mirror of
https://github.com/darlinghq/darling-libunwind.git
synced 2024-11-26 22:10:25 +00:00
410 lines
16 KiB
Plaintext
410 lines
16 KiB
Plaintext
#===============================================================================
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# Setup Project
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#===============================================================================
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cmake_minimum_required(VERSION 3.13.4)
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if (POLICY CMP0042)
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cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
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endif()
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# Add path for custom modules
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set(CMAKE_MODULE_PATH
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
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${CMAKE_MODULE_PATH}
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)
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if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBUNWIND_STANDALONE_BUILD)
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project(libunwind LANGUAGES C CXX ASM)
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# Rely on llvm-config.
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set(CONFIG_OUTPUT)
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if(NOT LLVM_CONFIG_PATH)
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find_program(LLVM_CONFIG_PATH "llvm-config")
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endif()
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if (DEFINED LLVM_PATH)
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set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include")
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set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree")
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set(LLVM_MAIN_SRC_DIR ${LLVM_PATH})
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set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules")
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elseif(LLVM_CONFIG_PATH)
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message(STATUS "Found LLVM_CONFIG_PATH as ${LLVM_CONFIG_PATH}")
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set(CONFIG_COMMAND ${LLVM_CONFIG_PATH} "--includedir" "--prefix" "--src-root")
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execute_process(COMMAND ${CONFIG_COMMAND}
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RESULT_VARIABLE HAD_ERROR
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OUTPUT_VARIABLE CONFIG_OUTPUT)
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if (NOT HAD_ERROR)
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string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";"
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CONFIG_OUTPUT ${CONFIG_OUTPUT})
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else()
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string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
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message(STATUS "${CONFIG_COMMAND_STR}")
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message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
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endif()
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list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
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list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
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list(GET CONFIG_OUTPUT 2 MAIN_SRC_DIR)
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set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
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set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
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set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
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set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
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# --cmakedir is supported since llvm r291218 (4.0 release)
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execute_process(
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COMMAND ${LLVM_CONFIG_PATH} --cmakedir
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RESULT_VARIABLE HAD_ERROR
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OUTPUT_VARIABLE CONFIG_OUTPUT
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ERROR_QUIET)
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if(NOT HAD_ERROR)
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string(STRIP "${CONFIG_OUTPUT}" LLVM_CMAKE_PATH_FROM_LLVM_CONFIG)
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file(TO_CMAKE_PATH "${LLVM_CMAKE_PATH_FROM_LLVM_CONFIG}" LLVM_CMAKE_PATH)
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else()
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file(TO_CMAKE_PATH "${LLVM_BINARY_DIR}" LLVM_BINARY_DIR_CMAKE_STYLE)
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set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR_CMAKE_STYLE}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
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endif()
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else()
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message(WARNING "UNSUPPORTED LIBUNWIND CONFIGURATION DETECTED: "
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"llvm-config not found and LLVM_MAIN_SRC_DIR not defined. "
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"Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
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"or -DLLVM_PATH=path/to/llvm-source-root.")
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endif()
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if (EXISTS ${LLVM_CMAKE_PATH})
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# Enable warnings, otherwise -w gets added to the cflags by HandleLLVMOptions.
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set(LLVM_ENABLE_WARNINGS ON)
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list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
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include("${LLVM_CMAKE_PATH}/AddLLVM.cmake")
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include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake")
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else()
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message(WARNING "Not found: ${LLVM_CMAKE_PATH}")
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endif()
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set(PACKAGE_NAME libunwind)
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set(PACKAGE_VERSION 12.0.0git)
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set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
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if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
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set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
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else()
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# Seek installed Lit.
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find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
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DOC "Path to lit.py")
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endif()
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if (LLVM_LIT)
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# Define the default arguments to use with 'lit', and an option for the user
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# to override.
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set(LIT_ARGS_DEFAULT "-sv")
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if (MSVC OR XCODE)
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set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
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endif()
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set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
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# On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
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if (WIN32 AND NOT CYGWIN)
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set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
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endif()
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else()
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set(LLVM_INCLUDE_TESTS OFF)
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endif()
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set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
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else()
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set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py")
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endif()
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#===============================================================================
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# Setup CMake Options
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#===============================================================================
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include(CMakeDependentOption)
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include(HandleCompilerRT)
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# Define options.
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option(LIBUNWIND_BUILD_32_BITS "Build 32 bit libunwind" ${LLVM_BUILD_32_BITS})
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option(LIBUNWIND_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
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option(LIBUNWIND_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
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option(LIBUNWIND_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
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option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON)
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option(LIBUNWIND_ENABLE_STATIC "Build libunwind as a static library." ON)
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option(LIBUNWIND_ENABLE_CROSS_UNWINDING "Enable cross-platform unwinding support." OFF)
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option(LIBUNWIND_ENABLE_ARM_WMMX "Enable unwinding support for ARM WMMX registers." OFF)
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option(LIBUNWIND_ENABLE_THREADS "Build libunwind with threading support." ON)
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option(LIBUNWIND_WEAK_PTHREAD_LIB "Use weak references to refer to pthread functions." OFF)
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option(LIBUNWIND_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
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option(LIBUNWIND_INCLUDE_DOCS "Build the libunwind documentation." ${LLVM_INCLUDE_DOCS})
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option(LIBUNWIND_IS_BAREMETAL "Build libunwind for baremetal targets." OFF)
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option(LIBUNWIND_USE_FRAME_HEADER_CACHE "Cache frame headers for unwinding. Requires locking dl_iterate_phdr." OFF)
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set(LIBUNWIND_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
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"Define suffix of library directory name (32/64)")
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option(LIBUNWIND_INSTALL_LIBRARY "Install the libunwind library." ON)
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cmake_dependent_option(LIBUNWIND_INSTALL_STATIC_LIBRARY
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"Install the static libunwind library." ON
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"LIBUNWIND_ENABLE_STATIC;LIBUNWIND_INSTALL_LIBRARY" OFF)
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cmake_dependent_option(LIBUNWIND_INSTALL_SHARED_LIBRARY
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"Install the shared libunwind library." ON
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"LIBUNWIND_ENABLE_SHARED;LIBUNWIND_INSTALL_LIBRARY" OFF)
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set(LIBUNWIND_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.")
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set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
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set(LIBUNWIND_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
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set(LIBUNWIND_TEST_LINKER_FLAGS "" CACHE STRING
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"Additional linker flags for test programs.")
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set(LIBUNWIND_TEST_COMPILER_FLAGS "" CACHE STRING
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"Additional compiler flags for test programs.")
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set(LIBUNWIND_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/lit.site.cfg.in" CACHE STRING
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"The Lit testing configuration to use when running the tests.")
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if (NOT LIBUNWIND_ENABLE_SHARED AND NOT LIBUNWIND_ENABLE_STATIC)
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message(FATAL_ERROR "libunwind must be built as either a shared or static library.")
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endif()
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# Check that we can build with 32 bits if requested.
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if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
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if (LIBUNWIND_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
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message(STATUS "Building 32 bits executables and libraries.")
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endif()
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elseif(LIBUNWIND_BUILD_32_BITS)
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message(FATAL_ERROR "LIBUNWIND_BUILD_32_BITS=ON is not supported on this platform.")
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endif()
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option(LIBUNWIND_HERMETIC_STATIC_LIBRARY
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"Do not export any symbols from the static library." OFF)
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#===============================================================================
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# Configure System
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#===============================================================================
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# Add path for custom modules
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set(CMAKE_MODULE_PATH
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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${CMAKE_MODULE_PATH})
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set(LIBUNWIND_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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set(LIBUNWIND_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
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if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
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set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
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set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
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if(LIBCXX_LIBDIR_SUBDIR)
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string(APPEND LIBUNWIND_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
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string(APPEND LIBUNWIND_INSTALL_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
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endif()
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elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
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set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
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set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
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else()
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set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX})
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set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
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endif()
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set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
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set(LIBUNWIND_INSTALL_PREFIX "" CACHE STRING "Define libunwind destination prefix.")
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set(LIBUNWIND_C_FLAGS "")
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set(LIBUNWIND_CXX_FLAGS "")
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set(LIBUNWIND_COMPILE_FLAGS CACHE STRING "")
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set(LIBUNWIND_LINK_FLAGS "")
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# Include macros for adding and removing libunwind flags.
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include(HandleLibunwindFlags)
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#===============================================================================
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# Setup Compiler Flags
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#===============================================================================
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# Get required flags.
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add_target_flags_if(LIBUNWIND_BUILD_32_BITS "-m32")
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if(LIBUNWIND_TARGET_TRIPLE)
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add_target_flags("--target=${LIBUNWIND_TARGET_TRIPLE}")
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elseif(CMAKE_CXX_COMPILER_TARGET)
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set(LIBUNWIND_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}")
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endif()
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if(LIBUNWIND_GCC_TOOLCHAIN)
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add_target_flags("--gcc-toolchain=${LIBUNWIND_GCC_TOOLCHAIN}")
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elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN)
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set(LIBUNWIND_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}")
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endif()
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if(LIBUNWIND_SYSROOT)
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add_target_flags("--sysroot=${LIBUNWIND_SYSROOT}")
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elseif(CMAKE_SYSROOT)
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set(LIBUNWIND_SYSROOT "${CMAKE_SYSROOT}")
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endif()
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if (LIBUNWIND_TARGET_TRIPLE)
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set(TARGET_TRIPLE "${LIBUNWIND_TARGET_TRIPLE}")
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endif()
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# Configure compiler.
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include(config-ix)
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if (LIBUNWIND_USE_COMPILER_RT AND NOT LIBUNWIND_HAS_NODEFAULTLIBS_FLAG)
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list(APPEND LIBUNWIND_LINK_FLAGS "-rtlib=compiler-rt")
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endif()
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add_compile_flags_if_supported(-Werror=return-type)
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# Get warning flags
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add_compile_flags_if_supported(-W)
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add_compile_flags_if_supported(-Wall)
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add_compile_flags_if_supported(-Wchar-subscripts)
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add_compile_flags_if_supported(-Wconversion)
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add_compile_flags_if_supported(-Wmismatched-tags)
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add_compile_flags_if_supported(-Wmissing-braces)
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add_compile_flags_if_supported(-Wnewline-eof)
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add_compile_flags_if_supported(-Wno-unused-function)
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add_compile_flags_if_supported(-Wshadow)
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add_compile_flags_if_supported(-Wshorten-64-to-32)
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add_compile_flags_if_supported(-Wsign-compare)
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add_compile_flags_if_supported(-Wsign-conversion)
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add_compile_flags_if_supported(-Wstrict-aliasing=2)
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add_compile_flags_if_supported(-Wstrict-overflow=4)
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add_compile_flags_if_supported(-Wunused-parameter)
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add_compile_flags_if_supported(-Wunused-variable)
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add_compile_flags_if_supported(-Wwrite-strings)
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add_compile_flags_if_supported(-Wundef)
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add_compile_flags_if_supported(-Wno-suggest-override)
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if (LIBUNWIND_ENABLE_WERROR)
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add_compile_flags_if_supported(-Werror)
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add_compile_flags_if_supported(-WX)
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else()
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add_compile_flags_if_supported(-Wno-error)
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add_compile_flags_if_supported(-WX-)
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endif()
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if (LIBUNWIND_ENABLE_PEDANTIC)
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add_compile_flags_if_supported(-pedantic)
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endif()
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# Get feature flags.
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# Exceptions
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# Catches C++ exceptions only and tells the compiler to assume that extern C
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# functions never throw a C++ exception.
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add_cxx_compile_flags_if_supported(-fstrict-aliasing)
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add_cxx_compile_flags_if_supported(-EHsc)
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# Don't run the linker in this CMake check.
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#
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# The reason why this was added is that when building libunwind for
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# ARM Linux, we need to pass the -funwind-tables flag in order for it to
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# work properly with ARM EHABI.
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#
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# However, when performing CMake checks, adding this flag causes the check
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# to produce a false negative, because the compiler generates calls
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# to __aeabi_unwind_cpp_pr0, which is defined in libunwind itself,
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# which isn't built yet, so the linker complains about undefined symbols.
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#
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# This leads to libunwind not being built with this flag, which makes
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# libunwind quite useless in this setup.
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set(_previous_CMAKE_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
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set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
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add_compile_flags_if_supported(-funwind-tables)
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set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_previous_CMAKE_TRY_COMPILE_TARGET_TYPE})
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if (LIBUNWIND_USES_ARM_EHABI AND NOT LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG)
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message(SEND_ERROR "The -funwind-tables flag must be supported "
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"because this target uses ARM Exception Handling ABI")
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endif()
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add_cxx_compile_flags_if_supported(-fno-exceptions)
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add_cxx_compile_flags_if_supported(-fno-rtti)
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# Ensure that we don't depend on C++ standard library.
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if (LIBUNWIND_HAS_NOSTDINCXX_FLAG)
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list(APPEND LIBUNWIND_COMPILE_FLAGS -nostdinc++)
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# Remove -stdlib flags to prevent them from causing an unused flag warning.
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string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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endif()
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# Assert
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string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
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if (LIBUNWIND_ENABLE_ASSERTIONS)
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# MSVC doesn't like _DEBUG on release builds. See PR 4379.
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if (NOT MSVC)
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add_compile_flags(-D_DEBUG)
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endif()
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# On Release builds cmake automatically defines NDEBUG, so we
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# explicitly undefine it:
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if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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add_compile_flags(-UNDEBUG)
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endif()
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else()
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if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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add_compile_flags(-DNDEBUG)
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endif()
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endif()
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# Cross-unwinding
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if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING)
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add_compile_flags(-D_LIBUNWIND_IS_NATIVE_ONLY)
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endif()
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# Threading-support
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if (NOT LIBUNWIND_ENABLE_THREADS)
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add_compile_flags(-D_LIBUNWIND_HAS_NO_THREADS)
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endif()
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# ARM WMMX register support
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if (LIBUNWIND_ENABLE_ARM_WMMX)
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# __ARM_WMMX is a compiler pre-define (as per the ACLE 2.0). Clang does not
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# define this macro for any supported target at present. Therefore, here we
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# provide the option to explicitly enable support for WMMX registers in the
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# unwinder.
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add_compile_flags(-D__ARM_WMMX)
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endif()
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if(LIBUNWIND_IS_BAREMETAL)
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add_compile_definitions(_LIBUNWIND_IS_BAREMETAL)
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endif()
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if(LIBUNWIND_USE_FRAME_HEADER_CACHE)
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add_compile_definitions(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
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endif()
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# This is the _ONLY_ place where add_definitions is called.
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if (MSVC)
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add_definitions(-D_CRT_SECURE_NO_WARNINGS)
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endif()
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# Disable DLL annotations on Windows for static builds.
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if (WIN32 AND LIBUNWIND_ENABLE_STATIC AND NOT LIBUNWIND_ENABLE_SHARED)
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add_definitions(-D_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
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endif()
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if (LIBUNWIND_HAS_COMMENT_LIB_PRAGMA)
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if (LIBUNWIND_HAS_DL_LIB)
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add_definitions(-D_LIBUNWIND_LINK_DL_LIB)
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endif()
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if (LIBUNWIND_HAS_PTHREAD_LIB)
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add_definitions(-D_LIBUNWIND_LINK_PTHREAD_LIB)
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endif()
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endif()
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#===============================================================================
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# Setup Source Code
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#===============================================================================
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include_directories(include)
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add_subdirectory(src)
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if (LIBUNWIND_INCLUDE_DOCS)
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add_subdirectory(docs)
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endif()
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if (EXISTS ${LLVM_CMAKE_PATH})
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add_subdirectory(test)
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endif()
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