 9 if(POLICY CMP0042) 10 cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default 11 endif() 12 13 # Add path for custom modules 14 set(CMAKE_MODULE_PATH 15 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 16 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 17 ${CMAKE_MODULE_PATH} 18 ) 19 20 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) 21 project(libcxxabi CXX C) 22 23 set(PACKAGE_NAME libcxxabi) 24 set(PACKAGE_VERSION 8.0.0svn) 25 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") 26 set(PACKAGE_BUGREPORT "llvm-bugs (a] lists.llvm.org") 27 28 # Find the LLVM sources and simulate LLVM CMake options. 29 include(HandleOutOfTreeLLVM) 30 endif() 31 32 # Require out of source build. 33 include(MacroEnsureOutOfSourceBuild) 34 MACRO_ENSURE_OUT_OF_SOURCE_BUILD( 35 "${PROJECT_NAME} requires an out of source build. Please create a separate 36 build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there." 37 ) 38 39 #=============================================================================== 40 # Setup CMake Options 41 #=============================================================================== 42 include(CMakeDependentOption) 43 include(HandleCompilerRT) 44 45 # Define options. 46 option(LIBCXXABI_ENABLE_EXCEPTIONS "Use exceptions." ON) 47 option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON) 48 option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." ON) 49 option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) 50 option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF) 51 option(LIBCXXABI_ENABLE_STATIC_UNWINDER "Statically link the LLVM unwinder." OFF) 52 option(LIBCXXABI_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF) 53 option(LIBCXXABI_ENABLE_THREADS "Build with threads enabled" ON) 54 option(LIBCXXABI_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF) 55 option(LIBCXXABI_HAS_EXTERNAL_THREAD_API 56 "Build libc++abi with an externalized threading API. 57 This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON." OFF) 58 option(LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY 59 "Build libc++abi with an externalized threading library. 60 This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON" OFF) 61 62 # FIXME: This option should default to off. Unfortunatly GCC 4.9 fails to link 63 # programs to due undefined references to new/delete in libc++abi. Once this 64 # has been fixed or worked around the default value should be changed. 65 option(LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS 66 "Build libc++abi with definitions for operator new/delete. Normally libc++ 67 provides these definitions" ON) 68 option(LIBCXXABI_BUILD_32_BITS "Build 32 bit libc++abi." ${LLVM_BUILD_32_BITS}) 69 option(LIBCXXABI_INCLUDE_TESTS "Generate build targets for the libc++abi unit tests." ${LLVM_INCLUDE_TESTS}) 70 set(LIBCXXABI_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING 71 "Define suffix of library directory name (32/64)") 72 option(LIBCXXABI_INSTALL_LIBRARY "Install the libc++abi library." ON) 73 set(LIBCXXABI_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.") 74 set(LIBCXXABI_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.") 75 set(LIBCXXABI_SYSROOT "" CACHE PATH "Sysroot for cross compiling.") 76 set(LIBCXXABI_LIBCXX_LIBRARY_PATH "" CACHE PATH "The path to libc++ library.") 77 78 # Default to building a shared library so that the default options still test 79 # the libc++abi that is being built. There are two problems with testing a 80 # static libc++abi. In the case of a standalone build, the tests will link the 81 # system's libc++, which might not have been built against our libc++abi. In the 82 # case of an in tree build, libc++ will prefer a dynamic libc++abi from the 83 # system over a static libc++abi from the output directory. 84 option(LIBCXXABI_ENABLE_SHARED "Build libc++abi as a shared library." ON) 85 option(LIBCXXABI_ENABLE_STATIC "Build libc++abi as a static library." ON) 86 87 cmake_dependent_option(LIBCXXABI_INSTALL_STATIC_LIBRARY 88 "Install the static libc++abi library." ON 89 "LIBCXXABI_ENABLE_STATIC;LIBCXXABI_INSTALL_LIBRARY" OFF) 90 cmake_dependent_option(LIBCXXABI_INSTALL_SHARED_LIBRARY 91 "Install the shared libc++abi library." ON 92 "LIBCXXABI_ENABLE_SHARED;LIBCXXABI_INSTALL_LIBRARY" OFF) 93 94 cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY 95 "Statically link the LLVM unwinder to static library" ON 96 "LIBCXXABI_ENABLE_STATIC_UNWINDER;LIBCXXABI_ENABLE_STATIC" OFF) 97 cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY 98 "Statically link the LLVM unwinder to shared library" ON 99 "LIBCXXABI_ENABLE_STATIC_UNWINDER;LIBCXXABI_ENABLE_SHARED" OFF) 100 101 option(LIBCXXABI_BAREMETAL "Build libc++abi for baremetal targets." OFF) 102 # The default terminate handler attempts to demangle uncaught exceptions, which 103 # causes extra I/O and demangling code to be pulled in. 104 option(LIBCXXABI_SILENT_TERMINATE "Set this to make the terminate handler default to a silent alternative" OFF) 105 106 if (NOT LIBCXXABI_ENABLE_SHARED AND NOT LIBCXXABI_ENABLE_STATIC) 107 message(FATAL_ERROR "libc++abi must be built as either a shared or static library.") 108 endif() 109 110 if (LLVM_EXTERNAL_LIBCXX_SOURCE_DIR) 111 set(LIBCXXABI_LIBCXX_SRC_DIRS ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR}) 112 else() 113 set(LIBCXXABI_LIBCXX_SRC_DIRS 114 "${LLVM_MAIN_SRC_DIR}/projects/libcxx" 115 "${LLVM_MAIN_SRC_DIR}/runtimes/libcxx" 116 "${LLVM_MAIN_SRC_DIR}/../libcxx" 117 ) 118 endif() 119 120 set(LIBCXXABI_LIBCXX_INCLUDE_DIRS "") 121 foreach(dir ${LIBCXXABI_LIBCXX_SRC_DIRS}) 122 list(APPEND LIBCXXABI_LIBCXX_INCLUDE_DIRS "${dir}/include") 123 endforeach() 124 125 find_path( 126 LIBCXXABI_LIBCXX_INCLUDES 127 __config 128 PATHS ${LIBCXXABI_LIBCXX_INCLUDES} 129 ${LIBCXXABI_LIBCXX_PATH}/include 130 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBCXX_INCLUDES} 131 ${LIBCXXABI_LIBCXX_INCLUDE_DIRS} 132 ${LLVM_INCLUDE_DIR}/c++/v1 133 NO_DEFAULT_PATH 134 NO_CMAKE_FIND_ROOT_PATH 135 ) 136 137 set(LIBCXXABI_LIBCXX_INCLUDES "${LIBCXXABI_LIBCXX_INCLUDES}" CACHE PATH 138 "Specify path to libc++ includes." FORCE) 139 140 find_path( 141 LIBCXXABI_LIBCXX_PATH 142 utils/libcxx/test/__init__.py 143 PATHS ${LIBCXXABI_LIBCXX_PATH} 144 ${LIBCXXABI_LIBCXX_INCLUDES}/../ 145 ${LIBCXXABI_LIBCXX_SRC_DIRS} 146 NO_DEFAULT_PATH 147 NO_CMAKE_FIND_ROOT_PATH 148 ) 149 150 if (LIBCXXABI_LIBCXX_PATH STREQUAL "LIBCXXABI_LIBCXX_PATH-NOTFOUND") 151 message(WARNING "LIBCXXABI_LIBCXX_PATH was not specified and couldn't be infered.") 152 set(LIBCXXABI_LIBCXX_PATH "") 153 endif() 154 155 set(LIBCXXABI_LIBCXX_PATH "${LIBCXXABI_LIBCXX_PATH}" CACHE PATH 156 "Specify path to libc++ source." FORCE) 157 158 #=============================================================================== 159 # Configure System 160 #=============================================================================== 161 162 # Add path for custom modules 163 set(CMAKE_MODULE_PATH 164 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 165 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 166 ${CMAKE_MODULE_PATH} 167 ) 168 169 set(LIBCXXABI_COMPILER ${CMAKE_CXX_COMPILER}) 170 set(LIBCXXABI_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) 171 set(LIBCXXABI_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) 172 173 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION 174 ${PACKAGE_VERSION}) 175 176 if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE) 177 set(DEFAULT_INSTALL_PREFIX lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/${LLVM_DEFAULT_TARGET_TRIPLE}/) 178 set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION}/${LLVM_DEFAULT_TARGET_TRIPLE}/lib${LIBCXXABI_LIBDIR_SUFFIX}) 179 elseif(LLVM_LIBRARY_OUTPUT_INTDIR) 180 set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}) 181 else() 182 set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX}) 183 endif() 184 185 set(LIBCXXABI_INSTALL_PREFIX ${DEFAULT_INSTALL_PREFIX} CACHE STRING 186 "Define libc++abi destination prefix.") 187 188 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 189 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 190 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 191 192 # By default, for non-standalone builds, libcxx and libcxxabi share a library 193 # directory. 194 if (NOT LIBCXXABI_LIBCXX_LIBRARY_PATH) 195 set(LIBCXXABI_LIBCXX_LIBRARY_PATH "${LIBCXXABI_LIBRARY_DIR}" CACHE PATH 196 "The path to libc++ library.") 197 endif() 198 199 # Check that we can build with 32 bits if requested. 200 if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32) 201 if (LIBCXXABI_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM 202 message(STATUS "Building 32 bits executables and libraries.") 203 endif() 204 elseif(LIBCXXABI_BUILD_32_BITS) 205 message(FATAL_ERROR "LIBCXXABI_BUILD_32_BITS=ON is not supported on this platform.") 206 endif() 207 208 # Declare libc++abi configuration variables. 209 # They are intended for use as follows: 210 # LIBCXXABI_C_FLAGS: General flags for both the c++ compiler and linker. 211 # LIBCXXABI_CXX_FLAGS: General flags for both the c++ compiler and linker. 212 # LIBCXXABI_COMPILE_FLAGS: Compile only flags. 213 # LIBCXXABI_LINK_FLAGS: Linker only flags. 214 # LIBCXXABI_LIBRARIES: libraries libc++abi is linked to. 215 216 set(LIBCXXABI_C_FLAGS "") 217 set(LIBCXXABI_CXX_FLAGS "") 218 set(LIBCXXABI_COMPILE_FLAGS "") 219 set(LIBCXXABI_LINK_FLAGS "") 220 set(LIBCXXABI_LIBRARIES "") 221 222 # Include macros for adding and removing libc++abi flags. 223 include(HandleLibcxxabiFlags) 224 225 #=============================================================================== 226 # Setup Compiler Flags 227 #=============================================================================== 228 229 # Configure target flags 230 add_target_flags_if(LIBCXXABI_BUILD_32_BITS "-m32") 231 add_target_flags_if(LIBCXXABI_TARGET_TRIPLE 232 "--target=${LIBCXXABI_TARGET_TRIPLE}") 233 add_target_flags_if(LIBCXXABI_GCC_TOOLCHAIN 234 "--gcc-toolchain=${LIBCXXABI_GCC_TOOLCHAIN}") 235 add_target_flags_if(LIBCXXABI_SYSROOT 236 "--sysroot=${LIBCXXABI_SYSROOT}") 237 238 if (LIBCXXABI_TARGET_TRIPLE) 239 set(TARGET_TRIPLE "${LIBCXXABI_TARGET_TRIPLE}") 240 endif() 241 242 # Configure compiler. Must happen after setting the target flags. 243 include(config-ix) 244 245 if (LIBCXXABI_HAS_NOSTDINCXX_FLAG) 246 list(APPEND LIBCXXABI_COMPILE_FLAGS -nostdinc++) 247 # Remove -stdlib flags to prevent them from causing an unused flag warning. 248 string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 249 string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 250 endif() 251 252 if (LIBCXXABI_USE_COMPILER_RT) 253 list(APPEND LIBCXXABI_LINK_FLAGS "-rtlib=compiler-rt") 254 endif() 255 256 # Let the library headers know they are currently being used to build the 257 # library. 258 add_definitions(-D_LIBCXXABI_BUILDING_LIBRARY) 259 260 # Disable DLL annotations on Windows for static builds. 261 if (WIN32 AND LIBCXXABI_ENABLE_STATIC AND NOT LIBCXXABI_ENABLE_SHARED) 262 add_definitions(-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS) 263 endif() 264 265 add_compile_flags_if_supported(-Werror=return-type) 266 267 # Get warning flags 268 add_compile_flags_if_supported(-W) 269 add_compile_flags_if_supported(-Wall) 270 add_compile_flags_if_supported(-Wchar-subscripts) 271 add_compile_flags_if_supported(-Wconversion) 272 add_compile_flags_if_supported(-Wmismatched-tags) 273 add_compile_flags_if_supported(-Wmissing-braces) 274 add_compile_flags_if_supported(-Wnewline-eof) 275 add_compile_flags_if_supported(-Wunused-function) 276 add_compile_flags_if_supported(-Wshadow) 277 add_compile_flags_if_supported(-Wshorten-64-to-32) 278 add_compile_flags_if_supported(-Wsign-compare) 279 add_compile_flags_if_supported(-Wsign-conversion) 280 add_compile_flags_if_supported(-Wstrict-aliasing=2) 281 add_compile_flags_if_supported(-Wstrict-overflow=4) 282 add_compile_flags_if_supported(-Wunused-parameter) 283 add_compile_flags_if_supported(-Wunused-variable) 284 add_compile_flags_if_supported(-Wwrite-strings) 285 add_compile_flags_if_supported(-Wundef) 286 287 if (LIBCXXABI_ENABLE_WERROR) 288 add_compile_flags_if_supported(-Werror) 289 add_compile_flags_if_supported(-WX) 290 else() 291 add_compile_flags_if_supported(-Wno-error) 292 add_compile_flags_if_supported(-WX-) 293 endif() 294 if (LIBCXXABI_ENABLE_PEDANTIC) 295 add_compile_flags_if_supported(-pedantic) 296 endif() 297 298 # Get feature flags. 299 add_compile_flags_if_supported(-fstrict-aliasing) 300 301 # Exceptions 302 if (LIBCXXABI_ENABLE_EXCEPTIONS) 303 # Catches C++ exceptions only and tells the compiler to assume that extern C 304 # functions never throw a C++ exception. 305 add_compile_flags_if_supported(-EHsc) 306 # Do we really need to be run through the C compiler ? 307 add_c_compile_flags_if_supported(-funwind-tables) 308 else() 309 add_definitions(-D_LIBCXXABI_NO_EXCEPTIONS) 310 add_compile_flags_if_supported(-fno-exceptions) 311 add_compile_flags_if_supported(-EHs-) 312 add_compile_flags_if_supported(-EHa-) 313 endif() 314 315 # Assert 316 string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) 317 if (LIBCXXABI_ENABLE_ASSERTIONS) 318 # MSVC doesn't like _DEBUG on release builds. See PR 4379. 319 if (NOT MSVC) 320 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_DEBUG) 321 endif() 322 # On Release builds cmake automatically defines NDEBUG, so we 323 # explicitly undefine it: 324 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 325 list(APPEND LIBCXXABI_COMPILE_FLAGS -UNDEBUG) 326 endif() 327 else() 328 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 329 list(APPEND LIBCXXABI_COMPILE_FLAGS -DNDEBUG) 330 endif() 331 endif() 332 # Static library 333 if (NOT LIBCXXABI_ENABLE_SHARED) 334 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_LIBCPP_BUILD_STATIC) 335 endif() 336 337 # Threading 338 if (NOT LIBCXXABI_ENABLE_THREADS) 339 if (LIBCXXABI_HAS_PTHREAD_API) 340 message(FATAL_ERROR "LIBCXXABI_HAS_PTHREAD_API can only" 341 " be set to ON when LIBCXXABI_ENABLE_THREADS" 342 " is also set to ON.") 343 endif() 344 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 345 message(FATAL_ERROR "LIBCXXABI_HAS_EXTERNAL_THREAD_API can only" 346 " be set to ON when LIBCXXABI_ENABLE_THREADS" 347 " is also set to ON.") 348 endif() 349 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 350 message(FATAL_ERROR "LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY can only" 351 " be set to ON when LIBCXXABI_ENABLE_THREADS" 352 " is also set to ON.") 353 endif() 354 add_definitions(-D_LIBCXXABI_HAS_NO_THREADS) 355 endif() 356 357 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 358 if (LIBCXXABI_HAS_PTHREAD_API) 359 message(FATAL_ERROR "The options LIBCXXABI_HAS_EXTERNAL_THREAD_API" 360 " and LIBCXXABI_HAS_PTHREAD_API cannot be both" 361 " set to ON at the same time.") 362 endif() 363 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 364 message(FATAL_ERROR "The options LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY" 365 " and LIBCXXABI_HAS_EXTERNAL_THREAD_API cannot be both" 366 " set to ON at the same time.") 367 endif() 368 endif() 369 370 if (LLVM_ENABLE_MODULES) 371 # Ignore that the rest of the modules flags are now unused. 372 add_compile_flags_if_supported(-Wno-unused-command-line-argument) 373 add_compile_flags(-fno-modules) 374 endif() 375 376 set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS OFF) 377 if ((NOT LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS) 378 OR (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXXABI_ENABLE_SHARED) 379 OR MINGW) 380 set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS ON) 381 endif() 382 383 if (LIBCXXABI_HAS_UNDEFINED_SYMBOLS) 384 # Need to allow unresolved symbols if this is to work with shared library builds 385 if (APPLE) 386 list(APPEND LIBCXXABI_LINK_FLAGS "-undefined dynamic_lookup") 387 else() 388 # Relax this restriction from HandleLLVMOptions 389 string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}") 390 endif() 391 endif() 392 393 if (LIBCXXABI_HAS_PTHREAD_API) 394 add_definitions(-D_LIBCPP_HAS_THREAD_API_PTHREAD) 395 endif() 396 397 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 398 add_definitions(-D_LIBCPP_HAS_THREAD_API_EXTERNAL) 399 endif() 400 401 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 402 add_definitions(-D_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) 403 endif() 404 405 # Prevent libc++abi from having library dependencies on libc++ 406 add_definitions(-D_LIBCPP_DISABLE_EXTERN_TEMPLATE) 407 408 # Bring back `std::unexpected`, which is removed in C++17, to support 409 # pre-C++17. 410 add_definitions(-D_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS) 411 412 if (MSVC) 413 add_definitions(-D_CRT_SECURE_NO_WARNINGS) 414 endif() 415 416 # Define LIBCXXABI_USE_LLVM_UNWINDER for conditional compilation. 417 if (LIBCXXABI_USE_LLVM_UNWINDER) 418 add_definitions(-DLIBCXXABI_USE_LLVM_UNWINDER) 419 endif() 420 421 if (LIBCXXABI_SILENT_TERMINATE) 422 add_definitions(-DLIBCXXABI_SILENT_TERMINATE) 423 endif() 424 425 if (LIBCXXABI_BAREMETAL) 426 add_definitions(-DLIBCXXABI_BAREMETAL) 427 endif() 428 429 string(REPLACE ";" " " LIBCXXABI_CXX_FLAGS "${LIBCXXABI_CXX_FLAGS}") 430 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FLAGS}") 431 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}") 432 433 #=============================================================================== 434 # Setup Source Code 435 #=============================================================================== 436 437 set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH 438 "Specify path to libunwind includes." FORCE) 439 set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH 440 "Specify path to libunwind source." FORCE) 441 442 include_directories(include) 443 if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM) 444 find_path( 445 LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL 446 libunwind.h 447 PATHS ${LIBCXXABI_LIBUNWIND_INCLUDES} 448 ${LIBCXXABI_LIBUNWIND_PATH}/include 449 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBUNWIND_INCLUDES} 450 ${LLVM_MAIN_SRC_DIR}/projects/libunwind/include 451 ${LLVM_MAIN_SRC_DIR}/runtimes/libunwind/include 452 ${LLVM_MAIN_SRC_DIR}/../libunwind/include 453 NO_DEFAULT_PATH 454 NO_CMAKE_FIND_ROOT_PATH 455 ) 456 457 if (LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL-NOTFOUND") 458 set(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL "") 459 endif() 460 461 if (NOT LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "") 462 include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}") 463 endif() 464 endif() 465 466 # Add source code. This also contains all of the logic for deciding linker flags 467 # soname, etc... 468 add_subdirectory(src) 469 470 if (LIBCXXABI_INCLUDE_TESTS) 471 if (LIBCXXABI_STANDALONE_BUILD AND NOT LIBCXXABI_ENABLE_SHARED) 472 # We can't reasonably test the system C++ library with a static 473 # libc++abi. We either need to be able to replace libc++abi at 474 # run time (with a shared libc++abi), or we need to be able to 475 # replace the C++ runtime (with a non- standalone build). 476 message(WARNING "The libc++abi tests aren't valid when libc++abi " 477 "is built standalone (i.e. outside of " 478 "llvm/projects/libcxxabi ) and is built without " 479 "a shared library. Either build a shared " 480 "library, build libc++abi at the same time as " 481 "you build libc++, or do without testing. No " 482 "check target will be available!") 483 else() 484 add_subdirectory(test) 485 add_subdirectory(fuzz) 486 endif() 487 endif() 488
