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llvm-project/libcxx/CMakeLists.txt

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CMake
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# See https://libcxx.llvm.org/docs/BuildingLibcxx.html for instructions on how
# to build libcxx with CMake.
if (NOT IS_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/../libcxxabi")
message(FATAL_ERROR "libc++ now requires being built in a monorepo layout with libcxxabi available")
endif()
#===============================================================================
# Setup Project
#===============================================================================
cmake_minimum_required(VERSION 3.13.4)
if(POLICY CMP0042)
cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
endif()
if(POLICY CMP0022)
cmake_policy(SET CMP0022 NEW) # Required when interacting with LLVM and Clang
endif()
if(POLICY CMP0068)
cmake_policy(SET CMP0068 NEW)
set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
endif()
# Add path for custom modules
set(CMAKE_MODULE_PATH
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
${CMAKE_MODULE_PATH}
)
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBCXX_STANDALONE_BUILD)
project(libcxx CXX C)
set(PACKAGE_NAME libcxx)
set(PACKAGE_VERSION 12.0.0git)
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
# Find the LLVM sources and simulate LLVM CMake options.
include(HandleOutOfTreeLLVM)
endif()
if (LIBCXX_STANDALONE_BUILD)
if(CMAKE_VERSION VERSION_LESS 3.12)
include(FindPythonInterp)
if( NOT PYTHONINTERP_FOUND )
message(WARNING "Failed to find python interpreter. "
"The libc++ test suite will be disabled.")
set(LLVM_INCLUDE_TESTS OFF)
else()
add_executable(Python3::Interpreter IMPORTED)
set_target_properties(Python3::Interpreter PROPERTIES
IMPORTED_LOCATION ${PYTHON_EXECUTABLE})
set(Python3_EXECUTABLE ${PYTHON_EXECUTABLE})
endif()
else()
find_package(Python3 COMPONENTS Interpreter)
if(NOT Python3_Interpreter_FOUND)
message(WARNING "Python3 not found, using python2 as a fallback")
find_package(Python2 COMPONENTS Interpreter REQUIRED)
if(Python2_VERSION VERSION_LESS 2.7)
message(SEND_ERROR "Python 2.7 or newer is required")
endif()
# Treat python2 as python3
add_executable(Python3::Interpreter IMPORTED)
set_target_properties(Python3::Interpreter PROPERTIES
IMPORTED_LOCATION ${Python2_EXECUTABLE})
set(Python3_EXECUTABLE ${Python2_EXECUTABLE})
endif()
endif()
endif()
# Require out of source build.
include(MacroEnsureOutOfSourceBuild)
MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
"${PROJECT_NAME} requires an out of source build. Please create a separate
build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there."
)
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" AND "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
message(STATUS "Configuring for clang-cl")
set(LIBCXX_TARGETING_CLANG_CL ON)
endif()
if (MSVC)
set(LIBCXX_TARGETING_MSVC ON)
message(STATUS "Configuring for MSVC")
else()
set(LIBCXX_TARGETING_MSVC OFF)
endif()
#===============================================================================
# Setup CMake Options
#===============================================================================
include(CMakeDependentOption)
include(HandleCompilerRT)
# Basic options ---------------------------------------------------------------
option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." OFF)
option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
option(LIBCXX_ENABLE_STATIC "Build libc++ as a static library." ON)
option(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY "Build libc++experimental.a" ON)
set(ENABLE_FILESYSTEM_DEFAULT ON)
if (WIN32)
set(ENABLE_FILESYSTEM_DEFAULT OFF)
endif()
option(LIBCXX_ENABLE_FILESYSTEM "Build filesystem as part of the main libc++ library"
${ENABLE_FILESYSTEM_DEFAULT})
option(LIBCXX_INCLUDE_TESTS "Build the libc++ tests." ${LLVM_INCLUDE_TESTS})
option(LIBCXX_ENABLE_PARALLEL_ALGORITHMS "Enable the parallel algorithms library. This requires the PSTL to be available." OFF)
option(LIBCXX_TEST_GDB_PRETTY_PRINTERS "Test gdb pretty printers." OFF)
set(LIBCXX_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/configs/legacy.cfg.in" CACHE STRING
"The Lit testing configuration to use when running the tests." FORCE) # TODO: Stop using 'FORCE' once we can assume all CMake build dirs have been re-generated
set(LIBCXX_TEST_PARAMS "" CACHE STRING
"A list of parameters to run the Lit test suite with.")
# Benchmark options -----------------------------------------------------------
option(LIBCXX_INCLUDE_BENCHMARKS "Build the libc++ benchmarks and their dependencies" ON)
set(LIBCXX_BENCHMARK_TEST_ARGS_DEFAULT --benchmark_min_time=0.01)
set(LIBCXX_BENCHMARK_TEST_ARGS "${LIBCXX_BENCHMARK_TEST_ARGS_DEFAULT}" CACHE STRING
"Arguments to pass when running the benchmarks using check-cxx-benchmarks")
set(LIBCXX_BENCHMARK_NATIVE_STDLIB "" CACHE STRING
"Build the benchmarks against the specified native STL.
The value must be one of libc++/libstdc++")
set(LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN "" CACHE STRING
"Use alternate GCC toolchain when building the native benchmarks")
if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
if (NOT (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++"
OR LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++"))
message(FATAL_ERROR "Invalid value for LIBCXX_BENCHMARK_NATIVE_STDLIB: "
"'${LIBCXX_BENCHMARK_NATIVE_STDLIB}'")
endif()
endif()
option(LIBCXX_INCLUDE_DOCS "Build the libc++ documentation." ${LLVM_INCLUDE_DOCS})
set(LIBCXX_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
"Define suffix of library directory name (32/64)")
option(LIBCXX_INSTALL_HEADERS "Install the libc++ headers." ON)
option(LIBCXX_INSTALL_LIBRARY "Install the libc++ library." ON)
cmake_dependent_option(LIBCXX_INSTALL_STATIC_LIBRARY
"Install the static libc++ library." ON
"LIBCXX_ENABLE_STATIC;LIBCXX_INSTALL_LIBRARY" OFF)
cmake_dependent_option(LIBCXX_INSTALL_SHARED_LIBRARY
"Install the shared libc++ library." ON
"LIBCXX_ENABLE_SHARED;LIBCXX_INSTALL_LIBRARY" OFF)
option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON)
cmake_dependent_option(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY
"Install libc++experimental.a" ON
"LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY;LIBCXX_INSTALL_LIBRARY" OFF)
set(LIBCXX_ABI_VERSION "1" CACHE STRING "ABI version of libc++. Can be either 1 or 2, where 2 is currently not stable. Defaults to 1.")
set(LIBCXX_ABI_NAMESPACE "" CACHE STRING "The inline ABI namespace used by libc++. It defaults to __n where `n` is the current ABI version.")
option(LIBCXX_ABI_UNSTABLE "Unstable ABI of libc++." OFF)
option(LIBCXX_ABI_FORCE_ITANIUM "Ignore auto-detection and force use of the Itanium ABI.")
option(LIBCXX_ABI_FORCE_MICROSOFT "Ignore auto-detection and force use of the Microsoft ABI.")
set(LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION "" CACHE STRING "The implementation of typeinfo comparison to use.")
set(TYPEINFO_COMPARISON_VALUES ";1;2")
set_property(CACHE LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION PROPERTY STRINGS ${TYPEINFO_COMPARISON_VALUES})
list(FIND TYPEINFO_COMPARISON_VALUES "${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}" IS_VALID_DEFAULT)
if (${IS_VALID_DEFAULT} EQUAL -1)
message(FATAL_ERROR "Value '${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}' is not a valid value for
LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION")
endif()
option(LIBCXX_HIDE_FROM_ABI_PER_TU_BY_DEFAULT "Enable per TU ABI insulation by default. To be used by vendors." OFF)
set(LIBCXX_ABI_DEFINES "" CACHE STRING "A semicolon separated list of ABI macros to define in the site config header.")
option(LIBCXX_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
set(LIBCXX_LIBCPPABI_VERSION "2" CACHE STRING "Version of libc++abi's ABI to re-export from libc++ when re-exporting is enabled.
Note that this is not related to the version of libc++'s ABI itself!")
# ABI Library options ---------------------------------------------------------
set(LIBCXX_CXX_ABI "default" CACHE STRING "Specify C++ ABI library to use.")
set(CXXABIS none default libcxxabi libcxxrt libstdc++ libsupc++ vcruntime)
set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS})
# Setup the default options if LIBCXX_CXX_ABI is not specified.
if (LIBCXX_CXX_ABI STREQUAL "default")
if (LIBCXX_TARGETING_MSVC)
# FIXME: Figure out how to configure the ABI library on Windows.
set(LIBCXX_CXX_ABI_LIBNAME "vcruntime")
elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
set(LIBCXX_CXX_ABI_LIBNAME "libcxxrt")
elseif (NOT LIBCXX_STANDALONE_BUILD OR HAVE_LIBCXXABI)
set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi")
else()
set(LIBCXX_CXX_ABI_LIBNAME "default")
endif()
else()
set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}")
endif()
option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY
"Use a static copy of the ABI library when linking libc++.
This option cannot be used with LIBCXX_ENABLE_ABI_LINKER_SCRIPT." OFF)
cmake_dependent_option(LIBCXX_STATICALLY_LINK_ABI_IN_STATIC_LIBRARY
"Statically link the ABI library to static library" ON
"LIBCXX_ENABLE_STATIC_ABI_LIBRARY;LIBCXX_ENABLE_STATIC" OFF)
cmake_dependent_option(LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY
"Statically link the ABI library to shared library" ON
"LIBCXX_ENABLE_STATIC_ABI_LIBRARY;LIBCXX_ENABLE_SHARED" OFF)
# Generate and install a linker script inplace of libc++.so. The linker script
# will link libc++ to the correct ABI library. This option is on by default
# on UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY'
# is on. This option is also disabled when the ABI library is not specified
# or is specified to be "none".
set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF)
if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY
AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"
AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "default"
AND Python3_EXECUTABLE
AND LIBCXX_ENABLE_SHARED)
set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON)
endif()
option(LIBCXX_ENABLE_ABI_LINKER_SCRIPT
"Use and install a linker script for the given ABI library"
${ENABLE_LINKER_SCRIPT_DEFAULT_VALUE})
option(LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS
"Build libc++ with definitions for operator new/delete. This option can
be used to disable the definitions when libc++abi is expected to provide
them" ON)
# Build libc++abi with libunwind. We need this option to determine whether to
# link with libunwind or libgcc_s while running the test cases.
option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF)
# Target options --------------------------------------------------------------
option(LIBCXX_BUILD_32_BITS "Build 32 bit libc++." ${LLVM_BUILD_32_BITS})
set(LIBCXX_TARGET_TRIPLE "" CACHE STRING "Use alternate target triple.")
set(LIBCXX_SYSROOT "" CACHE STRING "Use alternate sysroot.")
set(LIBCXX_GCC_TOOLCHAIN "" CACHE STRING "Use alternate GCC toolchain.")
# Feature options -------------------------------------------------------------
option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON)
option(LIBCXX_ENABLE_RTTI "Use run time type information." ON)
option(LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE "Build libc++ with support for the global filesystem namespace." ON)
option(LIBCXX_ENABLE_STDIN "Build libc++ with support for stdin/std::cin." ON)
option(LIBCXX_ENABLE_STDOUT "Build libc++ with support for stdout/std::cout." ON)
option(LIBCXX_ENABLE_THREADS "Build libc++ with support for threads." ON)
option(LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS "Build libc++ with support for thread-unsafe C functions" ON)
option(LIBCXX_ENABLE_MONOTONIC_CLOCK
"Build libc++ with support for a monotonic clock.
This option may only be set to OFF when LIBCXX_ENABLE_THREADS=OFF." ON)
option(LIBCXX_HAS_MUSL_LIBC "Build libc++ with support for the Musl C library" OFF)
option(LIBCXX_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF)
option(LIBCXX_HAS_WIN32_THREAD_API "Ignore auto-detection and force use of win32 thread API" OFF)
option(LIBCXX_HAS_EXTERNAL_THREAD_API
"Build libc++ with an externalized threading API.
This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON." OFF)
option(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY
"Build libc++ with an externalized threading library.
This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON" OFF)
# Misc options ----------------------------------------------------------------
# FIXME: Turn -pedantic back ON. It is currently off because it warns
# about #include_next which is used everywhere.
option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF)
option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
option(LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS "Disable #warnings about conflicting macros." OFF)
option(LIBCXX_GENERATE_COVERAGE "Enable generating code coverage." OFF)
set(LIBCXX_COVERAGE_LIBRARY "" CACHE STRING
"The Profile-rt library used to build with code coverage")
# Don't allow a user to accidentally overwrite the system libc++ installation on Darwin.
# If the user specifies -DCMAKE_INSTALL_PREFIX=/usr the install rules for libc++
# will not be generated and a warning will be issued.
option(LIBCXX_OVERRIDE_DARWIN_INSTALL "Enable overwriting darwins libc++ installation." OFF)
mark_as_advanced(LIBCXX_OVERRIDE_DARWIN_INSTALL) # Don't show this option by default.
if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND NOT LIBCXX_OVERRIDE_DARWIN_INSTALL)
if ("${CMAKE_INSTALL_PREFIX}" STREQUAL "/usr")
message(WARNING "Disabling libc++ install rules because installation would "
"overwrite the systems installation. Configure with "
"-DLIBCXX_OVERRIDE_DARWIN_INSTALL=ON to suppress this behaviour.")
mark_as_advanced(CLEAR LIBCXX_OVERRIDE_DARWIN_INSTALL) # Show the override option.
set(LIBCXX_INSTALL_HEADERS OFF)
set(LIBCXX_INSTALL_LIBRARY OFF)
endif()
endif()
set(LIBCXX_CONFIGURE_IDE_DEFAULT OFF)
if (XCODE OR MSVC_IDE)
set(LIBCXX_CONFIGURE_IDE_DEFAULT ON)
endif()
option(LIBCXX_CONFIGURE_IDE "Configure libcxx for use within an IDE"
${LIBCXX_CONFIGURE_IDE_DEFAULT})
option(LIBCXX_HERMETIC_STATIC_LIBRARY
"Do not export any symbols from the static library." OFF)
#===============================================================================
# Check option configurations
#===============================================================================
# Ensure LIBCXX_ENABLE_MONOTONIC_CLOCK is set to ON only when
# LIBCXX_ENABLE_THREADS is on.
if(LIBCXX_ENABLE_THREADS AND NOT LIBCXX_ENABLE_MONOTONIC_CLOCK)
message(FATAL_ERROR "LIBCXX_ENABLE_MONOTONIC_CLOCK can only be set to OFF"
" when LIBCXX_ENABLE_THREADS is also set to OFF.")
endif()
if(NOT LIBCXX_ENABLE_THREADS)
if(LIBCXX_HAS_PTHREAD_API)
message(FATAL_ERROR "LIBCXX_HAS_PTHREAD_API can only be set to ON"
" when LIBCXX_ENABLE_THREADS is also set to ON.")
endif()
if(LIBCXX_HAS_EXTERNAL_THREAD_API)
message(FATAL_ERROR "LIBCXX_HAS_EXTERNAL_THREAD_API can only be set to ON"
" when LIBCXX_ENABLE_THREADS is also set to ON.")
endif()
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
message(FATAL_ERROR "LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY can only be set "
"to ON when LIBCXX_ENABLE_THREADS is also set to ON.")
endif()
if (LIBCXX_HAS_WIN32_THREAD_API)
message(FATAL_ERROR "LIBCXX_HAS_WIN32_THREAD_API can only be set to ON"
" when LIBCXX_ENABLE_THREADS is also set to ON.")
endif()
endif()
if (LIBCXX_HAS_EXTERNAL_THREAD_API)
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
message(FATAL_ERROR "The options LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY and "
"LIBCXX_HAS_EXTERNAL_THREAD_API cannot both be ON at "
"the same time")
endif()
if (LIBCXX_HAS_PTHREAD_API)
message(FATAL_ERROR "The options LIBCXX_HAS_EXTERNAL_THREAD_API"
"and LIBCXX_HAS_PTHREAD_API cannot be both"
"set to ON at the same time.")
endif()
if (LIBCXX_HAS_WIN32_THREAD_API)
message(FATAL_ERROR "The options LIBCXX_HAS_EXTERNAL_THREAD_API"
"and LIBCXX_HAS_WIN32_THREAD_API cannot be both"
"set to ON at the same time.")
endif()
endif()
if (LIBCXX_HAS_PTHREAD_API)
if (LIBCXX_HAS_WIN32_THREAD_API)
message(FATAL_ERROR "The options LIBCXX_HAS_PTHREAD_API"
"and LIBCXX_HAS_WIN32_THREAD_API cannot be both"
"set to ON at the same time.")
endif()
endif()
# Ensure LLVM_USE_SANITIZER is not specified when LIBCXX_GENERATE_COVERAGE
# is ON.
if (LLVM_USE_SANITIZER AND LIBCXX_GENERATE_COVERAGE)
message(FATAL_ERROR "LLVM_USE_SANITIZER cannot be used with LIBCXX_GENERATE_COVERAGE")
endif()
# Set LIBCXX_BUILD_32_BITS to (LIBCXX_BUILD_32_BITS OR LLVM_BUILD_32_BITS)
# and check that we can build with 32 bits if requested.
if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
if (LIBCXX_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(LIBCXX_BUILD_32_BITS)
message(FATAL_ERROR "LIBCXX_BUILD_32_BITS=ON is not supported on this platform.")
endif()
# Warn users that LIBCXX_ENABLE_STATIC_ABI_LIBRARY is an experimental option.
if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
message(WARNING "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is an experimental option")
if (LIBCXX_ENABLE_STATIC AND NOT Python3_EXECUTABLE)
message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY requires python but it was not found.")
endif()
endif()
if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
if (APPLE)
message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT cannot be used on APPLE targets")
endif()
if (NOT LIBCXX_ENABLE_SHARED)
message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT is only available for shared library builds.")
endif()
endif()
if (LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
message(FATAL_ERROR "Conflicting options given.
LIBCXX_ENABLE_STATIC_ABI_LIBRARY cannot be specified with
LIBCXX_ENABLE_ABI_LINKER_SCRIPT")
endif()
if (LIBCXX_HAS_MUSL_LIBC AND NOT LIBCXX_INSTALL_SUPPORT_HEADERS)
message(FATAL_ERROR "LIBCXX_INSTALL_SUPPORT_HEADERS can not be turned off"
"when building for Musl with LIBCXX_HAS_MUSL_LIBC.")
endif()
if (LIBCXX_ABI_FORCE_ITANIUM AND LIBCXX_ABI_FORCE_MICROSOFT)
message(FATAL_ERROR "Only one of LIBCXX_ABI_FORCE_ITANIUM and LIBCXX_ABI_FORCE_MICROSOFT can be specified.")
endif ()
#===============================================================================
# Configure System
#===============================================================================
set(LIBCXX_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(LIBCXX_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
set(LIBCXX_BINARY_INCLUDE_DIR "${LIBCXX_BINARY_DIR}/include/c++build")
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
set(LIBCXX_HEADER_DIR ${LLVM_BINARY_DIR})
set(LIBCXX_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
if(LIBCXX_LIBDIR_SUBDIR)
string(APPEND LIBCXX_LIBRARY_DIR /${LIBCXX_LIBDIR_SUBDIR})
string(APPEND LIBCXX_INSTALL_LIBRARY_DIR /${LIBCXX_LIBDIR_SUBDIR})
endif()
elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
set(LIBCXX_HEADER_DIR ${LLVM_BINARY_DIR})
set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX})
else()
set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
set(LIBCXX_HEADER_DIR ${CMAKE_BINARY_DIR})
set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX})
endif()
file(MAKE_DIRECTORY "${LIBCXX_BINARY_INCLUDE_DIR}")
set(LIBCXX_INSTALL_PREFIX "" CACHE STRING "Define libc++ destination prefix.")
set(LIBCXX_INSTALL_HEADER_PREFIX "" CACHE STRING "Define libc++ header destination prefix.")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
# Declare libc++ configuration variables.
# They are intended for use as follows:
# LIBCXX_CXX_FLAGS: General flags for both the compiler and linker.
# LIBCXX_COMPILE_FLAGS: Compile only flags.
# LIBCXX_LINK_FLAGS: Linker only flags.
# LIBCXX_LIBRARIES: libraries libc++ is linked to.
set(LIBCXX_COMPILE_FLAGS "")
set(LIBCXX_LINK_FLAGS "")
set(LIBCXX_LIBRARIES "")
# Include macros for adding and removing libc++ flags.
include(HandleLibcxxFlags)
# Target flags ================================================================
# These flags get added to CMAKE_CXX_FLAGS and CMAKE_C_FLAGS so that
# 'config-ix' use them during feature checks. It also adds them to both
# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'
add_target_flags_if(LIBCXX_BUILD_32_BITS "-m32")
if(LIBCXX_TARGET_TRIPLE)
add_target_flags("--target=${LIBCXX_TARGET_TRIPLE}")
elseif(CMAKE_CXX_COMPILER_TARGET)
set(LIBCXX_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}")
endif()
if(LIBCXX_SYSROOT)
add_target_flags("--sysroot=${LIBCXX_SYSROOT}")
elseif(CMAKE_SYSROOT)
set(LIBCXX_SYSROOT "${CMAKE_SYSROOT}")
endif()
if(LIBCXX_GCC_TOOLCHAIN)
add_target_flags("--gcc-toolchain=${LIBCXX_GCC_TOOLCHAIN}")
elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN)
set(LIBCXX_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}")
endif()
if(LIBCXX_TARGET_TRIPLE)
set(TARGET_TRIPLE "${LIBCXX_TARGET_TRIPLE}")
endif()
# Configure compiler.
include(config-ix)
# Configure coverage options.
if (LIBCXX_GENERATE_COVERAGE)
include(CodeCoverage)
set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE)
endif()
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
set(LIBCXX_DEBUG_BUILD ON)
else()
set(LIBCXX_DEBUG_BUILD OFF)
endif()
#===============================================================================
# Setup Compiler Flags
#===============================================================================
include(HandleLibCXXABI) # Setup the ABI library flags
if (NOT LIBCXX_STANDALONE_BUILD)
# Remove flags that may have snuck in.
remove_flags(-DNDEBUG -UNDEBUG -D_DEBUG
-lc++abi)
endif()
remove_flags(-stdlib=libc++ -stdlib=libstdc++)
# FIXME: Remove all debug flags and flags that change which Windows
# default libraries are linked. Currently we only support linking the
# non-debug DLLs
remove_flags("/D_DEBUG" "/MTd" "/MDd" "/MT" "/Md")
# FIXME(EricWF): See the FIXME on LIBCXX_ENABLE_PEDANTIC.
# Remove the -pedantic flag and -Wno-pedantic and -pedantic-errors
# so they don't get transformed into -Wno and -errors respectively.
remove_flags(-Wno-pedantic -pedantic-errors -pedantic)
# Required flags ==============================================================
function(cxx_add_basic_build_flags target)
# Require C++17 for all targets. C++17 is needed to use aligned allocation
# in the dylib.
set_target_properties(${target} PROPERTIES
CXX_STANDARD 17
CXX_STANDARD_REQUIRED YES
CXX_EXTENSIONS NO)
# When building the dylib, don't warn for unavailable aligned allocation
# functions based on the deployment target -- they are always available
# because they are provided by the dylib itself.
target_add_compile_flags_if_supported(${target} PRIVATE -faligned-allocation)
# On all systems the system c++ standard library headers need to be excluded.
# MSVC only has -X, which disables all default includes; including the crt.
# Thus, we do nothing and hope we don't accidentally include any of the C++
# headers
target_add_compile_flags_if_supported(${target} PUBLIC -nostdinc++)
# Hide all inline function definitions which have not explicitly been marked
# visible. This prevents new definitions for inline functions from appearing in
# the dylib when get ODR used by another function.
target_add_compile_flags_if_supported(${target} PRIVATE -fvisibility-inlines-hidden)
# Our visibility annotations are not quite right for non-Clang compilers,
# so we end up not exporting all the symbols we should. In the future, we
# can improve the situation by providing an explicit list of exported
# symbols on all compilers.
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
target_add_compile_flags_if_supported(${target} PRIVATE -fvisibility=hidden)
endif()
if (LIBCXX_CONFIGURE_IDE)
# This simply allows IDE to process <experimental/coroutine>
target_add_compile_flags_if_supported(${target} PRIVATE -fcoroutines-ts)
endif()
# Let the library headers know they are currently being used to build the
# library.
target_compile_definitions(${target} PRIVATE -D_LIBCPP_BUILDING_LIBRARY)
if (NOT LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS)
target_compile_definitions(${target} PRIVATE -D_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS)
endif()
if (LIBCXX_HAS_COMMENT_LIB_PRAGMA)
if (LIBCXX_HAS_PTHREAD_LIB)
target_compile_definitions(${target} PRIVATE -D_LIBCPP_LINK_PTHREAD_LIB)
endif()
if (LIBCXX_HAS_RT_LIB)
target_compile_definitions(${target} PRIVATE -D_LIBCPP_LINK_RT_LIB)
endif()
endif()
endfunction()
# Warning flags ===============================================================
function(cxx_add_warning_flags target)
target_compile_definitions(${target} PUBLIC -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
target_add_compile_flags_if_supported(${target} PRIVATE -Wall -Wextra -W -Wwrite-strings
-Wno-unused-parameter -Wno-long-long
-Werror=return-type -Wextra-semi)
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
target_add_compile_flags_if_supported(${target} PRIVATE
-Wno-user-defined-literals
-Wno-covered-switch-default
-Wno-suggest-override
-Wno-ignored-attributes # FIXME: Caused by _LIBCPP_NODEBUG_TYPE not being supported on older clangs
)
if (LIBCXX_TARGETING_CLANG_CL)
target_add_compile_flags_if_supported(${target} PRIVATE
-Wno-c++98-compat
-Wno-c++98-compat-pedantic
-Wno-c++11-compat
-Wno-undef
-Wno-reserved-id-macro
-Wno-gnu-include-next
-Wno-gcc-compat # For ignoring "'diagnose_if' is a clang extension" warnings
-Wno-zero-as-null-pointer-constant # FIXME: Remove this and fix all occurrences.
-Wno-deprecated-dynamic-exception-spec # For auto_ptr
-Wno-sign-conversion
-Wno-old-style-cast
-Wno-deprecated # FIXME: Remove this and fix all occurrences.
-Wno-shift-sign-overflow # FIXME: Why do we need this with clang-cl but not clang?
-Wno-double-promotion # FIXME: remove me
)
endif()
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
target_add_compile_flags_if_supported(${target} PRIVATE
-Wno-literal-suffix
-Wno-c++14-compat
-Wno-noexcept-type
-Wno-suggest-override)
endif()
if (LIBCXX_ENABLE_WERROR)
target_add_compile_flags_if_supported(${target} PRIVATE -Werror)
target_add_compile_flags_if_supported(${target} PRIVATE -WX)
else()
# TODO(EricWF) Remove this. We shouldn't be suppressing errors when -Werror is
# added elsewhere.
target_add_compile_flags_if_supported(${target} PRIVATE -Wno-error)
endif()
if (LIBCXX_ENABLE_PEDANTIC)
target_add_compile_flags_if_supported(${target} PRIVATE -pedantic)
endif()
if (LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS)
target_compile_definitions(${target} PRIVATE -D_LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS)
endif()
endfunction()
# Exception flags =============================================================
function(cxx_add_exception_flags target)
if (LIBCXX_ENABLE_EXCEPTIONS)
# Catches C++ exceptions only and tells the compiler to assume that extern C
# functions never throw a C++ exception.
target_add_compile_flags_if_supported(${target} PUBLIC -EHsc)
else()
target_add_compile_flags_if_supported(${target} PUBLIC -EHs- -EHa-)
target_add_compile_flags_if_supported(${target} PUBLIC -fno-exceptions)
endif()
endfunction()
# RTTI flags ==================================================================
function(cxx_add_rtti_flags target)
if (NOT LIBCXX_ENABLE_RTTI)
target_add_compile_flags_if_supported(${target} PUBLIC -GR-)
target_add_compile_flags_if_supported(${target} PUBLIC -fno-rtti)
endif()
endfunction()
# Threading flags =============================================================
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXX_ENABLE_SHARED)
# Need to allow unresolved symbols if this is to work with shared library builds
if (APPLE)
add_link_flags("-undefined dynamic_lookup")
else()
# Relax this restriction from HandleLLVMOptions
string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
endif()
endif()
# Assertion flags =============================================================
define_if(LIBCXX_ENABLE_ASSERTIONS -UNDEBUG)
define_if_not(LIBCXX_ENABLE_ASSERTIONS -DNDEBUG)
define_if(LIBCXX_ENABLE_ASSERTIONS -D_LIBCPP_DEBUG=0)
define_if(LIBCXX_DEBUG_BUILD -D_DEBUG)
if (LIBCXX_ENABLE_ASSERTIONS AND NOT LIBCXX_DEBUG_BUILD)
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
define_if_not(LIBCXX_TARGETING_MSVC -D_DEBUG)
endif()
# Modules flags ===============================================================
# FIXME The libc++ sources are fundamentally non-modular. They need special
# versions of the headers in order to provide C++03 and legacy ABI definitions.
# NOTE: The public headers can be used with modules in all other contexts.
function(cxx_add_module_flags target)
if (LLVM_ENABLE_MODULES)
# Ignore that the rest of the modules flags are now unused.
target_add_compile_flags_if_supported(${target} PUBLIC -Wno-unused-command-line-argument)
target_compile_options(${target} PUBLIC -fno-modules)
endif()
endfunction()
# Sanitizer flags =============================================================
function(get_sanitizer_flags OUT_VAR USE_SANITIZER)
set(SANITIZER_FLAGS)
set(USE_SANITIZER "${USE_SANITIZER}")
# NOTE: LLVM_USE_SANITIZER checks for a UNIX like system instead of MSVC.
# But we don't have LLVM_ON_UNIX so checking for MSVC is the best we can do.
if (USE_SANITIZER AND NOT MSVC)
append_flags_if_supported(SANITIZER_FLAGS "-fno-omit-frame-pointer")
append_flags_if_supported(SANITIZER_FLAGS "-gline-tables-only")
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
append_flags_if_supported(SANITIZER_FLAGS "-gline-tables-only")
endif()
if (USE_SANITIZER STREQUAL "Address")
append_flags(SANITIZER_FLAGS "-fsanitize=address")
elseif (USE_SANITIZER MATCHES "Memory(WithOrigins)?")
append_flags(SANITIZER_FLAGS -fsanitize=memory)
if (USE_SANITIZER STREQUAL "MemoryWithOrigins")
append_flags(SANITIZER_FLAGS "-fsanitize-memory-track-origins")
endif()
elseif (USE_SANITIZER STREQUAL "Undefined")
append_flags(SANITIZER_FLAGS "-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all")
elseif (USE_SANITIZER STREQUAL "Address;Undefined" OR
USE_SANITIZER STREQUAL "Undefined;Address")
append_flags(SANITIZER_FLAGS "-fsanitize=address,undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all")
elseif (USE_SANITIZER STREQUAL "Thread")
append_flags(SANITIZER_FLAGS -fsanitize=thread)
elseif (USE_SANITIZER STREQUAL "DataFlow")
append_flags(SANITIZER_FLAGS -fsanitize=dataflow)
else()
message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${USE_SANITIZER}")
endif()
elseif(USE_SANITIZER AND MSVC)
message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
endif()
set(${OUT_VAR} "${SANITIZER_FLAGS}" PARENT_SCOPE)
endfunction()
# Configure for sanitizers. If LIBCXX_STANDALONE_BUILD then we have to do
# the flag translation ourselves. Othewise LLVM's CMakeList.txt will handle it.
if (LIBCXX_STANDALONE_BUILD)
set(LLVM_USE_SANITIZER "" CACHE STRING
"Define the sanitizer used to build the library and tests")
endif()
get_sanitizer_flags(SANITIZER_FLAGS "${LLVM_USE_SANITIZER}")
if (LIBCXX_STANDALONE_BUILD AND SANITIZER_FLAGS)
add_flags(${SANITIZER_FLAGS})
endif()
# Link system libraries =======================================================
function(cxx_link_system_libraries target)
target_add_link_flags_if_supported(${target} PRIVATE "-nodefaultlibs")
target_add_compile_flags_if_supported(${target} PRIVATE "/Zl")
target_add_link_flags_if_supported(${target} PRIVATE "/nodefaultlib")
if (LIBCXX_HAS_SYSTEM_LIB)
target_link_libraries(${target} PRIVATE System)
endif()
if (LIBCXX_HAS_PTHREAD_LIB)
target_link_libraries(${target} PRIVATE pthread)
endif()
if (LIBCXX_HAS_C_LIB)
target_link_libraries(${target} PRIVATE c)
endif()
if (LIBCXX_HAS_M_LIB)
target_link_libraries(${target} PRIVATE m)
endif()
if (LIBCXX_HAS_RT_LIB)
target_link_libraries(${target} PRIVATE rt)
endif()
if (LIBCXX_USE_COMPILER_RT)
find_compiler_rt_library(builtins LIBCXX_BUILTINS_LIBRARY)
if (LIBCXX_BUILTINS_LIBRARY)
target_link_libraries(${target} PRIVATE "${LIBCXX_BUILTINS_LIBRARY}")
endif()
elseif (LIBCXX_HAS_GCC_LIB)
target_link_libraries(${target} PRIVATE gcc)
elseif (LIBCXX_HAS_GCC_S_LIB)
target_link_libraries(${target} PRIVATE gcc_s)
endif()
if (LIBCXX_HAS_ATOMIC_LIB)
target_link_libraries(${target} PRIVATE atomic)
endif()
if (MINGW)
target_link_libraries(${target} PRIVATE "${MINGW_LIBRARIES}")
endif()
if (LIBCXX_TARGETING_MSVC)
if (LIBCXX_DEBUG_BUILD)
set(LIB_SUFFIX "d")
else()
set(LIB_SUFFIX "")
endif()
target_link_libraries(${target} PRIVATE ucrt${LIB_SUFFIX}) # Universal C runtime
target_link_libraries(${target} PRIVATE vcruntime${LIB_SUFFIX}) # C++ runtime
target_link_libraries(${target} PRIVATE msvcrt${LIB_SUFFIX}) # C runtime startup files
target_link_libraries(${target} PRIVATE msvcprt${LIB_SUFFIX}) # C++ standard library. Required for exception_ptr internals.
# Required for standards-complaint wide character formatting functions
# (e.g. `printfw`/`scanfw`)
target_link_libraries(${target} PRIVATE iso_stdio_wide_specifiers)
endif()
if (ANDROID AND ANDROID_PLATFORM_LEVEL LESS 21)
target_link_libraries(${target} PUBLIC android_support)
endif()
endfunction()
# Windows-related flags =======================================================
function(cxx_add_windows_flags target)
if(WIN32 AND NOT MINGW)
target_compile_definitions(${target} PRIVATE
# Ignore the -MSC_VER mismatch, as we may build
# with a different compatibility version.
_ALLOW_MSC_VER_MISMATCH
# Don't check the msvcprt iterator debug levels
# as we will define the iterator types; libc++
# uses a different macro to identify the debug
# level.
_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH
# We are building the c++ runtime, don't pull in
# msvcprt.
_CRTBLD
# Don't warn on the use of "deprecated"
# "insecure" functions which are standards
# specified.
_CRT_SECURE_NO_WARNINGS
# Use the ISO conforming behaviour for conversion
# in printf, scanf.
_CRT_STDIO_ISO_WIDE_SPECIFIERS)
endif()
endfunction()
# Configuration file flags =====================================================
if (NOT LIBCXX_ABI_VERSION EQUAL 1)
config_define(${LIBCXX_ABI_VERSION} _LIBCPP_ABI_VERSION)
endif()
if (NOT LIBCXX_ABI_NAMESPACE STREQUAL "")
if (NOT LIBCXX_ABI_NAMESPACE MATCHES "__.*")
message(FATAL_ERROR "LIBCXX_ABI_NAMESPACE must be a reserved identifier.")
endif()
if (LIBCXX_ABI_NAMESPACE MATCHES "__[0-9]+$")
message(FATAL_ERROR "LIBCXX_ABI_NAMESPACE '${LIBCXX_ABI_NAMESPACE}' is reserved for use by libc++.")
endif()
config_define(${LIBCXX_ABI_NAMESPACE} _LIBCPP_ABI_NAMESPACE)
endif()
config_define_if(LIBCXX_ABI_UNSTABLE _LIBCPP_ABI_UNSTABLE)
config_define_if(LIBCXX_ABI_FORCE_ITANIUM _LIBCPP_ABI_FORCE_ITANIUM)
config_define_if(LIBCXX_ABI_FORCE_MICROSOFT _LIBCPP_ABI_FORCE_MICROSOFT)
config_define_if(LIBCXX_HIDE_FROM_ABI_PER_TU_BY_DEFAULT _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT)
config_define_if_not(LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE)
config_define_if_not(LIBCXX_ENABLE_STDIN _LIBCPP_HAS_NO_STDIN)
config_define_if_not(LIBCXX_ENABLE_STDOUT _LIBCPP_HAS_NO_STDOUT)
config_define_if_not(LIBCXX_ENABLE_THREADS _LIBCPP_HAS_NO_THREADS)
config_define_if_not(LIBCXX_ENABLE_MONOTONIC_CLOCK _LIBCPP_HAS_NO_MONOTONIC_CLOCK)
config_define_if_not(LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS)
if (NOT LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION STREQUAL "")
config_define("${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}" _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION)
endif()
config_define_if(LIBCXX_HAS_PTHREAD_API _LIBCPP_HAS_THREAD_API_PTHREAD)
config_define_if(LIBCXX_HAS_EXTERNAL_THREAD_API _LIBCPP_HAS_THREAD_API_EXTERNAL)
config_define_if(LIBCXX_HAS_WIN32_THREAD_API _LIBCPP_HAS_THREAD_API_WIN32)
config_define_if(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY _LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL)
config_define_if(LIBCXX_HAS_MUSL_LIBC _LIBCPP_HAS_MUSL_LIBC)
config_define_if(LIBCXX_NO_VCRUNTIME _LIBCPP_NO_VCRUNTIME)
config_define_if(LIBCXX_ENABLE_PARALLEL_ALGORITHMS _LIBCPP_HAS_PARALLEL_ALGORITHMS)
if (LIBCXX_ABI_DEFINES)
set(abi_defines)
foreach (abi_define ${LIBCXX_ABI_DEFINES})
if (NOT abi_define MATCHES "^_LIBCPP_ABI_")
message(SEND_ERROR "Invalid ABI macro ${abi_define} in LIBCXX_ABI_DEFINES")
endif()
list(APPEND abi_defines "#define ${abi_define}")
endforeach()
string(REPLACE ";" "\n" abi_defines "${abi_defines}")
config_define(${abi_defines} _LIBCPP_ABI_DEFINES)
endif()
# By default libc++ on Windows expects to use a shared library, which requires
# the headers to use DLL import/export semantics. However when building a
# static library only we modify the headers to disable DLL import/export.
if (DEFINED WIN32 AND LIBCXX_ENABLE_STATIC AND NOT LIBCXX_ENABLE_SHARED)
message(STATUS "Generating custom __config for non-DLL Windows build")
config_define(ON _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
endif()
# Setup all common build flags =================================================
function(cxx_add_common_build_flags target)
cxx_add_basic_build_flags(${target})
cxx_add_warning_flags(${target})
cxx_add_windows_flags(${target})
cxx_add_exception_flags(${target})
cxx_add_rtti_flags(${target})
cxx_add_module_flags(${target})
cxx_link_system_libraries(${target})
endfunction()
#===============================================================================
# Setup Source Code And Tests
#===============================================================================
add_subdirectory(include)
add_subdirectory(src)
set(LIBCXX_TEST_DEPS "")
if (LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY)
list(APPEND LIBCXX_TEST_DEPS cxx_experimental)
endif()
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
list(APPEND LIBCXX_TEST_DEPS cxx_external_threads)
endif()
if (LIBCXX_INCLUDE_BENCHMARKS)
add_subdirectory(benchmarks)
endif()
if (LIBCXX_INCLUDE_TESTS)
add_subdirectory(test)
add_subdirectory(lib/abi)
if (LIBCXX_STANDALONE_BUILD)
include(AddLLVM) # for get_llvm_lit_path
# Make sure the llvm-lit script is generated into the bin directory, and
# do it after adding all tests, since the generated script will only work
# correctly discovered tests against test locations from the source tree
# that have already been discovered.
add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/llvm-lit
${CMAKE_CURRENT_BINARY_DIR}/llvm-lit)
endif()
endif()
if (LIBCXX_INCLUDE_DOCS)
add_subdirectory(docs)
endif()
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