blob: 6dd0a15405b5b8770dad42670033ca533c2105d0 [file] [log] [blame]
#===============================================================================
# Setup Project
#===============================================================================
cmake_minimum_required(VERSION 3.4.3)
if (POLICY CMP0042)
cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
endif()
# Add path for custom modules
set(CMAKE_MODULE_PATH
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
${CMAKE_MODULE_PATH}
)
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBUNWIND_STANDALONE_BUILD)
project(libunwind)
# Rely on llvm-config.
set(CONFIG_OUTPUT)
if(NOT LLVM_CONFIG_PATH)
find_program(LLVM_CONFIG_PATH "llvm-config")
endif()
if (DEFINED LLVM_PATH)
set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include")
set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree")
set(LLVM_MAIN_SRC_DIR ${LLVM_PATH})
set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules")
elseif(LLVM_CONFIG_PATH)
message(STATUS "Found LLVM_CONFIG_PATH as ${LLVM_CONFIG_PATH}")
set(CONFIG_COMMAND ${LLVM_CONFIG_PATH} "--includedir" "--prefix" "--src-root")
execute_process(COMMAND ${CONFIG_COMMAND}
RESULT_VARIABLE HAD_ERROR
OUTPUT_VARIABLE CONFIG_OUTPUT)
if (NOT HAD_ERROR)
string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";"
CONFIG_OUTPUT ${CONFIG_OUTPUT})
else()
string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
message(STATUS "${CONFIG_COMMAND_STR}")
message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
endif()
list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
list(GET CONFIG_OUTPUT 2 MAIN_SRC_DIR)
set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
# --cmakedir is supported since llvm r291218 (4.0 release)
execute_process(
COMMAND ${LLVM_CONFIG_PATH} --cmakedir
RESULT_VARIABLE HAD_ERROR
OUTPUT_VARIABLE CONFIG_OUTPUT
ERROR_QUIET)
if(NOT HAD_ERROR)
string(STRIP "${CONFIG_OUTPUT}" LLVM_CMAKE_PATH_FROM_LLVM_CONFIG)
file(TO_CMAKE_PATH "${LLVM_CMAKE_PATH_FROM_LLVM_CONFIG}" LLVM_CMAKE_PATH)
else()
file(TO_CMAKE_PATH "${LLVM_BINARY_DIR}" LLVM_BINARY_DIR_CMAKE_STYLE)
set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR_CMAKE_STYLE}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
endif()
else()
message(WARNING "UNSUPPORTED LIBUNWIND CONFIGURATION DETECTED: "
"llvm-config not found and LLVM_MAIN_SRC_DIR not defined. "
"Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
"or -DLLVM_PATH=path/to/llvm-source-root.")
endif()
if (EXISTS ${LLVM_CMAKE_PATH})
# Enable warnings, otherwise -w gets added to the cflags by HandleLLVMOptions.
set(LLVM_ENABLE_WARNINGS ON)
list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
include("${LLVM_CMAKE_PATH}/AddLLVM.cmake")
include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake")
else()
message(WARNING "Not found: ${LLVM_CMAKE_PATH}")
endif()
set(PACKAGE_NAME libunwind)
set(PACKAGE_VERSION 10.0.0git)
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
else()
# Seek installed Lit.
find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
DOC "Path to lit.py")
endif()
if (LLVM_LIT)
# Define the default arguments to use with 'lit', and an option for the user
# to override.
set(LIT_ARGS_DEFAULT "-sv")
if (MSVC OR XCODE)
set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
endif()
set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
# On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
if (WIN32 AND NOT CYGWIN)
set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
endif()
else()
set(LLVM_INCLUDE_TESTS OFF)
endif()
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
else()
set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py")
endif()
#===============================================================================
# Setup CMake Options
#===============================================================================
include(CMakeDependentOption)
include(HandleCompilerRT)
# Define options.
option(LIBUNWIND_BUILD_32_BITS "Build 32 bit libunwind" ${LLVM_BUILD_32_BITS})
option(LIBUNWIND_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
option(LIBUNWIND_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
option(LIBUNWIND_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON)
option(LIBUNWIND_ENABLE_STATIC "Build libunwind as a static library." ON)
option(LIBUNWIND_ENABLE_CROSS_UNWINDING "Enable cross-platform unwinding support." OFF)
option(LIBUNWIND_ENABLE_ARM_WMMX "Enable unwinding support for ARM WMMX registers." OFF)
option(LIBUNWIND_ENABLE_THREADS "Build libunwind with threading support." ON)
option(LIBUNWIND_WEAK_PTHREAD_LIB "Use weak references to refer to pthread functions." OFF)
option(LIBUNWIND_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
option(LIBUNWIND_INCLUDE_DOCS "Build the libunwind documentation." ${LLVM_INCLUDE_DOCS})
set(LIBUNWIND_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
"Define suffix of library directory name (32/64)")
option(LIBUNWIND_INSTALL_LIBRARY "Install the libunwind library." ON)
cmake_dependent_option(LIBUNWIND_INSTALL_STATIC_LIBRARY
"Install the static libunwind library." ON
"LIBUNWIND_ENABLE_STATIC;LIBUNWIND_INSTALL_LIBRARY" OFF)
cmake_dependent_option(LIBUNWIND_INSTALL_SHARED_LIBRARY
"Install the shared libunwind library." ON
"LIBUNWIND_ENABLE_SHARED;LIBUNWIND_INSTALL_LIBRARY" OFF)
set(LIBUNWIND_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.")
set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
set(LIBUNWIND_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
set(LIBUNWIND_TEST_LINKER_FLAGS "" CACHE STRING
"Additional linker flags for test programs.")
set(LIBUNWIND_TEST_COMPILER_FLAGS "" CACHE STRING
"Additional compiler flags for test programs.")
if (NOT LIBUNWIND_ENABLE_SHARED AND NOT LIBUNWIND_ENABLE_STATIC)
message(FATAL_ERROR "libunwind must be built as either a shared or static library.")
endif()
# Check that we can build with 32 bits if requested.
if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
if (LIBUNWIND_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
message(STATUS "Building 32 bits executables and libraries.")
endif()
elseif(LIBUNWIND_BUILD_32_BITS)
message(FATAL_ERROR "LIBUNWIND_BUILD_32_BITS=ON is not supported on this platform.")
endif()
option(LIBUNWIND_HERMETIC_STATIC_LIBRARY
"Do not export any symbols from the static library." OFF)
#===============================================================================
# Configure System
#===============================================================================
# Add path for custom modules
set(CMAKE_MODULE_PATH
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
${CMAKE_MODULE_PATH})
set(LIBUNWIND_COMPILER ${CMAKE_CXX_COMPILER})
set(LIBUNWIND_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(LIBUNWIND_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
${PACKAGE_VERSION})
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
if(LIBCXX_LIBDIR_SUBDIR)
string(APPEND LIBUNWIND_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
string(APPEND LIBUNWIND_INSTALL_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
endif()
elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
else()
set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX})
set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
endif()
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
set(LIBUNWIND_INSTALL_PREFIX "" CACHE STRING "Define libunwind destination prefix.")
set(LIBUNWIND_C_FLAGS "")
set(LIBUNWIND_CXX_FLAGS "")
set(LIBUNWIND_COMPILE_FLAGS "")
set(LIBUNWIND_LINK_FLAGS "")
# Include macros for adding and removing libunwind flags.
include(HandleLibunwindFlags)
#===============================================================================
# Setup Compiler Flags
#===============================================================================
# Get required flags.
add_target_flags_if(LIBUNWIND_BUILD_32_BITS "-m32")
if(LIBUNWIND_TARGET_TRIPLE)
add_target_flags("--target=${LIBUNWIND_TARGET_TRIPLE}")
elseif(CMAKE_CXX_COMPILER_TARGET)
set(LIBUNWIND_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}")
endif()
if(LIBUNWIND_GCC_TOOLCHAIN)
add_target_flags("--gcc-toolchain=${LIBUNWIND_GCC_TOOLCHAIN}")
elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN)
set(LIBUNWIND_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}")
endif()
if(LIBUNWIND_SYSROOT)
add_target_flags("--sysroot=${LIBUNWIND_SYSROOT}")
elseif(CMAKE_SYSROOT)
set(LIBUNWIND_SYSROOT "${CMAKE_SYSROOT}")
endif()
if (LIBUNWIND_TARGET_TRIPLE)
set(TARGET_TRIPLE "${LIBUNWIND_TARGET_TRIPLE}")
endif()
# Configure compiler.
include(config-ix)
if (LIBUNWIND_USE_COMPILER_RT AND NOT LIBUNWIND_HAS_NODEFAULTLIBS_FLAG)
list(APPEND LIBUNWIND_LINK_FLAGS "-rtlib=compiler-rt")
endif()
add_compile_flags_if_supported(-Werror=return-type)
# Get warning flags
add_compile_flags_if_supported(-W)
add_compile_flags_if_supported(-Wall)
add_compile_flags_if_supported(-Wchar-subscripts)
add_compile_flags_if_supported(-Wconversion)
add_compile_flags_if_supported(-Wmismatched-tags)
add_compile_flags_if_supported(-Wmissing-braces)
add_compile_flags_if_supported(-Wnewline-eof)
add_compile_flags_if_supported(-Wno-unused-function)
add_compile_flags_if_supported(-Wshadow)
add_compile_flags_if_supported(-Wshorten-64-to-32)
add_compile_flags_if_supported(-Wsign-compare)
add_compile_flags_if_supported(-Wsign-conversion)
add_compile_flags_if_supported(-Wstrict-aliasing=2)
add_compile_flags_if_supported(-Wstrict-overflow=4)
add_compile_flags_if_supported(-Wunused-parameter)
add_compile_flags_if_supported(-Wunused-variable)
add_compile_flags_if_supported(-Wwrite-strings)
add_compile_flags_if_supported(-Wundef)
if (LIBUNWIND_ENABLE_WERROR)
add_compile_flags_if_supported(-Werror)
add_compile_flags_if_supported(-WX)
else()
add_compile_flags_if_supported(-Wno-error)
add_compile_flags_if_supported(-WX-)
endif()
if (LIBUNWIND_ENABLE_PEDANTIC)
add_compile_flags_if_supported(-pedantic)
endif()
# Get feature flags.
# Exceptions
# Catches C++ exceptions only and tells the compiler to assume that extern C
# functions never throw a C++ exception.
add_cxx_compile_flags_if_supported(-fstrict-aliasing)
add_cxx_compile_flags_if_supported(-EHsc)
# Don't run the linker in this CMake check.
#
# The reason why this was added is that when building libunwind for
# ARM Linux, we need to pass the -funwind-tables flag in order for it to
# work properly with ARM EHABI.
#
# However, when performing CMake checks, adding this flag causes the check
# to produce a false negative, because the compiler generates calls
# to __aeabi_unwind_cpp_pr0, which is defined in libunwind itself,
# which isn't built yet, so the linker complains about undefined symbols.
#
# This leads to libunwind not being built with this flag, which makes
# libunwind quite useless in this setup.
set(_previous_CMAKE_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
add_compile_flags_if_supported(-funwind-tables)
set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_previous_CMAKE_TRY_COMPILE_TARGET_TYPE})
if (LIBUNWIND_USES_ARM_EHABI AND NOT LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG)
message(SEND_ERROR "The -funwind-tables flag must be supported "
"because this target uses ARM Exception Handling ABI")
endif()
add_cxx_compile_flags_if_supported(-fno-exceptions)
add_cxx_compile_flags_if_supported(-fno-rtti)
# Ensure that we don't depend on C++ standard library.
if (LIBUNWIND_HAS_NOSTDINCXX_FLAG)
list(APPEND LIBUNWIND_COMPILE_FLAGS -nostdinc++)
# Remove -stdlib flags to prevent them from causing an unused flag warning.
string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
endif()
# Assert
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if (LIBUNWIND_ENABLE_ASSERTIONS)
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
if (NOT MSVC)
add_compile_flags(-D_DEBUG)
endif()
# On Release builds cmake automatically defines NDEBUG, so we
# explicitly undefine it:
if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
add_compile_flags(-UNDEBUG)
endif()
else()
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
add_compile_flags(-DNDEBUG)
endif()
endif()
# Cross-unwinding
if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING)
add_compile_flags(-D_LIBUNWIND_IS_NATIVE_ONLY)
endif()
# Threading-support
if (NOT LIBUNWIND_ENABLE_THREADS)
add_compile_flags(-D_LIBUNWIND_HAS_NO_THREADS)
endif()
# ARM WMMX register support
if (LIBUNWIND_ENABLE_ARM_WMMX)
# __ARM_WMMX is a compiler pre-define (as per the ACLE 2.0). Clang does not
# define this macro for any supported target at present. Therefore, here we
# provide the option to explicitly enable support for WMMX registers in the
# unwinder.
add_compile_flags(-D__ARM_WMMX)
endif()
# This is the _ONLY_ place where add_definitions is called.
if (MSVC)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif()
# Disable DLL annotations on Windows for static builds.
if (WIN32 AND LIBUNWIND_ENABLE_STATIC AND NOT LIBUNWIND_ENABLE_SHARED)
add_definitions(-D_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
endif()
if (LIBUNWIND_HAS_COMMENT_LIB_PRAGMA)
if (LIBUNWIND_HAS_DL_LIB)
add_definitions(-D_LIBUNWIND_LINK_DL_LIB)
endif()
if (LIBUNWIND_HAS_PTHREAD_LIB)
add_definitions(-D_LIBUNWIND_LINK_PTHREAD_LIB)
endif()
endif()
#===============================================================================
# Setup Source Code
#===============================================================================
include_directories(include)
add_subdirectory(src)
if (LIBUNWIND_INCLUDE_DOCS)
add_subdirectory(docs)
endif()
if (EXISTS ${LLVM_CMAKE_PATH})
add_subdirectory(test)
endif()