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llvm-capstone/libcxxabi/CMakeLists.txt
Nico Weber 297ec32b86 Move _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS macro to build system 
_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS is currently used to
bring back std::unexpected, which is removed in C++17, but still needed
for libc++abi for backward compatibility.

This macro used to define in cxa_exception.cpp only, but actually
needed for all sources that touches exceptions.
So, a build-system-level macro is better fit to define this macro.

https://reviews.llvm.org/D46056
Patch from Taiju Tsuiku <tzik@chromium.org>!

llvm-svn: 331150
2018-04-29 23:05:11 +00:00

470 lines
18 KiB
CMake
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# See www/CMake.html for instructions on how to build libcxxabi with CMake.
#===============================================================================
# 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"
${CMAKE_MODULE_PATH}
)
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
project(libcxxabi CXX C)
set(PACKAGE_NAME libcxxabi)
set(PACKAGE_VERSION 7.0.0svn)
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
# Find the LLVM sources and simulate LLVM CMake options.
include(HandleOutOfTreeLLVM)
endif()
# Require out of source build.
include(MacroEnsureOutOfSourceBuild)
MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
"${PROJECT_NAME} requires an out of source build. Please create a separate
build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there."
)
#===============================================================================
# Setup CMake Options
#===============================================================================
include(CMakeDependentOption)
include(HandleCompilerRT)
# Define options.
option(LIBCXXABI_ENABLE_EXCEPTIONS "Use exceptions." ON)
option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF)
option(LIBCXXABI_ENABLE_STATIC_UNWINDER "Statically link the LLVM unwinder." OFF)
option(LIBCXXABI_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
option(LIBCXXABI_ENABLE_THREADS "Build with threads enabled" ON)
option(LIBCXXABI_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF)
option(LIBCXXABI_HAS_EXTERNAL_THREAD_API
"Build libc++abi with an externalized threading API.
This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON." OFF)
option(LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY
"Build libc++abi with an externalized threading library.
This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON" OFF)
# FIXME: This option should default to off. Unfortunatly GCC 4.9 fails to link
# programs to due undefined references to new/delete in libc++abi. Once this
# has been fixed or worked around the default value should be changed.
option(LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS
"Build libc++abi with definitions for operator new/delete. Normally libc++
provides these definitions" ON)
option(LIBCXXABI_BUILD_32_BITS "Build 32 bit libc++abi." ${LLVM_BUILD_32_BITS})
option(LIBCXXABI_INCLUDE_TESTS "Generate build targets for the libc++abi unit tests." ${LLVM_INCLUDE_TESTS})
set(LIBCXXABI_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
"Define suffix of library directory name (32/64)")
option(LIBCXXABI_INSTALL_LIBRARY "Install the libc++abi library." ON)
set(LIBCXXABI_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.")
set(LIBCXXABI_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
set(LIBCXXABI_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
set(LIBCXXABI_LIBCXX_LIBRARY_PATH "" CACHE PATH "The path to libc++ library.")
# Default to building a shared library so that the default options still test
# the libc++abi that is being built. There are two problems with testing a
# static libc++abi. In the case of a standalone build, the tests will link the
# system's libc++, which might not have been built against our libc++abi. In the
# case of an in tree build, libc++ will prefer a dynamic libc++abi from the
# system over a static libc++abi from the output directory.
option(LIBCXXABI_ENABLE_SHARED "Build libc++abi as a shared library." ON)
option(LIBCXXABI_ENABLE_STATIC "Build libc++abi as a static library." ON)
option(LIBCXXABI_BAREMETAL "Build libc++abi for baremetal targets." OFF)
# The default terminate handler attempts to demangle uncaught exceptions, which
# causes extra I/O and demangling code to be pulled in.
option(LIBCXXABI_SILENT_TERMINATE "Set this to make the terminate handler default to a silent alternative" OFF)
if (NOT LIBCXXABI_ENABLE_SHARED AND NOT LIBCXXABI_ENABLE_STATIC)
message(FATAL_ERROR "libc++abi must be built as either a shared or static library.")
endif()
if (LLVM_EXTERNAL_LIBCXX_SOURCE_DIR)
set(LIBCXXABI_LIBCXX_SRC_DIRS ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR})
else()
set(LIBCXXABI_LIBCXX_SRC_DIRS
"${LLVM_MAIN_SRC_DIR}/projects/libcxx"
"${LLVM_MAIN_SRC_DIR}/runtimes/libcxx"
"${LLVM_MAIN_SRC_DIR}/../libcxx"
)
endif()
set(LIBCXXABI_LIBCXX_INCLUDE_DIRS "")
foreach(dir ${LIBCXXABI_LIBCXX_SRC_DIRS})
list(APPEND LIBCXXABI_LIBCXX_INCLUDE_DIRS "${dir}/include")
endforeach()
find_path(
LIBCXXABI_LIBCXX_INCLUDES
vector
PATHS ${LIBCXXABI_LIBCXX_INCLUDES}
${LIBCXXABI_LIBCXX_PATH}/include
${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBCXX_INCLUDES}
${LIBCXXABI_LIBCXX_INCLUDE_DIRS}
${LLVM_INCLUDE_DIR}/c++/v1
NO_CMAKE_FIND_ROOT_PATH
)
set(LIBCXXABI_LIBCXX_INCLUDES "${LIBCXXABI_LIBCXX_INCLUDES}" CACHE PATH
"Specify path to libc++ includes." FORCE)
find_path(
LIBCXXABI_LIBCXX_PATH
utils/libcxx/test/__init__.py
PATHS ${LIBCXXABI_LIBCXX_PATH}
${LIBCXXABI_LIBCXX_INCLUDES}/../
${LIBCXXABI_LIBCXX_SRC_DIRS}
NO_DEFAULT_PATH
NO_CMAKE_FIND_ROOT_PATH
)
if (LIBCXXABI_LIBCXX_PATH STREQUAL "LIBCXXABI_LIBCXX_PATH-NOTFOUND")
message(WARNING "LIBCXXABI_LIBCXX_PATH was not specified and couldn't be infered.")
set(LIBCXXABI_LIBCXX_PATH "")
endif()
set(LIBCXXABI_LIBCXX_PATH "${LIBCXXABI_LIBCXX_PATH}" CACHE PATH
"Specify path to libc++ source." FORCE)
#===============================================================================
# Configure System
#===============================================================================
# Add path for custom modules
set(CMAKE_MODULE_PATH
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
${CMAKE_MODULE_PATH}
)
set(LIBCXXABI_COMPILER ${CMAKE_CXX_COMPILER})
set(LIBCXXABI_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(LIBCXXABI_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
if (LLVM_LIBRARY_OUTPUT_INTDIR)
set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
else()
set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX})
endif()
set(LIBCXXABI_INSTALL_PREFIX "" CACHE STRING
"Define libc++abi destination prefix.")
if (NOT LIBCXXABI_INSTALL_PREFIX MATCHES "^$|.*/")
message(FATAL_ERROR "LIBCXXABI_INSTALL_PREFIX has to end with \"/\".")
endif()
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
# By default, for non-standalone builds, libcxx and libcxxabi share a library
# directory.
if (NOT LIBCXXABI_LIBCXX_LIBRARY_PATH)
set(LIBCXXABI_LIBCXX_LIBRARY_PATH "${LIBCXXABI_LIBRARY_DIR}" CACHE PATH
"The path to libc++ library.")
endif()
# Check that we can build with 32 bits if requested.
if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
if (LIBCXXABI_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(LIBCXXABI_BUILD_32_BITS)
message(FATAL_ERROR "LIBCXXABI_BUILD_32_BITS=ON is not supported on this platform.")
endif()
# Declare libc++abi configuration variables.
# They are intended for use as follows:
# LIBCXXABI_C_FLAGS: General flags for both the c++ compiler and linker.
# LIBCXXABI_CXX_FLAGS: General flags for both the c++ compiler and linker.
# LIBCXXABI_COMPILE_FLAGS: Compile only flags.
# LIBCXXABI_LINK_FLAGS: Linker only flags.
# LIBCXXABI_LIBRARIES: libraries libc++abi is linked to.
set(LIBCXXABI_C_FLAGS "")
set(LIBCXXABI_CXX_FLAGS "")
set(LIBCXXABI_COMPILE_FLAGS "")
set(LIBCXXABI_LINK_FLAGS "")
set(LIBCXXABI_LIBRARIES "")
# Include macros for adding and removing libc++abi flags.
include(HandleLibcxxabiFlags)
#===============================================================================
# Setup Compiler Flags
#===============================================================================
# Configure target flags
add_target_flags_if(LIBCXXABI_BUILD_32_BITS "-m32")
add_target_flags_if(LIBCXXABI_TARGET_TRIPLE
"--target=${LIBCXXABI_TARGET_TRIPLE}")
add_target_flags_if(LIBCXXABI_GCC_TOOLCHAIN
"--gcc-toolchain=${LIBCXXABI_GCC_TOOLCHAIN}")
add_target_flags_if(LIBCXXABI_SYSROOT
"--sysroot=${LIBCXXABI_SYSROOT}")
if (LIBCXXABI_TARGET_TRIPLE)
set(TARGET_TRIPLE "${LIBCXXABI_TARGET_TRIPLE}")
endif()
# Configure compiler. Must happen after setting the target flags.
include(config-ix)
if (LIBCXXABI_HAS_NOSTDINCXX_FLAG)
list(APPEND LIBCXXABI_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()
if (LIBCXXABI_USE_COMPILER_RT)
list(APPEND LIBCXXABI_LINK_FLAGS "-rtlib=compiler-rt")
endif()
# Let the library headers know they are currently being used to build the
# library.
add_definitions(-D_LIBCXXABI_BUILDING_LIBRARY)
# Disable DLL annotations on Windows for static builds.
if (WIN32 AND LIBCXXABI_ENABLE_STATIC AND NOT LIBCXXABI_ENABLE_SHARED)
add_definitions(-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
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(-Wunused-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 (LIBCXXABI_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 (LIBCXXABI_ENABLE_PEDANTIC)
add_compile_flags_if_supported(-pedantic)
endif()
# Get feature flags.
add_compile_flags_if_supported(-fstrict-aliasing)
# Exceptions
if (LIBCXXABI_ENABLE_EXCEPTIONS)
# Catches C++ exceptions only and tells the compiler to assume that extern C
# functions never throw a C++ exception.
add_compile_flags_if_supported(-EHsc)
# Do we really need to be run through the C compiler ?
add_c_compile_flags_if_supported(-funwind-tables)
else()
add_definitions(-D_LIBCXXABI_NO_EXCEPTIONS)
add_compile_flags_if_supported(-fno-exceptions)
add_compile_flags_if_supported(-EHs-)
add_compile_flags_if_supported(-EHa-)
endif()
# Assert
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if (LIBCXXABI_ENABLE_ASSERTIONS)
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
if (NOT MSVC)
list(APPEND LIBCXXABI_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 LIBCXXABI_COMPILE_FLAGS -UNDEBUG)
endif()
else()
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
list(APPEND LIBCXXABI_COMPILE_FLAGS -DNDEBUG)
endif()
endif()
# Static library
if (NOT LIBCXXABI_ENABLE_SHARED)
list(APPEND LIBCXXABI_COMPILE_FLAGS -D_LIBCPP_BUILD_STATIC)
endif()
# Threading
if (NOT LIBCXXABI_ENABLE_THREADS)
if (LIBCXXABI_HAS_PTHREAD_API)
message(FATAL_ERROR "LIBCXXABI_HAS_PTHREAD_API can only"
" be set to ON when LIBCXXABI_ENABLE_THREADS"
" is also set to ON.")
endif()
if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
message(FATAL_ERROR "LIBCXXABI_HAS_EXTERNAL_THREAD_API can only"
" be set to ON when LIBCXXABI_ENABLE_THREADS"
" is also set to ON.")
endif()
if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY)
message(FATAL_ERROR "LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY can only"
" be set to ON when LIBCXXABI_ENABLE_THREADS"
" is also set to ON.")
endif()
add_definitions(-D_LIBCXXABI_HAS_NO_THREADS)
endif()
if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
if (LIBCXXABI_HAS_PTHREAD_API)
message(FATAL_ERROR "The options LIBCXXABI_HAS_EXTERNAL_THREAD_API"
" and LIBCXXABI_HAS_PTHREAD_API cannot be both"
" set to ON at the same time.")
endif()
if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY)
message(FATAL_ERROR "The options LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY"
" and LIBCXXABI_HAS_EXTERNAL_THREAD_API cannot be both"
" set to ON at the same time.")
endif()
endif()
if (LLVM_ENABLE_MODULES)
# Ignore that the rest of the modules flags are now unused.
add_compile_flags_if_supported(-Wno-unused-command-line-argument)
add_compile_flags(-fno-modules)
endif()
set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS OFF)
if ((NOT LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS)
OR (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXXABI_ENABLE_SHARED)
OR MINGW)
set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS ON)
endif()
if (LIBCXXABI_HAS_UNDEFINED_SYMBOLS)
# Need to allow unresolved symbols if this is to work with shared library builds
if (APPLE)
list(APPEND LIBCXXABI_LINK_FLAGS "-undefined dynamic_lookup")
else()
# Relax this restriction from HandleLLVMOptions
string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
endif()
endif()
if (LIBCXXABI_HAS_PTHREAD_API)
add_definitions(-D_LIBCPP_HAS_THREAD_API_PTHREAD)
endif()
if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
add_definitions(-D_LIBCPP_HAS_THREAD_API_EXTERNAL)
endif()
if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY)
add_definitions(-D_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL)
endif()
# Prevent libc++abi from having library dependencies on libc++
add_definitions(-D_LIBCPP_DISABLE_EXTERN_TEMPLATE)
# Bring back `std::unexpected`, which is removed in C++17, to support
# pre-C++17.
add_definitions(-D_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS)
if (MSVC)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif()
# Define LIBCXXABI_USE_LLVM_UNWINDER for conditional compilation.
if (LIBCXXABI_USE_LLVM_UNWINDER)
add_definitions(-DLIBCXXABI_USE_LLVM_UNWINDER)
endif()
if (LIBCXXABI_SILENT_TERMINATE)
add_definitions(-DLIBCXXABI_SILENT_TERMINATE)
endif()
if (LIBCXXABI_BAREMETAL)
add_definitions(-DLIBCXXABI_BAREMETAL)
endif()
string(REPLACE ";" " " LIBCXXABI_CXX_FLAGS "${LIBCXXABI_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FLAGS}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}")
#===============================================================================
# Setup Source Code
#===============================================================================
set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH
"Specify path to libunwind includes." FORCE)
set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH
"Specify path to libunwind source." FORCE)
include_directories(include)
if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM)
find_path(
LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL
libunwind.h
PATHS ${LIBCXXABI_LIBUNWIND_INCLUDES}
${LIBCXXABI_LIBUNWIND_PATH}/include
${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBUNWIND_INCLUDES}
${LLVM_MAIN_SRC_DIR}/projects/libunwind/include
${LLVM_MAIN_SRC_DIR}/runtimes/libunwind/include
${LLVM_MAIN_SRC_DIR}/../libunwind/include
NO_DEFAULT_PATH
NO_CMAKE_FIND_ROOT_PATH
)
if (LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL-NOTFOUND")
set(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL "")
endif()
if (NOT LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "")
include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}")
endif()
endif()
# Add source code. This also contains all of the logic for deciding linker flags
# soname, etc...
add_subdirectory(src)
if (LIBCXXABI_INCLUDE_TESTS)
if (LIBCXXABI_STANDALONE_BUILD AND NOT LIBCXXABI_ENABLE_SHARED)
# We can't reasonably test the system C++ library with a static
# libc++abi. We either need to be able to replace libc++abi at
# run time (with a shared libc++abi), or we need to be able to
# replace the C++ runtime (with a non- standalone build).
message(WARNING "The libc++abi tests aren't valid when libc++abi "
"is built standalone (i.e. outside of "
"llvm/projects/libcxxabi ) and is built without "
"a shared library. Either build a shared "
"library, build libc++abi at the same time as "
"you build libc++, or do without testing. No "
"check target will be available!")
else()
add_subdirectory(test)
add_subdirectory(fuzz)
endif()
endif()
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