| # See https://libcxx.llvm.org/docs/BuildingLibcxx.html for instructions on how |
| # to build libcxx with CMake. |
| |
| if (NOT IS_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/../libcxxabi") |
| message(FATAL_ERROR "libc++ now requires being built in a monorepo layout with libcxxabi available") |
| endif() |
| |
| #=============================================================================== |
| # Setup Project |
| #=============================================================================== |
| cmake_minimum_required(VERSION 3.13.4) |
| |
| # Add path for custom modules |
| set(CMAKE_MODULE_PATH |
| "${CMAKE_CURRENT_SOURCE_DIR}/cmake" |
| "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" |
| ${CMAKE_MODULE_PATH} |
| ) |
| |
| set(CMAKE_FOLDER "libc++") |
| |
| 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 (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBCXX_STANDALONE_BUILD) |
| project(libcxx CXX C) |
| |
| set(PACKAGE_NAME libcxx) |
| set(PACKAGE_VERSION 14.0.0git) |
| set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") |
| set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org") |
| |
| # In a standalone build, we don't have llvm to automatically generate the |
| # llvm-lit script for us. So we need to provide an explicit directory that |
| # the configurator should write the script into. |
| set(LIBCXX_STANDALONE_BUILD 1) |
| set(LLVM_LIT_OUTPUT_DIR "${LIBCXX_BINARY_DIR}/bin") |
| |
| # Find the LLVM sources and simulate LLVM CMake options. |
| include(HandleOutOfTreeLLVM) |
| endif() |
| |
| if (LIBCXX_STANDALONE_BUILD) |
| 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 ${Python2_EXECUTABLE}) |
| endif() |
| endif() |
| |
| # Require out of source build. |
| include(MacroEnsureOutOfSourceBuild) |
| MACRO_ENSURE_OUT_OF_SOURCE_BUILD( |
| "${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 AND NOT MINGW) |
| # Filesystem is buildable for windows, but it requires __int128 helper |
| # functions, that currently are provided by libgcc or compiler_rt builtins. |
| # These are available in MinGW environments, but not currently in MSVC |
| # environments. |
| 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_ENABLE_DEBUG_MODE_SUPPORT |
| "Whether to include support for libc++'s debugging mode in the library. |
| By default, this is turned on. If you turn it off and try to enable the |
| debug mode when compiling a program against libc++, it will fail to link |
| since the required support isn't provided in the library." ON) |
| option(LIBCXX_ENABLE_RANDOM_DEVICE |
| "Whether to include support for std::random_device in the library. Disabling |
| this can be useful when building the library for platforms that don't have |
| a source of randomness, such as some embedded platforms. When this is not |
| supported, most of <random> will still be available, but std::random_device |
| will not." ON) |
| option(LIBCXX_ENABLE_LOCALIZATION |
| "Whether to include support for localization in the library. Disabling |
| localization can be useful when porting to platforms that don't support |
| the C locale API (e.g. embedded). When localization is not supported, |
| several parts of the library will be disabled: <iostream>, <regex>, <locale> |
| will be completely unusable, and other parts may be only partly available." ON) |
| option(LIBCXX_ENABLE_UNICODE |
| "Whether to include support for Unicode in the library. Disabling Unicode can |
| be useful when porting to platforms that don't support UTF-8 encoding (e.g. |
| embedded)." ON) |
| option(LIBCXX_ENABLE_WIDE_CHARACTERS |
| "Whether to include support for wide characters in the library. Disabling |
| wide character support can be useful when porting to platforms that don't |
| support the C functionality for wide characters. When wide characters are |
| not supported, several parts of the library will be disabled, notably the |
| wide character specializations of std::basic_string." ON) |
| option(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS |
| "Whether to turn on vendor availability annotations on declarations that depend |
| on definitions in a shared library. By default, we assume that we're not building |
| libc++ for any specific vendor, and we disable those annotations. Vendors wishing |
| to provide compile-time errors when using features unavailable on some version of |
| the shared library they shipped should turn this on and see `include/__availability` |
| for more details." OFF) |
| option(LIBCXX_ENABLE_INCOMPLETE_FEATURES |
| "Whether to enable support for incomplete library features. Incomplete features |
| are new library features under development. These features don't guarantee |
| ABI stability nor the quality of completed library features. Vendors |
| shipping the library may want to disable this option." ON) |
| set(LIBCXX_TEST_CONFIG "legacy.cfg.in" CACHE STRING |
| "The path to the Lit testing configuration to use when running the tests. |
| If a relative path is provided, it is assumed to be relative to '<monorepo>/libcxx/test/configs'.") |
| if (NOT IS_ABSOLUTE "${LIBCXX_TEST_CONFIG}") |
| set(LIBCXX_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/configs/${LIBCXX_TEST_CONFIG}") |
| endif() |
| 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) |
| 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 "default" CACHE STRING |
| "Override the implementation to use for comparing typeinfos. By default, this |
| is detected automatically by the library, but this option allows overriding |
| which implementation is used unconditionally. |
| |
| See the documentation in <libcxx/include/typeinfo> for details on what each |
| value means.") |
| set(TYPEINFO_COMPARISON_VALUES "default;1;2;3") |
| if (NOT ("${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}" IN_LIST TYPEINFO_COMPARISON_VALUES)) |
| message(FATAL_ERROR "Value '${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. These are normally |
| defined in libc++abi, but this option can be used to define them in libc++ |
| instead. If you define them in libc++, make sure they are NOT defined in |
| libc++abi. Doing otherwise is an ODR violation." OFF) |
| # 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++." ${LLVM_BUILD_32_BITS}) |
| set(LIBCXX_TARGET_TRIPLE "${LLVM_DEFAULT_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_THREADS "Build libc++ with support for threads." 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") |
| |
| 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_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 |
| #=============================================================================== |
| |
| # TODO: Projects that depend on libc++ should use LIBCXX_GENERATED_INCLUDE_DIR |
| # instead of hard-coding include/c++/v1. |
| if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE) |
| set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}) |
| set(LIBCXX_GENERATED_INCLUDE_DIR "${LLVM_BINARY_DIR}/include/c++/v1") |
| set(LIBCXX_GENERATED_INCLUDE_TARGET_DIR "${LLVM_BINARY_DIR}/include/${LLVM_DEFAULT_TARGET_TRIPLE}/c++/v1") |
| set(LIBCXX_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE PATH |
| "Path where built libc++ libraries should be installed.") |
| set(LIBCXX_INSTALL_RUNTIME_DIR bin CACHE PATH |
| "Path where built libc++ runtime libraries should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_DIR "include/c++/v1" CACHE PATH |
| "Path where target-agnostic libc++ headers should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_TARGET_DIR "include/${LLVM_DEFAULT_TARGET_TRIPLE}/c++/v1" CACHE PATH |
| "Path where target-specific libc++ headers should be installed.") |
| 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 ${LLVM_LIBRARY_OUTPUT_INTDIR}) |
| set(LIBCXX_GENERATED_INCLUDE_DIR "${LLVM_BINARY_DIR}/include/c++/v1") |
| set(LIBCXX_GENERATED_INCLUDE_TARGET_DIR "${LIBCXX_GENERATED_INCLUDE_DIR}") |
| set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX} CACHE PATH |
| "Path where built libc++ libraries should be installed.") |
| set(LIBCXX_INSTALL_RUNTIME_DIR bin CACHE PATH |
| "Path where built libc++ runtime libraries should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_DIR "include/c++/v1" CACHE PATH |
| "Path where target-agnostic libc++ headers should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_TARGET_DIR "${LIBCXX_INSTALL_INCLUDE_DIR}" CACHE PATH |
| "Path where target-specific libc++ headers should be installed.") |
| else() |
| set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX}) |
| set(LIBCXX_GENERATED_INCLUDE_DIR "${CMAKE_BINARY_DIR}/include/c++/v1") |
| set(LIBCXX_GENERATED_INCLUDE_TARGET_DIR "${LIBCXX_GENERATED_INCLUDE_DIR}") |
| set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX} CACHE PATH |
| "Path where built libc++ libraries should be installed.") |
| set(LIBCXX_INSTALL_RUNTIME_DIR bin CACHE PATH |
| "Path where built libc++ runtime libraries should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_DIR "include/c++/v1" CACHE PATH |
| "Path where target-agnostic libc++ headers should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_TARGET_DIR "${LIBCXX_INSTALL_INCLUDE_DIR}" CACHE PATH |
| "Path where target-specific libc++ headers should be installed.") |
| endif() |
| |
| file(MAKE_DIRECTORY "${LIBCXX_BINARY_INCLUDE_DIR}") |
| |
| set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR}) |
| set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR}) |
| set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR}) |
| |
| # Declare libc++ configuration variables. |
| # They are intended for use as follows: |
| # LIBCXX_CXX_FLAGS: General flags for both the compiler and linker. |
| # LIBCXX_COMPILE_FLAGS: Compile only flags. |
| # LIBCXX_LINK_FLAGS: Linker only flags. |
| # LIBCXX_LIBRARIES: libraries libc++ is linked to. |
| set(LIBCXX_COMPILE_FLAGS "") |
| set(LIBCXX_LINK_FLAGS "") |
| set(LIBCXX_LIBRARIES "") |
| |
| # Include macros for adding and removing libc++ flags. |
| include(HandleLibcxxFlags) |
| |
| # Target flags ================================================================ |
| # These flags get added to CMAKE_CXX_FLAGS and CMAKE_C_FLAGS so that |
| # 'config-ix' use them during feature checks. It also adds them to both |
| # 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS' |
| add_target_flags_if(LIBCXX_BUILD_32_BITS "-m32") |
| |
| if(LIBCXX_TARGET_TRIPLE) |
| add_target_flags_if_supported("--target=${LIBCXX_TARGET_TRIPLE}") |
| elseif(CMAKE_CXX_COMPILER_TARGET) |
| set(LIBCXX_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}") |
| endif() |
| if(LIBCXX_SYSROOT) |
| add_target_flags_if_supported("--sysroot=${LIBCXX_SYSROOT}") |
| elseif(CMAKE_SYSROOT) |
| set(LIBCXX_SYSROOT "${CMAKE_SYSROOT}") |
| endif() |
| if(LIBCXX_GCC_TOOLCHAIN) |
| add_target_flags_if_supported("--gcc-toolchain=${LIBCXX_GCC_TOOLCHAIN}") |
| elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN) |
| set(LIBCXX_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}") |
| endif() |
| |
| # Configure compiler. |
| include(config-ix) |
| |
| # Configure coverage options. |
| if (LIBCXX_GENERATE_COVERAGE) |
| include(CodeCoverage) |
| set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE) |
| endif() |
| |
| string(TOUPPER "${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=libc++ --stdlib=libstdc++ -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++20 for all targets. C++17 is needed to use aligned allocation |
| # in the dylib. C++20 is needed to use char8_t. |
| set_target_properties(${target} PROPERTIES |
| CXX_STANDARD 20 |
| CXX_STANDARD_REQUIRED YES |
| CXX_EXTENSIONS NO) |
| |
| # When building the dylib, don't warn for unavailable aligned allocation |
| # functions based on the deployment target -- they are always available |
| # because they are provided by the dylib itself with the excepton of z/OS. |
| if (ZOS) |
| target_add_compile_flags_if_supported(${target} PRIVATE -fno-aligned-allocation) |
| else() |
| target_add_compile_flags_if_supported(${target} PRIVATE -faligned-allocation) |
| endif() |
| |
| # On all systems the system c++ standard library headers need to be excluded. |
| # MSVC only has -X, which disables all default includes; including the crt. |
| # Thus, we do nothing and hope we don't accidentally include any of the C++ |
| # headers |
| target_add_compile_flags_if_supported(${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) |
| if (MSVC) |
| # -W4 is the cl.exe/clang-cl equivalent of -Wall. (In cl.exe and clang-cl, |
| # -Wall is equivalent to -Weverything in GCC style compiler drivers.) |
| target_add_compile_flags_if_supported(${target} PRIVATE -W4) |
| else() |
| target_add_compile_flags_if_supported(${target} PRIVATE -Wall) |
| endif() |
| target_add_compile_flags_if_supported(${target} PRIVATE -Wextra -W -Wwrite-strings |
| -Wno-unused-parameter -Wno-long-long |
| -Werror=return-type -Wextra-semi -Wundef) |
| if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") |
| target_add_compile_flags_if_supported(${target} PRIVATE |
| -Wno-user-defined-literals |
| -Wno-covered-switch-default |
| -Wno-suggest-override |
| ) |
| if (LIBCXX_TARGETING_CLANG_CL) |
| target_add_compile_flags_if_supported(${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(${SANITIZER_FLAGS}) |
| endif() |
| |
| # Link system libraries ======================================================= |
| function(cxx_link_system_libraries target) |
| |
| # In order to remove just libc++ from the link step |
| # we need to use -nostdlib++ whenever it is supported. |
| # Unfortunately this cannot be used universally because for example g++ supports |
| # only -nodefaultlibs in which case all libraries will be removed and |
| # all libraries but c++ have to be added in manually. |
| if (LIBCXX_SUPPORTS_NOSTDLIBXX_FLAG) |
| target_add_link_flags_if_supported(${target} PRIVATE "-nostdlib++") |
| else() |
| target_add_link_flags_if_supported(${target} PRIVATE "-nodefaultlibs") |
| target_add_compile_flags_if_supported(${target} PRIVATE "/Zl") |
| target_add_link_flags_if_supported(${target} PRIVATE "/nodefaultlib") |
| endif() |
| |
| if (LIBCXX_HAS_SYSTEM_LIB) |
| target_link_libraries(${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_THREADS _LIBCPP_HAS_NO_THREADS) |
| config_define_if_not(LIBCXX_ENABLE_MONOTONIC_CLOCK _LIBCPP_HAS_NO_MONOTONIC_CLOCK) |
| if (NOT LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION STREQUAL "default") |
| 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) |
| config_define_if_not(LIBCXX_ENABLE_FILESYSTEM _LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) |
| config_define_if_not(LIBCXX_ENABLE_RANDOM_DEVICE _LIBCPP_HAS_NO_RANDOM_DEVICE) |
| config_define_if_not(LIBCXX_ENABLE_LOCALIZATION _LIBCPP_HAS_NO_LOCALIZATION) |
| config_define_if_not(LIBCXX_ENABLE_UNICODE _LIBCPP_HAS_NO_UNICODE) |
| config_define_if_not(LIBCXX_ENABLE_WIDE_CHARACTERS _LIBCPP_HAS_NO_WIDE_CHARACTERS) |
| config_define_if_not(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS) |
| # Incomplete features get their own specific disabling flags. This makes it |
| # easier to grep for target specific flags once the feature is complete. |
| config_define_if_not(LIBCXX_ENABLE_INCOMPLETE_FEATURES _LIBCPP_HAS_NO_INCOMPLETE_FORMAT) |
| config_define_if_not(LIBCXX_ENABLE_INCOMPLETE_FEATURES _LIBCPP_HAS_NO_INCOMPLETE_RANGES) |
| |
| 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(${abi_defines} _LIBCPP_ABI_DEFINES) |
| endif() |
| |
| # By default libc++ on Windows expects to use a shared library, which requires |
| # the headers to use DLL import/export semantics. However when building a |
| # static library only we modify the headers to disable DLL import/export. |
| if (DEFINED WIN32 AND LIBCXX_ENABLE_STATIC AND NOT LIBCXX_ENABLE_SHARED) |
| message(STATUS "Generating custom __config for non-DLL Windows build") |
| config_define(ON _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| endif() |
| |
| if (WIN32 AND LIBCXX_ENABLE_STATIC_ABI_LIBRARY) |
| # If linking libcxxabi statically into libcxx, skip the dllimport attributes |
| # on symbols we refer to from libcxxabi. |
| add_definitions(-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS) |
| endif() |
| |
| # Setup all common build flags ================================================= |
| function(cxx_add_common_build_flags target) |
| cxx_add_basic_build_flags(${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) |
| add_subdirectory(utils) |
| |
| 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() |