1#=============================================================================== 2# Setup Project 3#=============================================================================== 4 5cmake_minimum_required(VERSION 3.4.3) 6 7if (POLICY CMP0042) 8 cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default 9endif() 10 11# Add path for custom modules 12set(CMAKE_MODULE_PATH 13 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 14 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" 15 ${CMAKE_MODULE_PATH} 16 ) 17 18if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) 19 project(libunwind) 20 21 # Rely on llvm-config. 22 set(CONFIG_OUTPUT) 23 if(NOT LLVM_CONFIG_PATH) 24 find_program(LLVM_CONFIG_PATH "llvm-config") 25 endif() 26 if (DEFINED LLVM_PATH) 27 set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include") 28 set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree") 29 set(LLVM_MAIN_SRC_DIR ${LLVM_PATH}) 30 set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules") 31 elseif(LLVM_CONFIG_PATH) 32 message(STATUS "Found LLVM_CONFIG_PATH as ${LLVM_CONFIG_PATH}") 33 set(CONFIG_COMMAND ${LLVM_CONFIG_PATH} "--includedir" "--prefix" "--src-root") 34 execute_process(COMMAND ${CONFIG_COMMAND} 35 RESULT_VARIABLE HAD_ERROR 36 OUTPUT_VARIABLE CONFIG_OUTPUT) 37 if (NOT HAD_ERROR) 38 string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";" 39 CONFIG_OUTPUT ${CONFIG_OUTPUT}) 40 else() 41 string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}") 42 message(STATUS "${CONFIG_COMMAND_STR}") 43 message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}") 44 endif() 45 46 list(GET CONFIG_OUTPUT 0 INCLUDE_DIR) 47 list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT) 48 list(GET CONFIG_OUTPUT 2 MAIN_SRC_DIR) 49 50 set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include") 51 set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree") 52 set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree") 53 set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py") 54 55 # --cmakedir is supported since llvm r291218 (4.0 release) 56 execute_process( 57 COMMAND ${LLVM_CONFIG_PATH} --cmakedir 58 RESULT_VARIABLE HAD_ERROR 59 OUTPUT_VARIABLE CONFIG_OUTPUT 60 ERROR_QUIET) 61 if(NOT HAD_ERROR) 62 string(STRIP "${CONFIG_OUTPUT}" LLVM_CMAKE_PATH_FROM_LLVM_CONFIG) 63 file(TO_CMAKE_PATH "${LLVM_CMAKE_PATH_FROM_LLVM_CONFIG}" LLVM_CMAKE_PATH) 64 else() 65 file(TO_CMAKE_PATH "${LLVM_BINARY_DIR}" LLVM_BINARY_DIR_CMAKE_STYLE) 66 set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR_CMAKE_STYLE}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm") 67 endif() 68 else() 69 message(WARNING "UNSUPPORTED LIBUNWIND CONFIGURATION DETECTED: " 70 "llvm-config not found and LLVM_MAIN_SRC_DIR not defined. " 71 "Reconfigure with -DLLVM_CONFIG=path/to/llvm-config " 72 "or -DLLVM_PATH=path/to/llvm-source-root.") 73 endif() 74 75 if (EXISTS ${LLVM_CMAKE_PATH}) 76 # Enable warnings, otherwise -w gets added to the cflags by HandleLLVMOptions. 77 set(LLVM_ENABLE_WARNINGS ON) 78 list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}") 79 include("${LLVM_CMAKE_PATH}/AddLLVM.cmake") 80 include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake") 81 else() 82 message(WARNING "Not found: ${LLVM_CMAKE_PATH}") 83 endif() 84 85 set(PACKAGE_NAME libunwind) 86 set(PACKAGE_VERSION 9.0.0svn) 87 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") 88 set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org") 89 90 if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py) 91 set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py) 92 else() 93 # Seek installed Lit. 94 find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit 95 DOC "Path to lit.py") 96 endif() 97 98 if (LLVM_LIT) 99 # Define the default arguments to use with 'lit', and an option for the user 100 # to override. 101 set(LIT_ARGS_DEFAULT "-sv") 102 if (MSVC OR XCODE) 103 set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar") 104 endif() 105 set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit") 106 107 # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools. 108 if (WIN32 AND NOT CYGWIN) 109 set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools") 110 endif() 111 else() 112 set(LLVM_INCLUDE_TESTS OFF) 113 endif() 114 115 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}) 116 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}) 117else() 118 set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py") 119endif() 120 121#=============================================================================== 122# Setup CMake Options 123#=============================================================================== 124include(CMakeDependentOption) 125include(HandleCompilerRT) 126 127# Define options. 128option(LIBUNWIND_BUILD_32_BITS "Build 32 bit libunwind" ${LLVM_BUILD_32_BITS}) 129option(LIBUNWIND_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON) 130option(LIBUNWIND_ENABLE_PEDANTIC "Compile with pedantic enabled." ON) 131option(LIBUNWIND_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) 132option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON) 133option(LIBUNWIND_ENABLE_STATIC "Build libunwind as a static library." ON) 134option(LIBUNWIND_ENABLE_CROSS_UNWINDING "Enable cross-platform unwinding support." OFF) 135option(LIBUNWIND_ENABLE_ARM_WMMX "Enable unwinding support for ARM WMMX registers." OFF) 136option(LIBUNWIND_ENABLE_THREADS "Build libunwind with threading support." ON) 137option(LIBUNWIND_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF) 138option(LIBUNWIND_INCLUDE_DOCS "Build the libunwind documentation." ${LLVM_INCLUDE_DOCS}) 139 140set(LIBUNWIND_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING 141 "Define suffix of library directory name (32/64)") 142option(LIBUNWIND_INSTALL_LIBRARY "Install the libunwind library." ON) 143cmake_dependent_option(LIBUNWIND_INSTALL_STATIC_LIBRARY 144 "Install the static libunwind library." ON 145 "LIBUNWIND_ENABLE_STATIC;LIBUNWIND_INSTALL_LIBRARY" OFF) 146cmake_dependent_option(LIBUNWIND_INSTALL_SHARED_LIBRARY 147 "Install the shared libunwind library." ON 148 "LIBUNWIND_ENABLE_SHARED;LIBUNWIND_INSTALL_LIBRARY" OFF) 149set(LIBUNWIND_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.") 150set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.") 151set(LIBUNWIND_SYSROOT "" CACHE PATH "Sysroot for cross compiling.") 152set(LIBUNWIND_TEST_LINKER_FLAGS "" CACHE STRING 153 "Additional linker flags for test programs.") 154set(LIBUNWIND_TEST_COMPILER_FLAGS "" CACHE STRING 155 "Additional compiler flags for test programs.") 156 157if (NOT LIBUNWIND_ENABLE_SHARED AND NOT LIBUNWIND_ENABLE_STATIC) 158 message(FATAL_ERROR "libunwind must be built as either a shared or static library.") 159endif() 160 161# Check that we can build with 32 bits if requested. 162if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32) 163 if (LIBUNWIND_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM 164 message(STATUS "Building 32 bits executables and libraries.") 165 endif() 166elseif(LIBUNWIND_BUILD_32_BITS) 167 message(FATAL_ERROR "LIBUNWIND_BUILD_32_BITS=ON is not supported on this platform.") 168endif() 169 170option(LIBUNWIND_HERMETIC_STATIC_LIBRARY 171 "Do not export any symbols from the static library." OFF) 172 173#=============================================================================== 174# Configure System 175#=============================================================================== 176 177# Add path for custom modules 178set(CMAKE_MODULE_PATH 179 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" 180 ${CMAKE_MODULE_PATH}) 181 182set(LIBUNWIND_COMPILER ${CMAKE_CXX_COMPILER}) 183set(LIBUNWIND_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) 184set(LIBUNWIND_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) 185 186string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION 187 ${PACKAGE_VERSION}) 188 189if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE) 190 set(DEFAULT_INSTALL_PREFIX lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/${LLVM_DEFAULT_TARGET_TRIPLE}/) 191 set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION}/${LLVM_DEFAULT_TARGET_TRIPLE}/lib${LIBUNWIND_LIBDIR_SUFFIX}) 192elseif(LLVM_LIBRARY_OUTPUT_INTDIR) 193 set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}) 194else() 195 set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX}) 196endif() 197 198set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR}) 199set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR}) 200set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR}) 201 202set(LIBUNWIND_INSTALL_PREFIX ${DEFAULT_INSTALL_PREFIX} CACHE STRING 203 "Define libunwind destination prefix.") 204 205set(LIBUNWIND_C_FLAGS "") 206set(LIBUNWIND_CXX_FLAGS "") 207set(LIBUNWIND_COMPILE_FLAGS "") 208set(LIBUNWIND_LINK_FLAGS "") 209 210# Get required flags. 211macro(unwind_append_if list condition var) 212 if (${condition}) 213 list(APPEND ${list} ${var}) 214 endif() 215endmacro() 216 217macro(add_target_flags) 218 foreach(value ${ARGN}) 219 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${value}") 220 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${value}") 221 list(APPEND LIBUNWIND_COMPILE_FLAGS ${value}) 222 list(APPEND LIBUNWIND_LINK_FLAGS ${value}) 223 endforeach() 224endmacro() 225 226macro(add_target_flags_if condition) 227 if (${condition}) 228 add_target_flags(${ARGN}) 229 endif() 230endmacro() 231 232add_target_flags_if(LIBUNWIND_BUILD_32_BITS "-m32") 233 234if(LIBUNWIND_TARGET_TRIPLE) 235 add_target_flags("--target=${LIBUNWIND_TARGET_TRIPLE}") 236elseif(CMAKE_CXX_COMPILER_TARGET) 237 set(LIBUNWIND_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}") 238endif() 239if(LIBUNWIND_GCC_TOOLCHAIN) 240 add_target_flags("--gcc-toolchain=${LIBUNWIND_GCC_TOOLCHAIN}") 241elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN) 242 set(LIBUNWIND_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}") 243endif() 244if(LIBUNWIND_SYSROOT) 245 add_target_flags("--sysroot=${LIBUNWIND_SYSROOT}") 246elseif(CMAKE_SYSROOT) 247 set(LIBUNWIND_SYSROOT "${CMAKE_SYSROOT}") 248endif() 249 250if (LIBUNWIND_TARGET_TRIPLE) 251 set(TARGET_TRIPLE "${LIBUNWIND_TARGET_TRIPLE}") 252endif() 253 254# Configure compiler. 255include(config-ix) 256 257if (LIBUNWIND_USE_COMPILER_RT AND NOT LIBUNWIND_HAS_NODEFAULTLIBS_FLAG) 258 list(APPEND LIBUNWIND_LINK_FLAGS "-rtlib=compiler-rt") 259endif() 260 261#=============================================================================== 262# Setup Compiler Flags 263#=============================================================================== 264 265unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WERROR_FLAG -Werror=return-type) 266 267# Get warning flags 268unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_W_FLAG -W) 269unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WALL_FLAG -Wall) 270unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WCHAR_SUBSCRIPTS_FLAG -Wchar-subscripts) 271unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WCONVERSION_FLAG -Wconversion) 272unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WMISMATCHED_TAGS_FLAG -Wmismatched-tags) 273unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WMISSING_BRACES_FLAG -Wmissing-braces) 274unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNEWLINE_EOF_FLAG -Wnewline-eof) 275unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNO_UNUSED_FUNCTION_FLAG -Wno-unused-function) 276unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSHADOW_FLAG -Wshadow) 277unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSHORTEN_64_TO_32_FLAG -Wshorten-64-to-32) 278unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSIGN_COMPARE_FLAG -Wsign-compare) 279unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSIGN_CONVERSION_FLAG -Wsign-conversion) 280unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSTRICT_ALIASING_FLAG -Wstrict-aliasing=2) 281unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSTRICT_OVERFLOW_FLAG -Wstrict-overflow=4) 282unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNUSED_PARAMETER_FLAG -Wunused-parameter) 283unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNUSED_VARIABLE_FLAG -Wunused-variable) 284unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings) 285unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNDEF_FLAG -Wundef) 286 287if (LIBUNWIND_ENABLE_WERROR) 288 unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WERROR_FLAG -Werror) 289 unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WX_FLAG -WX) 290else() 291 unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNO_ERROR_FLAG -Wno-error) 292 unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_NO_WX_FLAG -WX-) 293endif() 294 295if (LIBUNWIND_ENABLE_PEDANTIC) 296 unwind_append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_PEDANTIC_FLAG -pedantic) 297endif() 298 299# Get feature flags. 300# Exceptions 301# Catches C++ exceptions only and tells the compiler to assume that extern C 302# functions never throw a C++ exception. 303unwind_append_if(LIBUNWIND_CXX_FLAGS LIBUNWIND_HAS_FSTRICT_ALIASING_FLAG -fstrict-aliasing) 304unwind_append_if(LIBUNWIND_CXX_FLAGS LIBUNWIND_HAS_EHSC_FLAG -EHsc) 305 306unwind_append_if(LIBUNWIND_C_FLAGS LIBUNWIND_HAS_FUNWIND_TABLES -funwind-tables) 307 308# Ensure that we don't depend on C++ standard library. 309unwind_append_if(LIBUNWIND_CXX_FLAGS LIBUNWIND_HAS_NOSTDINCXX_FLAG -nostdinc++) 310 311# Assert 312string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) 313if (LIBUNWIND_ENABLE_ASSERTIONS) 314 # MSVC doesn't like _DEBUG on release builds. See PR 4379. 315 if (NOT MSVC) 316 list(APPEND LIBUNWIND_COMPILE_FLAGS -D_DEBUG) 317 endif() 318 319 # On Release builds cmake automatically defines NDEBUG, so we 320 # explicitly undefine it: 321 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 322 list(APPEND LIBUNWIND_COMPILE_FLAGS -UNDEBUG) 323 endif() 324else() 325 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") 326 list(APPEND LIBUNWIND_COMPILE_FLAGS -DNDEBUG) 327 endif() 328endif() 329 330# Cross-unwinding 331if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING) 332 list(APPEND LIBUNWIND_COMPILE_FLAGS -D_LIBUNWIND_IS_NATIVE_ONLY) 333endif() 334 335# Threading-support 336if (NOT LIBUNWIND_ENABLE_THREADS) 337 list(APPEND LIBUNWIND_COMPILE_FLAGS -D_LIBUNWIND_HAS_NO_THREADS) 338endif() 339 340# ARM WMMX register support 341if (LIBUNWIND_ENABLE_ARM_WMMX) 342 # __ARM_WMMX is a compiler pre-define (as per the ACLE 2.0). Clang does not 343 # define this macro for any supported target at present. Therefore, here we 344 # provide the option to explicitly enable support for WMMX registers in the 345 # unwinder. 346 list(APPEND LIBUNWIND_COMPILE_FLAGS -D__ARM_WMMX) 347endif() 348 349# This is the _ONLY_ place where add_definitions is called. 350if (MSVC) 351 add_definitions(-D_CRT_SECURE_NO_WARNINGS) 352endif() 353 354# Disable DLL annotations on Windows for static builds. 355if (WIN32 AND LIBUNWIND_ENABLE_STATIC AND NOT LIBUNWIND_ENABLE_SHARED) 356 add_definitions(-D_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS) 357endif() 358 359#=============================================================================== 360# Setup Source Code 361#=============================================================================== 362 363include_directories(include) 364 365add_subdirectory(src) 366 367if (LIBUNWIND_INCLUDE_DOCS) 368 add_subdirectory(docs) 369endif() 370 371if (EXISTS ${LLVM_CMAKE_PATH}) 372 add_subdirectory(test) 373endif() 374