1#=============================================================================== 2# Setup Project 3#=============================================================================== 4 5cmake_minimum_required(VERSION 2.8.8) 6 7if(POLICY CMP0042) 8 cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default 9endif() 10 11if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) 12 project(libcxxabi) 13 14 # Rely on llvm-config. 15 set(CONFIG_OUTPUT) 16 find_program(LLVM_CONFIG "llvm-config") 17 if(DEFINED LLVM_PATH) 18 set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include") 19 set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree") 20 set(LLVM_MAIN_SRC_DIR ${LLVM_PATH}) 21 set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules") 22 elseif(LLVM_CONFIG) 23 message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}") 24 set(CONFIG_COMMAND ${LLVM_CONFIG} 25 "--includedir" 26 "--prefix" 27 "--src-root") 28 execute_process( 29 COMMAND ${CONFIG_COMMAND} 30 RESULT_VARIABLE HAD_ERROR 31 OUTPUT_VARIABLE CONFIG_OUTPUT 32 ) 33 if(NOT HAD_ERROR) 34 string(REGEX REPLACE 35 "[ \t]*[\r\n]+[ \t]*" ";" 36 CONFIG_OUTPUT ${CONFIG_OUTPUT}) 37 else() 38 string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}") 39 message(STATUS "${CONFIG_COMMAND_STR}") 40 message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}") 41 endif() 42 43 list(GET CONFIG_OUTPUT 0 INCLUDE_DIR) 44 list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT) 45 list(GET CONFIG_OUTPUT 2 MAIN_SRC_DIR) 46 47 set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include") 48 set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree") 49 set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree") 50 set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake") 51 set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py") 52 else() 53 message(FATAL_ERROR "llvm-config not found and LLVM_MAIN_SRC_DIR not defined. " 54 "Reconfigure with -DLLVM_CONFIG=path/to/llvm-config " 55 "or -DLLVM_PATH=path/to/llvm-source-root.") 56 endif() 57 58 if(EXISTS ${LLVM_CMAKE_PATH}) 59 list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}") 60 include("${LLVM_CMAKE_PATH}/AddLLVM.cmake") 61 include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake") 62 else() 63 message(FATAL_ERROR "Not found: ${LLVM_CMAKE_PATH}") 64 endif() 65 66 set(PACKAGE_NAME libcxxabi) 67 set(PACKAGE_VERSION 3.7.0svn) 68 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") 69 set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org") 70 71 if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py) 72 set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py) 73 else() 74 # Seek installed Lit. 75 find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit 76 DOC "Path to lit.py") 77 endif() 78 79 if(LLVM_LIT) 80 # Define the default arguments to use with 'lit', and an option for the user 81 # to override. 82 set(LIT_ARGS_DEFAULT "-sv") 83 if (MSVC OR XCODE) 84 set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar") 85 endif() 86 set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit") 87 88 # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools. 89 if( WIN32 AND NOT CYGWIN ) 90 set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools") 91 endif() 92 else() 93 set(LLVM_INCLUDE_TESTS OFF) 94 endif() 95 96 set(LIBCXXABI_LIBDIR_SUFFIX "" CACHE STRING 97 "Define suffix of library directory name (32/64)") 98 99 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX}) 100 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX}) 101 102 set(LIBCXXABI_BUILT_STANDALONE 1) 103else() 104 set(LLVM_MAIN_SRC_DIR "${CMAKE_SOURCE_DIR}" CACHE PATH "Path to LLVM source tree") 105 set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py") 106 set(LIBCXXABI_LIBDIR_SUFFIX ${LLVM_LIBDIR_SUFFIX}) 107endif() 108 109#=============================================================================== 110# Setup CMake Options 111#=============================================================================== 112 113# Define options. 114option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON) 115option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." ON) 116option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) 117option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF) 118option(LIBCXXABI_ENABLE_THREADS "Build with threads enabled" ON) 119set(LIBCXXABI_GCC_TOOLCHAIN "" CACHE STRING "GCC toolchain for cross compiling.") 120set(LIBCXXABI_SYSROOT "" CACHE STRING "Sysroot for cross compiling.") 121set(LIBCXXABI_LIBCXX_LIBRARY_PATH "" CACHE STRING "The path to libc++ library.") 122 123# Default to building a shared library so that the default options still test 124# the libc++abi that is being built. There are two problems with testing a 125# static libc++abi. In the case of a standalone build, the tests will link the 126# system's libc++, which might not have been built against our libc++abi. In the 127# case of an in tree build, libc++ will prefer a dynamic libc++abi from the 128# system over a static libc++abi from the output directory. 129option(LIBCXXABI_ENABLE_SHARED "Build libc++abi as a shared library." ON) 130option(LIBCXXABI_ENABLE_STATIC "Build libc++abi as a static library." ON) 131 132if (NOT LIBCXXABI_ENABLE_SHARED AND NOT LIBCXXABI_ENABLE_STATIC) 133 message(FATAL_ERROR "libc++abi must be built as either a shared or static library.") 134endif() 135 136find_path( 137 LIBCXXABI_LIBCXX_INCLUDES 138 vector 139 PATHS ${LIBCXXABI_LIBCXX_INCLUDES} 140 ${LIBCXXABI_LIBCXX_PATH}/include 141 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBCXX_INCLUDES} 142 ${LLVM_MAIN_SRC_DIR}/projects/libcxx/include 143 ${LLVM_INCLUDE_DIR}/c++/v1 144 ) 145 146set(LIBCXXABI_LIBCXX_INCLUDES "${LIBCXXABI_LIBCXX_INCLUDES}" CACHE PATH 147 "Specify path to libc++ includes." FORCE) 148 149find_path( 150 LIBCXXABI_LIBCXX_PATH 151 test/libcxx/__init__.py 152 PATHS ${LIBCXXABI_LIBCXX_PATH} 153 ${LIBCXXABI_LIBCXX_INCLUDES}/../ 154 ${LLVM_MAIN_SRC_DIR}/projects/libcxx/ 155 NO_DEFAULT_PATH 156 ) 157 158if (LIBCXXABI_LIBCXX_PATH STREQUAL "LIBCXXABI_LIBCXX_PATH-NOTFOUND") 159 message(WARNING "LIBCXXABI_LIBCXX_PATH was not specified and couldn't be infered.") 160 set(LIBCXXABI_LIBCXX_PATH "") 161endif() 162 163set(LIBCXXABI_LIBCXX_PATH "${LIBCXXABI_LIBCXX_PATH}" CACHE PATH 164 "Specify path to libc++ source." FORCE) 165 166#=============================================================================== 167# Configure System 168#=============================================================================== 169 170# Add path for custom modules 171set(CMAKE_MODULE_PATH 172 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 173 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 174 ${CMAKE_MODULE_PATH} 175 ) 176 177# Configure compiler. 178include(config-ix) 179 180set(LIBCXXABI_COMPILER ${CMAKE_CXX_COMPILER}) 181set(LIBCXXABI_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) 182set(LIBCXXABI_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) 183set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX}) 184 185#=============================================================================== 186# Setup Compiler Flags 187#=============================================================================== 188 189# Get required flags. 190macro(append_if list condition var) 191 if (${condition}) 192 list(APPEND ${list} ${var}) 193 endif() 194endmacro() 195 196set(LIBCXXABI_C_FLAGS "") 197set(LIBCXXABI_CXX_FLAGS "") 198set(LIBCXXABI_COMPILE_FLAGS "") 199set(LIBCXXABI_LINK_FLAGS "") 200 201 202if (LIBCXXABI_HAS_NOSTDINCXX_FLAG) 203 list(APPEND LIBCXXABI_COMPILE_FLAGS -nostdinc++) 204 # Remove -stdlib flags to prevent them from causing an unused flag warning. 205 string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 206 string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") 207endif() 208 209 210append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WERROR_FLAG -Werror=return-type) 211 212# Get warning flags 213append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_W_FLAG -W) 214append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WALL_FLAG -Wall) 215append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WCHAR_SUBSCRIPTS_FLAG -Wchar-subscripts) 216append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WCONVERSION_FLAG -Wconversion) 217append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WMISMATCHED_TAGS_FLAG -Wmismatched-tags) 218append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WMISSING_BRACES_FLAG -Wmissing-braces) 219append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WNEWLINE_EOF_FLAG -Wnewline-eof) 220append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WNO_UNUSED_FUNCTION_FLAG -Wno-unused-function) 221append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WSHADOW_FLAG -Wshadow) 222append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WSHORTEN_64_TO_32_FLAG -Wshorten-64-to-32) 223append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WSIGN_COMPARE_FLAG -Wsign-compare) 224append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WSIGN_CONVERSION_FLAG -Wsign-conversion) 225append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WSTRICT_ALIASING_FLAG -Wstrict-aliasing=2) 226append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WSTRICT_OVERFLOW_FLAG -Wstrict-overflow=4) 227append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WUNUSED_PARAMETER_FLAG -Wunused-parameter) 228append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WUNUSED_VARIABLE_FLAG -Wunused-variable) 229append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings) 230append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WUNDEF_FLAG -Wundef) 231 232if (LIBCXXABI_ENABLE_WERROR) 233 append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WERROR_FLAG -Werror) 234 append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WX_FLAG -WX) 235else() 236 append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_WNO_ERROR_FLAG -Wno-error) 237 append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_NO_WX_FLAG -WX-) 238endif() 239if (LIBCXXABI_ENABLE_PEDANTIC) 240 append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_PEDANTIC_FLAG -pedantic) 241endif() 242 243# Get feature flags. 244# Exceptions 245# Catches C++ exceptions only and tells the compiler to assume that extern C 246# functions never throw a C++ exception. 247append_if(LIBCXXABI_CXX_FLAGS LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG -fstrict-aliasing) 248append_if(LIBCXXABI_CXX_FLAGS LIBCXXABI_HAS_EHSC_FLAG -EHsc) 249 250append_if(LIBCXXABI_C_FLAGS LIBCXXABI_HAS_FUNWIND_TABLES -funwind-tables) 251 252# Assert 253string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) 254if (LIBCXXABI_ENABLE_ASSERTIONS) 255 # MSVC doesn't like _DEBUG on release builds. See PR 4379. 256 if (NOT MSVC) 257 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_DEBUG) 258 endif() 259 # On Release builds cmake automatically defines NDEBUG, so we 260 # explicitly undefine it: 261 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 262 list(APPEND LIBCXXABI_COMPILE_FLAGS -UNDEBUG) 263 endif() 264else() 265 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 266 list(APPEND LIBCXXABI_COMPILE_FLAGS -DNDEBUG) 267 endif() 268endif() 269# Static library 270if (NOT LIBCXXABI_ENABLE_SHARED) 271 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_LIBCPP_BUILD_STATIC) 272endif() 273 274if (NOT LIBCXXABI_ENABLE_THREADS) 275 add_definitions(-DLIBCXXABI_HAS_NO_THREADS=1) 276endif() 277 278# This is the _ONLY_ place where add_definitions is called. 279if (MSVC) 280 add_definitions(-D_CRT_SECURE_NO_WARNINGS) 281endif() 282 283# Define LIBCXXABI_USE_LLVM_UNWINDER for conditional compilation. 284if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM) 285 add_definitions(-DLIBCXXABI_USE_LLVM_UNWINDER=1) 286endif() 287 288append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_TARGET_TRIPLE 289 "-target ${LIBCXXABI_TARGET_TRIPLE}") 290append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_GCC_TOOLCHAIN 291 "-gcc-toolchain ${LIBCXXABI_GCC_TOOLCHAIN}") 292append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_SYSROOT 293 "--sysroot ${LIBCXXABI_SYSROOT}") 294string(REPLACE ";" " " LIBCXXABI_CXX_FLAGS "${LIBCXXABI_CXX_FLAGS}") 295set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FLAGS}") 296set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}") 297 298#=============================================================================== 299# Setup Source Code 300#=============================================================================== 301 302set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH 303 "Specify path to libunwind includes." FORCE) 304set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH 305 "Specify path to libunwind source." FORCE) 306 307include_directories(include) 308if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM) 309 find_path( 310 LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL 311 libunwind.h 312 PATHS ${LIBCXXABI_LIBUNWIND_INCLUDES} 313 ${LIBCXXABI_LIBUNWIND_PATH}/include 314 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBUNWIND_INCLUDES} 315 ${LLVM_MAIN_SRC_DIR}/projects/libunwind/include 316 NO_DEFAULT_PATH 317 ) 318 319 find_path( 320 LIBCXXABI_LIBUNWIND_SOURCES 321 libunwind_ext.h 322 PATHS ${LIBCXXABI_LIBUNWIND_PATH}/src/ 323 ${LIBCXXABI_LIBUNWIND_INCLUDES}/../src/ 324 ${LLVM_MAIN_SRC_DIR}/projects/libunwind/src/ 325 NO_DEFAULT_PATH 326 ) 327 328 if (LIBCXXABI_LIBUNWIND_SOURCES STREQUAL "LIBCXXABI_LIBUNWIND_SOURCES-NOTFOUND") 329 message(WARNING "LIBCXXABI_LIBCXX_PATH was not specified and couldn't be infered.") 330 set(LIBCXXABI_LIBUNWIND_SOURCES "") 331 endif() 332 333 include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}") 334 include_directories("${LIBCXXABI_LIBUNWIND_SOURCES}") 335endif () 336 337# Add source code. This also contains all of the logic for deciding linker flags 338# soname, etc... 339add_subdirectory(src) 340 341if(NOT LIBCXXABI_ENABLE_SHARED) 342 # TODO: Fix the libc++ cmake files so that libc++abi can be statically linked. 343 # As it is now, libc++ will prefer linking against a dynamic libc++abi in the 344 # system library paths over a static libc++abi in the out directory. This 345 # would test the system library rather than the one we just built, which isn't 346 # very helpful. 347 message(WARNING "The libc++abi tests are currently only valid when " 348 "LIBCXXABI_ENABLE_SHARED is on, no check target will be " 349 "available!") 350else() 351 add_subdirectory(test) 352endif() 353