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#===============================================================================
# Setup Project
#===============================================================================
cmake_minimum_required(VERSION 3.4.3)
if (POLICY CMP0042)
cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
endif()
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
project(libunwind)
# Rely on llvm-config.
set(CONFIG_OUTPUT)
find_program(LLVM_CONFIG "llvm-config")
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)
message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}")
set(CONFIG_COMMAND ${LLVM_CONFIG} "--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 ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
else()
message(FATAL_ERROR "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 ${LLVM_CMAKE_PATH})
list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
include("${LLVM_CMAKE_PATH}/AddLLVM.cmake")
include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake")
else()
message(FATAL_ERROR "Not found: ${LLVM_CMAKE_PATH}")
endif()
set(PACKAGE_NAME libunwind)
set(PACKAGE_VERSION 4.0.0svn)
set(PACKAGE_STRING "${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_MAIN_SRC_DIR "${CMAKE_SOURCE_DIR}" CACHE PATH "Path to LLVM source tree")
set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py")
endif()
#===============================================================================
# Setup CMake Options
#===============================================================================
# Define options.
option(LIBUNWIND_BUILD_32_BITS "Build 32 bit libunwind" ${LLVM_BUILD_32_BITS})
option(LIBUNWIND_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
option(LIBUNWIND_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
option(LIBUNWIND_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON)
option(LIBUNWIND_ENABLE_STATIC "Build libunwind as a static library." ON)
option(LIBUNWIND_ENABLE_CROSS_UNWINDING "Enable cross-platform unwinding support." OFF)
option(LIBUNWIND_ENABLE_ARM_WMMX "Enable unwinding support for ARM WMMX registers." OFF)
set(LIBUNWIND_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.")
set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
set(LIBUNWIND_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
if (NOT LIBUNWIND_ENABLE_SHARED AND NOT LIBUNWIND_ENABLE_STATIC)
message(FATAL_ERROR "libunwind must be built as either a shared or static library.")
endif()
# Check that we can build with 32 bits if requested.
if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
if (LIBUNWIND_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
message(STATUS "Building 32 bits executables and libraries.")
endif()
elseif(LIBUNWIND_BUILD_32_BITS)
message(FATAL_ERROR "LIBUNWIND_BUILD_32_BITS=ON is not supported on this platform.")
endif()
#===============================================================================
# Configure System
#===============================================================================
# Add path for custom modules
set(CMAKE_MODULE_PATH
"${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})
set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
set(LIBUNWIND_C_FLAGS "")
set(LIBUNWIND_CXX_FLAGS "")
set(LIBUNWIND_COMPILE_FLAGS "")
set(LIBUNWIND_LINK_FLAGS "")
# Get required flags.
macro(append_if list condition var)
if (${condition})
list(APPEND ${list} ${var})
endif()
endmacro()
macro(add_target_flags_if condition var)
if (${condition})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${var}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${var}")
list(APPEND LINUNWIND_COMPILE_FLAGS ${var})
list(APPEND LIBUNWIND_LINK_FLAGS ${var})
endif()
endmacro()
add_target_flags_if(LIBUNWIND_BUILD_32_BITS "-m32")
add_target_flags_if(LIBUNWIND_TARGET_TRIPLE
"-target ${LIBUNWIND_TARGET_TRIPLE}")
add_target_flags_if(LIBUNWIND_GCC_TOOLCHAIN
"-gcc-toolchain ${LIBUNWIND_GCC_TOOLCHAIN}")
add_target_flags_if(LIBUNWIND_SYSROOT
"--sysroot=${LIBUNWIND_SYSROOT}")
# Configure compiler.
include(config-ix)
#===============================================================================
# Setup Compiler Flags
#===============================================================================
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WERROR_FLAG -Werror=return-type)
# Get warning flags
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_W_FLAG -W)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WALL_FLAG -Wall)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WCHAR_SUBSCRIPTS_FLAG -Wchar-subscripts)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WCONVERSION_FLAG -Wconversion)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WMISMATCHED_TAGS_FLAG -Wmismatched-tags)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WMISSING_BRACES_FLAG -Wmissing-braces)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNEWLINE_EOF_FLAG -Wnewline-eof)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNO_UNUSED_FUNCTION_FLAG -Wno-unused-function)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSHADOW_FLAG -Wshadow)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSHORTEN_64_TO_32_FLAG -Wshorten-64-to-32)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSIGN_COMPARE_FLAG -Wsign-compare)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSIGN_CONVERSION_FLAG -Wsign-conversion)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSTRICT_ALIASING_FLAG -Wstrict-aliasing=2)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSTRICT_OVERFLOW_FLAG -Wstrict-overflow=4)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNUSED_PARAMETER_FLAG -Wunused-parameter)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNUSED_VARIABLE_FLAG -Wunused-variable)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNDEF_FLAG -Wundef)
if (LIBUNWIND_ENABLE_WERROR)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WERROR_FLAG -Werror)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WX_FLAG -WX)
else()
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNO_ERROR_FLAG -Wno-error)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_NO_WX_FLAG -WX-)
endif()
if (LIBUNWIND_ENABLE_PEDANTIC)
append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_PEDANTIC_FLAG -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.
append_if(LIBUNWIND_CXX_FLAGS LIBUNWIND_HAS_FSTRICT_ALIASING_FLAG -fstrict-aliasing)
append_if(LIBUNWIND_CXX_FLAGS LIBUNWIND_HAS_EHSC_FLAG -EHsc)
append_if(LIBUNWIND_C_FLAGS LIBUNWIND_HAS_FUNWIND_TABLES -funwind-tables)
# 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)
list(APPEND LIBUNWIND_COMPILE_FLAGS -D_DEBUG)
endif()
# On Release builds cmake automatically defines NDEBUG, so we
# explicitly undefine it:
if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
list(APPEND LIBUNWIND_COMPILE_FLAGS -UNDEBUG)
endif()
else()
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
list(APPEND LIBUNWIND_COMPILE_FLAGS -DNDEBUG)
endif()
endif()
# Cross-unwinding
if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING)
list(APPEND LIBUNWIND_COMPILE_FLAGS -D_LIBUNWIND_IS_NATIVE_ONLY)
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.
list(APPEND LIBUNWIND_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()
#===============================================================================
# Setup Source Code
#===============================================================================
include_directories(include)
add_subdirectory(src)