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 ${CMAKE_MODULE_PATH} 18 ) 19 20 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) 21 project(libcxxabi CXX C) 22 23 set(PACKAGE_NAME libcxxabi) 24 set(PACKAGE_VERSION 7.0.0svn) 25 set(PACKAGE_STRING "${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 option(LIBCXXABI_BAREMETAL "Build libc++abi for baremetal targets." OFF) 88 # The default terminate handler attempts to demangle uncaught exceptions, which 89 # causes extra I/O and demangling code to be pulled in. 90 option(LIBCXXABI_SILENT_TERMINATE "Set this to make the terminate handler default to a silent alternative" OFF) 91 92 if (NOT LIBCXXABI_ENABLE_SHARED AND NOT LIBCXXABI_ENABLE_STATIC) 93 message(FATAL_ERROR "libc++abi must be built as either a shared or static library.") 94 endif() 95 96 if (LLVM_EXTERNAL_LIBCXX_SOURCE_DIR) 97 set(LIBCXXABI_LIBCXX_SRC_DIRS ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR}) 98 else() 99 set(LIBCXXABI_LIBCXX_SRC_DIRS 100 "${LLVM_MAIN_SRC_DIR}/projects/libcxx" 101 "${LLVM_MAIN_SRC_DIR}/runtimes/libcxx" 102 ) 103 endif() 104 105 set(LIBCXXABI_LIBCXX_INCLUDE_DIRS "") 106 foreach(dir ${LIBCXXABI_LIBCXX_SRC_DIRS}) 107 list(APPEND LIBCXXABI_LIBCXX_INCLUDE_DIRS "${dir}/include") 108 endforeach() 109 110 find_path( 111 LIBCXXABI_LIBCXX_INCLUDES 112 vector 113 PATHS ${LIBCXXABI_LIBCXX_INCLUDES} 114 ${LIBCXXABI_LIBCXX_PATH}/include 115 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBCXX_INCLUDES} 116 ${LIBCXXABI_LIBCXX_INCLUDE_DIRS} 117 ${LLVM_INCLUDE_DIR}/c++/v1 118 NO_CMAKE_FIND_ROOT_PATH 119 ) 120 121 set(LIBCXXABI_LIBCXX_INCLUDES "${LIBCXXABI_LIBCXX_INCLUDES}" CACHE PATH 122 "Specify path to libc++ includes." FORCE) 123 124 find_path( 125 LIBCXXABI_LIBCXX_PATH 126 utils/libcxx/test/__init__.py 127 PATHS ${LIBCXXABI_LIBCXX_PATH} 128 ${LIBCXXABI_LIBCXX_INCLUDES}/../ 129 ${LIBCXXABI_LIBCXX_SRC_DIRS} 130 NO_DEFAULT_PATH 131 NO_CMAKE_FIND_ROOT_PATH 132 ) 133 134 if (LIBCXXABI_LIBCXX_PATH STREQUAL "LIBCXXABI_LIBCXX_PATH-NOTFOUND") 135 message(WARNING "LIBCXXABI_LIBCXX_PATH was not specified and couldn't be infered.") 136 set(LIBCXXABI_LIBCXX_PATH "") 137 endif() 138 139 set(LIBCXXABI_LIBCXX_PATH "${LIBCXXABI_LIBCXX_PATH}" CACHE PATH 140 "Specify path to libc++ source." FORCE) 141 142 #=============================================================================== 143 # Configure System 144 #=============================================================================== 145 146 # Add path for custom modules 147 set(CMAKE_MODULE_PATH 148 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 149 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 150 ${CMAKE_MODULE_PATH} 151 ) 152 153 set(LIBCXXABI_COMPILER ${CMAKE_CXX_COMPILER}) 154 set(LIBCXXABI_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) 155 set(LIBCXXABI_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) 156 if (LLVM_LIBRARY_OUTPUT_INTDIR) 157 set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}) 158 else() 159 set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX}) 160 endif() 161 162 set(LIBCXXABI_INSTALL_PREFIX "" CACHE STRING 163 "Define libc++abi destination prefix.") 164 165 if (NOT LIBCXXABI_INSTALL_PREFIX MATCHES "^$|.*/") 166 message(FATAL_ERROR "LIBCXXABI_INSTALL_PREFIX has to end with \"/\".") 167 endif() 168 169 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 170 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 171 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR}) 172 173 # By default, for non-standalone builds, libcxx and libcxxabi share a library 174 # directory. 175 if (NOT LIBCXXABI_LIBCXX_LIBRARY_PATH) 176 set(LIBCXXABI_LIBCXX_LIBRARY_PATH "${LIBCXXABI_LIBRARY_DIR}" CACHE PATH 177 "The path to libc++ library.") 178 endif() 179 180 # Check that we can build with 32 bits if requested. 181 if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32) 182 if (LIBCXXABI_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM 183 message(STATUS "Building 32 bits executables and libraries.") 184 endif() 185 elseif(LIBCXXABI_BUILD_32_BITS) 186 message(FATAL_ERROR "LIBCXXABI_BUILD_32_BITS=ON is not supported on this platform.") 187 endif() 188 189 # Declare libc++abi configuration variables. 190 # They are intended for use as follows: 191 # LIBCXXABI_C_FLAGS: General flags for both the c++ compiler and linker. 192 # LIBCXXABI_CXX_FLAGS: General flags for both the c++ compiler and linker. 193 # LIBCXXABI_COMPILE_FLAGS: Compile only flags. 194 # LIBCXXABI_LINK_FLAGS: Linker only flags. 195 # LIBCXXABI_LIBRARIES: libraries libc++abi is linked to. 196 197 set(LIBCXXABI_C_FLAGS "") 198 set(LIBCXXABI_CXX_FLAGS "") 199 set(LIBCXXABI_COMPILE_FLAGS "") 200 set(LIBCXXABI_LINK_FLAGS "") 201 set(LIBCXXABI_LIBRARIES "") 202 203 # Include macros for adding and removing libc++abi flags. 204 include(HandleLibcxxabiFlags) 205 206 #=============================================================================== 207 # Setup Compiler Flags 208 #=============================================================================== 209 210 # Configure target flags 211 add_target_flags_if(LIBCXXABI_BUILD_32_BITS "-m32") 212 add_target_flags_if(LIBCXXABI_TARGET_TRIPLE 213 "--target=${LIBCXXABI_TARGET_TRIPLE}") 214 add_target_flags_if(LIBCXXABI_GCC_TOOLCHAIN 215 "--gcc-toolchain=${LIBCXXABI_GCC_TOOLCHAIN}") 216 add_target_flags_if(LIBCXXABI_SYSROOT 217 "--sysroot=${LIBCXXABI_SYSROOT}") 218 219 if (LIBCXXABI_TARGET_TRIPLE) 220 set(TARGET_TRIPLE "${LIBCXXABI_TARGET_TRIPLE}") 221 endif() 222 223 # Configure compiler. Must happen after setting the target flags. 224 include(config-ix) 225 226 if (LIBCXXABI_HAS_NOSTDINCXX_FLAG) 227 list(APPEND LIBCXXABI_COMPILE_FLAGS -nostdinc++) 228 # Remove -stdlib flags to prevent them from causing an unused flag warning. 229 string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 230 string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 231 endif() 232 233 if (LIBCXXABI_USE_COMPILER_RT) 234 list(APPEND LIBCXXABI_LINK_FLAGS "-rtlib=compiler-rt") 235 endif() 236 237 # Let the library headers know they are currently being used to build the 238 # library. 239 add_definitions(-D_LIBCXXABI_BUILDING_LIBRARY) 240 241 # Disable DLL annotations on Windows for static builds. 242 if (WIN32 AND LIBCXXABI_ENABLE_STATIC AND NOT LIBCXXABI_ENABLE_SHARED) 243 add_definitions(-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS) 244 endif() 245 246 add_compile_flags_if_supported(-Werror=return-type) 247 248 # Get warning flags 249 add_compile_flags_if_supported(-W) 250 add_compile_flags_if_supported(-Wall) 251 add_compile_flags_if_supported(-Wchar-subscripts) 252 add_compile_flags_if_supported(-Wconversion) 253 add_compile_flags_if_supported(-Wmismatched-tags) 254 add_compile_flags_if_supported(-Wmissing-braces) 255 add_compile_flags_if_supported(-Wnewline-eof) 256 add_compile_flags_if_supported(-Wunused-function) 257 add_compile_flags_if_supported(-Wshadow) 258 add_compile_flags_if_supported(-Wshorten-64-to-32) 259 add_compile_flags_if_supported(-Wsign-compare) 260 add_compile_flags_if_supported(-Wsign-conversion) 261 add_compile_flags_if_supported(-Wstrict-aliasing=2) 262 add_compile_flags_if_supported(-Wstrict-overflow=4) 263 add_compile_flags_if_supported(-Wunused-parameter) 264 add_compile_flags_if_supported(-Wunused-variable) 265 add_compile_flags_if_supported(-Wwrite-strings) 266 add_compile_flags_if_supported(-Wundef) 267 268 if (LIBCXXABI_ENABLE_WERROR) 269 add_compile_flags_if_supported(-Werror) 270 add_compile_flags_if_supported(-WX) 271 else() 272 add_compile_flags_if_supported(-Wno-error) 273 add_compile_flags_if_supported(-WX-) 274 endif() 275 if (LIBCXXABI_ENABLE_PEDANTIC) 276 add_compile_flags_if_supported(-pedantic) 277 endif() 278 279 # Get feature flags. 280 add_compile_flags_if_supported(-fstrict-aliasing) 281 282 # Exceptions 283 if (LIBCXXABI_ENABLE_EXCEPTIONS) 284 # Catches C++ exceptions only and tells the compiler to assume that extern C 285 # functions never throw a C++ exception. 286 add_compile_flags_if_supported(-EHsc) 287 # Do we really need to be run through the C compiler ? 288 add_c_compile_flags_if_supported(-funwind-tables) 289 else() 290 add_definitions(-D_LIBCXXABI_NO_EXCEPTIONS) 291 add_compile_flags_if_supported(-fno-exceptions) 292 add_compile_flags_if_supported(-EHs-) 293 add_compile_flags_if_supported(-EHa-) 294 endif() 295 296 # Assert 297 string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) 298 if (LIBCXXABI_ENABLE_ASSERTIONS) 299 # MSVC doesn't like _DEBUG on release builds. See PR 4379. 300 if (NOT MSVC) 301 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_DEBUG) 302 endif() 303 # On Release builds cmake automatically defines NDEBUG, so we 304 # explicitly undefine it: 305 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 306 list(APPEND LIBCXXABI_COMPILE_FLAGS -UNDEBUG) 307 endif() 308 else() 309 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 310 list(APPEND LIBCXXABI_COMPILE_FLAGS -DNDEBUG) 311 endif() 312 endif() 313 # Static library 314 if (NOT LIBCXXABI_ENABLE_SHARED) 315 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_LIBCPP_BUILD_STATIC) 316 endif() 317 318 # Threading 319 if (NOT LIBCXXABI_ENABLE_THREADS) 320 if (LIBCXXABI_HAS_PTHREAD_API) 321 message(FATAL_ERROR "LIBCXXABI_HAS_PTHREAD_API can only" 322 " be set to ON when LIBCXXABI_ENABLE_THREADS" 323 " is also set to ON.") 324 endif() 325 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 326 message(FATAL_ERROR "LIBCXXABI_HAS_EXTERNAL_THREAD_API can only" 327 " be set to ON when LIBCXXABI_ENABLE_THREADS" 328 " is also set to ON.") 329 endif() 330 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 331 message(FATAL_ERROR "LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY can only" 332 " be set to ON when LIBCXXABI_ENABLE_THREADS" 333 " is also set to ON.") 334 endif() 335 add_definitions(-D_LIBCXXABI_HAS_NO_THREADS) 336 endif() 337 338 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 339 if (LIBCXXABI_HAS_PTHREAD_API) 340 message(FATAL_ERROR "The options LIBCXXABI_HAS_EXTERNAL_THREAD_API" 341 " and LIBCXXABI_HAS_PTHREAD_API cannot be both" 342 " set to ON at the same time.") 343 endif() 344 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 345 message(FATAL_ERROR "The options LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY" 346 " and LIBCXXABI_HAS_EXTERNAL_THREAD_API cannot be both" 347 " set to ON at the same time.") 348 endif() 349 endif() 350 351 if (LLVM_ENABLE_MODULES) 352 # Ignore that the rest of the modules flags are now unused. 353 add_compile_flags_if_supported(-Wno-unused-command-line-argument) 354 add_compile_flags(-fno-modules) 355 endif() 356 357 set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS OFF) 358 if ((NOT LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS) 359 OR (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXXABI_ENABLE_SHARED) 360 OR MINGW) 361 set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS ON) 362 endif() 363 364 if (LIBCXXABI_HAS_UNDEFINED_SYMBOLS) 365 # Need to allow unresolved symbols if this is to work with shared library builds 366 if (APPLE) 367 list(APPEND LIBCXXABI_LINK_FLAGS "-undefined dynamic_lookup") 368 else() 369 # Relax this restriction from HandleLLVMOptions 370 string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}") 371 endif() 372 endif() 373 374 if (LIBCXXABI_HAS_PTHREAD_API) 375 add_definitions(-D_LIBCPP_HAS_THREAD_API_PTHREAD) 376 endif() 377 378 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API) 379 add_definitions(-D_LIBCPP_HAS_THREAD_API_EXTERNAL) 380 endif() 381 382 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY) 383 add_definitions(-D_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) 384 endif() 385 386 # Prevent libc++abi from having library dependencies on libc++ 387 add_definitions(-D_LIBCPP_DISABLE_EXTERN_TEMPLATE) 388 389 if (MSVC) 390 add_definitions(-D_CRT_SECURE_NO_WARNINGS) 391 endif() 392 393 # Define LIBCXXABI_USE_LLVM_UNWINDER for conditional compilation. 394 if (LIBCXXABI_USE_LLVM_UNWINDER) 395 add_definitions(-DLIBCXXABI_USE_LLVM_UNWINDER) 396 endif() 397 398 if (LIBCXXABI_SILENT_TERMINATE) 399 add_definitions(-DLIBCXXABI_SILENT_TERMINATE) 400 endif() 401 402 if (LIBCXXABI_BAREMETAL) 403 add_definitions(-DLIBCXXABI_BAREMETAL) 404 endif() 405 406 string(REPLACE ";" " " LIBCXXABI_CXX_FLAGS "${LIBCXXABI_CXX_FLAGS}") 407 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FLAGS}") 408 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}") 409 410 #=============================================================================== 411 # Setup Source Code 412 #=============================================================================== 413 414 set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH 415 "Specify path to libunwind includes." FORCE) 416 set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH 417 "Specify path to libunwind source." FORCE) 418 419 include_directories(include) 420 if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM) 421 find_path( 422 LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL 423 libunwind.h 424 PATHS ${LIBCXXABI_LIBUNWIND_INCLUDES} 425 ${LIBCXXABI_LIBUNWIND_PATH}/include 426 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBUNWIND_INCLUDES} 427 ${LLVM_MAIN_SRC_DIR}/projects/libunwind/include 428 ${LLVM_MAIN_SRC_DIR}/runtimes/libunwind/include 429 NO_DEFAULT_PATH 430 NO_CMAKE_FIND_ROOT_PATH 431 ) 432 433 if (LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL-NOTFOUND") 434 set(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL "") 435 endif() 436 437 if (NOT LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "") 438 include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}") 439 endif() 440 endif() 441 442 # Add source code. This also contains all of the logic for deciding linker flags 443 # soname, etc... 444 add_subdirectory(src) 445 446 if (LIBCXXABI_INCLUDE_TESTS) 447 if (LIBCXXABI_STANDALONE_BUILD AND NOT LIBCXXABI_ENABLE_SHARED) 448 # We can't reasonably test the system C++ library with a static 449 # libc++abi. We either need to be able to replace libc++abi at 450 # run time (with a shared libc++abi), or we need to be able to 451 # replace the C++ runtime (with a non- standalone build). 452 message(WARNING "The libc++abi tests aren't valid when libc++abi " 453 "is built standalone (i.e. outside of " 454 "llvm/projects/libcxxabi ) and is built without " 455 "a shared library. Either build a shared " 456 "library, build libc++abi at the same time as " 457 "you build libc++, or do without testing. No " 458 "check target will be available!") 459 else() 460 add_subdirectory(test) 461 add_subdirectory(fuzz) 462 endif() 463 endif() 464
