| #=============================================================================== |
| # Setup Project |
| #=============================================================================== |
| cmake_minimum_required(VERSION 3.20.0) |
| set(LLVM_SUBPROJECT_TITLE "libc++") |
| |
| set(LLVM_COMMON_CMAKE_UTILS "${CMAKE_CURRENT_SOURCE_DIR}/../cmake") |
| |
| # Add path for custom modules |
| list(INSERT CMAKE_MODULE_PATH 0 |
| "${CMAKE_CURRENT_SOURCE_DIR}/cmake" |
| "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" |
| "${CMAKE_CURRENT_SOURCE_DIR}/../runtimes/cmake/Modules" |
| "${LLVM_COMMON_CMAKE_UTILS}" |
| "${LLVM_COMMON_CMAKE_UTILS}/Modules" |
| ) |
| |
| 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") |
| |
| include(GNUInstallDirs) |
| include(WarningFlags) |
| |
| # 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) |
| message(STATUS "Configuring for MSVC") |
| endif() |
| |
| #=============================================================================== |
| # Setup CMake Options |
| #=============================================================================== |
| include(CMakeDependentOption) |
| include(HandleCompilerRT) |
| |
| # Basic options --------------------------------------------------------------- |
| option(LIBCXX_ENABLE_ASSERTIONS |
| "Enable assertions inside the compiled library, and at the same time make it the |
| default when compiling user code. Note that assertions can be enabled or disabled |
| by users in their own code regardless of this option." 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_FILESYSTEM |
| "Whether to include support for parts of the library that rely on a filesystem being |
| available on the platform. This includes things like most parts of <filesystem> and |
| others like <fstream>" ON) |
| option(LIBCXX_INCLUDE_TESTS "Build the libc++ tests." ${LLVM_INCLUDE_TESTS}) |
| set(LIBCXX_SUPPORTED_HARDENING_MODES none fast extensive debug) |
| set(LIBCXX_HARDENING_MODE "none" CACHE STRING |
| "Specify the default hardening mode to use. This mode will be used inside the |
| compiled library and will be the default when compiling user code. Note that |
| users can override this setting in their own code. This does not affect the |
| ABI. Supported values are ${LIBCXX_SUPPORTED_HARDENING_MODES}.") |
| if (NOT "${LIBCXX_HARDENING_MODE}" IN_LIST LIBCXX_SUPPORTED_HARDENING_MODES) |
| message(FATAL_ERROR |
| "Unsupported hardening mode: '${LIBCXX_HARDENING_MODE}'. Supported values are ${LIBCXX_SUPPORTED_HARDENING_MODES}.") |
| endif() |
| set(LIBCXX_ASSERTION_HANDLER_FILE |
| "vendor/llvm/default_assertion_handler.in" |
| CACHE STRING |
| "Specify the path to a header that contains a custom implementation of the |
| assertion handler that gets invoked when a hardening assertion fails. If |
| provided, this header will be included by the library, replacing the |
| default assertion handler. If this is specified as a relative path, it |
| is assumed to be relative to '<monorepo>/libcxx'.") |
| if (NOT IS_ABSOLUTE "${LIBCXX_ASSERTION_HANDLER_FILE}") |
| set(LIBCXX_ASSERTION_HANDLER_FILE "${CMAKE_CURRENT_SOURCE_DIR}/${LIBCXX_ASSERTION_HANDLER_FILE}") |
| endif() |
| 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_HAS_TERMINAL_AVAILABLE |
| "Build libc++ with support for checking whether a stream is a terminal." 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) |
| |
| # To use time zone support in libc++ the platform needs to have the IANA |
| # database installed. Libc++ will fail to build if this is enabled on a |
| # platform that does not provide the IANA database. The default is set to the |
| # current implementation state on the different platforms. |
| # |
| # TODO TZDB make the default always ON when most platforms ship with the IANA |
| # database. |
| if(${CMAKE_SYSTEM_NAME} MATCHES "Linux") |
| set(ENABLE_TIME_ZONE_DATABASE_DEFAULT ON) |
| else() |
| set(ENABLE_TIME_ZONE_DATABASE_DEFAULT OFF) |
| endif() |
| option(LIBCXX_ENABLE_TIME_ZONE_DATABASE |
| "Whether to include support for time zones in the library. Disabling |
| time zone support can be useful when porting to platforms that don't |
| ship the IANA time zone database. When time zones are not supported, |
| time zone support in <chrono> will be disabled." ${ENABLE_TIME_ZONE_DATABASE_DEFAULT}) |
| option(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS |
| "Whether to turn on vendor availability annotations on declarations that depend |
| on definitions in a shared library. By default, we assume that we're not building |
| libc++ for any specific vendor, and we disable those annotations. Vendors wishing |
| to provide compile-time errors when using features unavailable on some version of |
| the shared library they shipped should turn this on and see `include/__configuration/availability.h` |
| for more details." OFF) |
| |
| if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU") |
| set(LIBCXX_DEFAULT_TEST_CONFIG "llvm-libc++-shared-gcc.cfg.in") |
| elseif(MINGW) |
| if (LIBCXX_ENABLE_SHARED) |
| set(LIBCXX_DEFAULT_TEST_CONFIG "llvm-libc++-shared-mingw.cfg.in") |
| else() |
| set(LIBCXX_DEFAULT_TEST_CONFIG "llvm-libc++-static-mingw.cfg.in") |
| endif() |
| elseif(WIN32) # clang-cl |
| if (LIBCXX_ENABLE_SHARED) |
| set(LIBCXX_DEFAULT_TEST_CONFIG "llvm-libc++-shared-clangcl.cfg.in") |
| else() |
| set(LIBCXX_DEFAULT_TEST_CONFIG "llvm-libc++-static-clangcl.cfg.in") |
| endif() |
| else() |
| if (LIBCXX_ENABLE_SHARED) |
| set(LIBCXX_DEFAULT_TEST_CONFIG "llvm-libc++-shared.cfg.in") |
| else() |
| set(LIBCXX_DEFAULT_TEST_CONFIG "llvm-libc++-static.cfg.in") |
| endif() |
| endif() |
| set(LIBCXX_TEST_CONFIG "${LIBCXX_DEFAULT_TEST_CONFIG}" 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() |
| message(STATUS "Using libc++ testing configuration: ${LIBCXX_TEST_CONFIG}") |
| set(LIBCXX_TEST_PARAMS "" CACHE STRING |
| "A list of parameters to run the Lit test suite with.") |
| |
| # Benchmark options ----------------------------------------------------------- |
| option(LIBCXX_INCLUDE_BENCHMARKS "Build the libc++ benchmarks and their dependencies" ON) |
| |
| set(LIBCXX_BENCHMARK_TEST_ARGS_DEFAULT --benchmark_min_time=0.01) |
| set(LIBCXX_BENCHMARK_TEST_ARGS "${LIBCXX_BENCHMARK_TEST_ARGS_DEFAULT}" CACHE STRING |
| "Arguments to pass when running the benchmarks using check-cxx-benchmarks") |
| |
| 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) |
| option(LIBCXX_INSTALL_MODULES |
| "Install the libc++ C++20 module source files (experimental)." 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_ABI_UNSTABLE "Use the unstable ABI of libc++. This is equivalent to specifying LIBCXX_ABI_VERSION=n, where n is the not-yet-stable version." OFF) |
| if (LIBCXX_ABI_UNSTABLE) |
| set(abi_version "2") |
| else() |
| set(abi_version "1") |
| endif() |
| set(LIBCXX_ABI_VERSION "${abi_version}" CACHE STRING |
| "ABI version of libc++. Can be either 1 or 2, where 2 is currently the unstable ABI. |
| Defaults to 1 unless LIBCXX_ABI_UNSTABLE is specified, in which case this is 2.") |
| set(LIBCXX_LIBRARY_VERSION "${LIBCXX_ABI_VERSION}.0" CACHE STRING |
| "Version of libc++. This will be reflected in the name of the shared library produced. |
| For example, -DLIBCXX_LIBRARY_VERSION=x.y will result in the library being named |
| libc++.x.y.dylib, along with the usual symlinks pointing to that. On Apple platforms, |
| this also controls the linker's 'current_version' property.") |
| set(LIBCXX_ABI_NAMESPACE "__${LIBCXX_ABI_VERSION}" CACHE STRING "The inline ABI namespace used by libc++. It defaults to __n where `n` is the current ABI version.") |
| if (NOT LIBCXX_ABI_NAMESPACE MATCHES "__.*") |
| message(FATAL_ERROR "LIBCXX_ABI_NAMESPACE must be a reserved identifier, got '${LIBCXX_ABI_NAMESPACE}'.") |
| endif() |
| 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() |
| |
| set(LIBCXX_ABI_DEFINES "" CACHE STRING "A semicolon separated list of ABI macros to define in the site config header.") |
| set(LIBCXX_EXTRA_SITE_DEFINES "" CACHE STRING "Extra defines to add into __config_site") |
| option(LIBCXX_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF) |
| |
| # C Library options ----------------------------------------------------------- |
| |
| set(LIBCXX_SUPPORTED_C_LIBRARIES system llvm-libc) |
| set(LIBCXX_LIBC "system" CACHE STRING "Specify C library to use. Supported values are ${LIBCXX_SUPPORTED_C_LIBRARIES}.") |
| if (NOT "${LIBCXX_LIBC}" IN_LIST LIBCXX_SUPPORTED_C_LIBRARIES) |
| message(FATAL_ERROR "Unsupported C library: '${LIBCXX_CXX_ABI}'. Supported values are ${LIBCXX_SUPPORTED_C_LIBRARIES}.") |
| endif() |
| |
| # ABI Library options --------------------------------------------------------- |
| if (MSVC) |
| set(LIBCXX_DEFAULT_ABI_LIBRARY "vcruntime") |
| else() |
| set(LIBCXX_DEFAULT_ABI_LIBRARY "libcxxabi") |
| endif() |
| |
| set(LIBCXX_SUPPORTED_ABI_LIBRARIES none libcxxabi system-libcxxabi libcxxrt libstdc++ libsupc++ vcruntime) |
| set(LIBCXX_CXX_ABI "${LIBCXX_DEFAULT_ABI_LIBRARY}" CACHE STRING "Specify C++ ABI library to use. Supported values are ${LIBCXX_SUPPORTED_ABI_LIBRARIES}.") |
| if (NOT "${LIBCXX_CXX_ABI}" IN_LIST LIBCXX_SUPPORTED_ABI_LIBRARIES) |
| message(FATAL_ERROR "Unsupported C++ ABI library: '${LIBCXX_CXX_ABI}'. Supported values are ${LIBCXX_SUPPORTED_ABI_LIBRARIES}.") |
| 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) |
| |
| option(LIBCXX_STATICALLY_LINK_ABI_IN_STATIC_LIBRARY |
| "Statically link the ABI library to static library" |
| ${LIBCXX_ENABLE_STATIC_ABI_LIBRARY}) |
| |
| option(LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY |
| "Statically link the ABI library to shared library" |
| ${LIBCXX_ENABLE_STATIC_ABI_LIBRARY}) |
| |
| # 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, and on the Fuchsia platform unless we |
| # statically link libc++abi inside libc++.so, we don't build libc++.so at all |
| # or we don't have any ABI library. |
| if (LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY |
| OR NOT LIBCXX_ENABLE_SHARED |
| OR LIBCXX_CXX_ABI STREQUAL "none") |
| set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF) |
| elseif((UNIX OR FUCHSIA) AND NOT APPLE) |
| set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON) |
| else() |
| set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF) |
| 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." ON) |
| |
| # Target options -------------------------------------------------------------- |
| option(LIBCXX_BUILD_32_BITS "Build 32 bit multilib libc++. This option is not supported anymore when building the runtimes. Please specify a full triple instead." ${LLVM_BUILD_32_BITS}) |
| if (LIBCXX_BUILD_32_BITS) |
| message(FATAL_ERROR "LIBCXX_BUILD_32_BITS is not supported anymore when building the runtimes, please specify a full triple instead.") |
| endif() |
| |
| # Feature options ------------------------------------------------------------- |
| option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON) |
| option(LIBCXX_ENABLE_RTTI |
| "Use runtime type information. |
| This option may only be set to OFF when LIBCXX_ENABLE_EXCEPTIONS=OFF." 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) |
| |
| if (LIBCXX_ENABLE_THREADS) |
| set(LIBCXX_PSTL_BACKEND "std_thread" CACHE STRING "Which PSTL backend to use") |
| else() |
| set(LIBCXX_PSTL_BACKEND "serial" CACHE STRING "Which PSTL backend to use") |
| endif() |
| |
| # 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) |
| |
| set(LIBCXX_HERMETIC_STATIC_LIBRARY_DEFAULT OFF) |
| if (WIN32) |
| set(LIBCXX_HERMETIC_STATIC_LIBRARY_DEFAULT ON) |
| endif() |
| option(LIBCXX_HERMETIC_STATIC_LIBRARY |
| "Do not export any symbols from the static library." ${LIBCXX_HERMETIC_STATIC_LIBRARY_DEFAULT}) |
| |
| #=============================================================================== |
| # 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_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_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() |
| |
| if (NOT LIBCXX_ENABLE_RTTI AND LIBCXX_ENABLE_EXCEPTIONS) |
| message(FATAL_ERROR "Libc++ cannot be built with exceptions enabled but RTTI" |
| " disabled, since that configuration is broken. See" |
| " https://github.com/llvm/llvm-project/issues/66117" |
| " for details.") |
| 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_STATICALLY_LINK_ABI_IN_SHARED_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 () |
| |
| if (LIBCXX_ENABLE_SHARED AND CMAKE_MSVC_RUNTIME_LIBRARY AND |
| (NOT CMAKE_MSVC_RUNTIME_LIBRARY MATCHES "DLL$")) |
| message(WARNING "A static CRT linked into a shared libc++ doesn't work correctly.") |
| endif() |
| |
| #=============================================================================== |
| # Configure System |
| #=============================================================================== |
| |
| # TODO: Projects that depend on libc++ should use LIBCXX_GENERATED_INCLUDE_DIR |
| # instead of hard-coding include/c++/v1. |
| |
| set(LIBCXX_INSTALL_INCLUDE_DIR "${CMAKE_INSTALL_INCLUDEDIR}/c++/v1" CACHE STRING |
| "Path where target-agnostic libc++ headers should be installed.") |
| set(LIBCXX_INSTALL_RUNTIME_DIR "${CMAKE_INSTALL_BINDIR}" CACHE STRING |
| "Path where built libc++ runtime libraries should be installed.") |
| set(LIBCXX_INSTALL_MODULES_DIR "share/libc++/v1" CACHE STRING |
| "Path where target-agnostic libc++ module source files should be installed.") |
| |
| set(LIBCXX_SHARED_OUTPUT_NAME "c++" CACHE STRING "Output name for the shared libc++ runtime library.") |
| set(LIBCXX_STATIC_OUTPUT_NAME "c++" CACHE STRING "Output name for the static libc++ runtime library.") |
| |
| if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE) |
| set(LIBCXX_TARGET_SUBDIR ${LLVM_DEFAULT_TARGET_TRIPLE}) |
| if(LIBCXX_LIBDIR_SUBDIR) |
| string(APPEND LIBCXX_TARGET_SUBDIR /${LIBCXX_LIBDIR_SUBDIR}) |
| endif() |
| set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LIBCXX_TARGET_SUBDIR}) |
| set(LIBCXX_GENERATED_INCLUDE_DIR "${LLVM_BINARY_DIR}/include/c++/v1") |
| set(LIBCXX_GENERATED_MODULE_DIR "${LLVM_BINARY_DIR}/modules/c++/v1") |
| set(LIBCXX_GENERATED_INCLUDE_TARGET_DIR "${LLVM_BINARY_DIR}/include/${LIBCXX_TARGET_SUBDIR}/c++/v1") |
| set(LIBCXX_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LIBCXX_TARGET_SUBDIR} CACHE STRING |
| "Path where built libc++ libraries should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_TARGET_DIR "${CMAKE_INSTALL_INCLUDEDIR}/${LIBCXX_TARGET_SUBDIR}/c++/v1" CACHE STRING |
| "Path where target-specific libc++ headers should be installed.") |
| unset(LIBCXX_TARGET_SUBDIR) |
| else() |
| if(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_MODULE_DIR "${LLVM_BINARY_DIR}/modules/c++/v1") |
| else() |
| set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX}) |
| set(LIBCXX_GENERATED_INCLUDE_DIR "${CMAKE_BINARY_DIR}/include/c++/v1") |
| set(LIBCXX_GENERATED_MODULE_DIR "${CMAKE_BINARY_DIR}/modules/c++/v1") |
| endif() |
| set(LIBCXX_GENERATED_INCLUDE_TARGET_DIR "${LIBCXX_GENERATED_INCLUDE_DIR}") |
| set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX} CACHE STRING |
| "Path where built libc++ libraries should be installed.") |
| set(LIBCXX_INSTALL_INCLUDE_TARGET_DIR "${LIBCXX_INSTALL_INCLUDE_DIR}" CACHE STRING |
| "Path where target-specific libc++ headers should be installed.") |
| endif() |
| |
| file(MAKE_DIRECTORY "${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 ${LIBCXX_LIBRARY_DIR}) |
| |
| # Declare libc++ configuration variables. |
| # They are intended for use as follows: |
| # LIBCXX_CXX_FLAGS: General flags for both the compiler and linker. |
| # LIBCXX_COMPILE_FLAGS: Compile only flags. |
| # LIBCXX_LINK_FLAGS: Linker only flags. |
| # LIBCXX_LIBRARIES: libraries libc++ is linked to. |
| set(LIBCXX_COMPILE_FLAGS "") |
| set(LIBCXX_LINK_FLAGS "") |
| set(LIBCXX_LIBRARIES "") |
| set(LIBCXX_ADDITIONAL_COMPILE_FLAGS "" CACHE STRING |
| "Additional Compile only flags which can be provided in cache") |
| set(LIBCXX_ADDITIONAL_LIBRARIES "" CACHE STRING |
| "Additional libraries libc++ is linked to which can be provided in cache") |
| |
| # Include macros for adding and removing libc++ flags. |
| include(HandleLibcxxFlags) |
| |
| # Target flags ================================================================ |
| # These flags get added to CMAKE_CXX_FLAGS and CMAKE_C_FLAGS so that |
| # 'config-ix' use them during feature checks. It also adds them to both |
| # 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS' |
| |
| if (${CMAKE_SYSTEM_NAME} MATCHES "AIX") |
| add_flags_if_supported("-mdefault-visibility-export-mapping=explicit") |
| set(CMAKE_AIX_EXPORT_ALL_SYMBOLS OFF) |
| endif() |
| |
| # Configure compiler. |
| include(config-ix) |
| |
| #=============================================================================== |
| # Setup Compiler Flags |
| #=============================================================================== |
| |
| include(HandleLibC) # Setup the C library flags |
| include(HandleLibCXXABI) # Setup the ABI library flags |
| |
| # 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) |
| |
| # Use C++23 for all targets. |
| set_target_properties(${target} PROPERTIES |
| CXX_STANDARD 23 |
| CXX_STANDARD_REQUIRED OFF # TODO: Make this REQUIRED once we don't need to accommodate the LLVM documentation builders using an ancient CMake |
| CXX_EXTENSIONS NO) |
| |
| # When building the dylib, don't warn for unavailable aligned allocation |
| # functions based on the deployment target -- they are always available |
| # because they are provided by the dylib itself with the exception of z/OS. |
| if (ZOS) |
| target_add_compile_flags_if_supported(${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() |
| |
| # Build with -fsized-deallocation, which is default in recent versions of Clang. |
| # TODO(LLVM 21): This can be dropped once we only support Clang >= 19. |
| target_add_compile_flags_if_supported(${target} PRIVATE -fsized-deallocation) |
| |
| # Let the library headers know they are currently being used to build the |
| # library. |
| target_compile_definitions(${target} PRIVATE -D_LIBCPP_BUILDING_LIBRARY) |
| |
| # Make sure the library can be build without transitive includes. This makes |
| # it easier to upgrade the library to a newer language standard without build |
| # errors. |
| target_compile_definitions(${target} PRIVATE -D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) |
| |
| if (C_SUPPORTS_COMMENT_LIB_PRAGMA) |
| if (LIBCXX_HAS_PTHREAD_LIB) |
| target_compile_definitions(${target} PRIVATE -D_LIBCPP_LINK_PTHREAD_LIB) |
| endif() |
| if (LIBCXX_HAS_RT_LIB) |
| target_compile_definitions(${target} PRIVATE -D_LIBCPP_LINK_RT_LIB) |
| endif() |
| endif() |
| target_compile_options(${target} PUBLIC "${LIBCXX_ADDITIONAL_COMPILE_FLAGS}") |
| endfunction() |
| |
| # Exception flags ============================================================= |
| function(cxx_add_exception_flags target) |
| if (LIBCXX_ENABLE_EXCEPTIONS) |
| # Catches C++ exceptions only and tells the compiler to assume that extern C |
| # functions never throw a C++ exception. |
| target_add_compile_flags_if_supported(${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) |
| if (MSVC) |
| target_add_compile_flags_if_supported(${target} PUBLIC -GR-) |
| else() |
| target_add_compile_flags_if_supported(${target} PUBLIC -fno-rtti) |
| endif() |
| endif() |
| endfunction() |
| |
| # 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() |
| |
| string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) |
| |
| # Sanitizer flags ============================================================= |
| |
| function(get_sanitizer_flags OUT_VAR USE_SANITIZER) |
| set(SANITIZER_FLAGS) |
| set(USE_SANITIZER "${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 STREQUAL "HWAddress") |
| append_flags(SANITIZER_FLAGS "-fsanitize=hwaddress") |
| 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} "${SANITIZER_FLAGS}" PARENT_SCOPE) |
| endfunction() |
| |
| get_sanitizer_flags(SANITIZER_FLAGS "${LLVM_USE_SANITIZER}") |
| add_library(cxx-sanitizer-flags INTERFACE) |
| target_compile_options(cxx-sanitizer-flags INTERFACE ${SANITIZER_FLAGS}) |
| |
| # _LIBCPP_INSTRUMENTED_WITH_ASAN informs that library was built with ASan. |
| # Defining _LIBCPP_INSTRUMENTED_WITH_ASAN while building the library with ASan is required. |
| # Normally, the _LIBCPP_INSTRUMENTED_WITH_ASAN flag is used to keep information whether |
| # dylibs are built with AddressSanitizer. However, when building libc++, |
| # this flag needs to be defined so that the resulting dylib has all ASan functionalities guarded by this flag. |
| # If the _LIBCPP_INSTRUMENTED_WITH_ASAN flag is not defined, then parts of the ASan instrumentation code in libc++ |
| # will not be compiled into it, resulting in false positives. |
| # For context, read: https://github.com/llvm/llvm-project/pull/72677#pullrequestreview-1765402800 |
| string(FIND "${LLVM_USE_SANITIZER}" "Address" building_with_asan) |
| if (NOT "${building_with_asan}" STREQUAL "-1") |
| config_define(ON _LIBCPP_INSTRUMENTED_WITH_ASAN) |
| endif() |
| |
| # Link system libraries ======================================================= |
| function(cxx_link_system_libraries target) |
| if (NOT MSVC) |
| target_link_libraries(${target} PRIVATE "-nostdlib++") |
| endif() |
| |
| if (CXX_SUPPORTS_UNWINDLIB_EQ_NONE_FLAG AND LIBCXXABI_USE_LLVM_UNWINDER) |
| # If we're linking directly against the libunwind that we're building |
| # in the same invocation, don't try to link in the toolchain's |
| # default libunwind (which may be missing still). |
| target_add_link_flags_if_supported(${target} PRIVATE "--unwindlib=none") |
| endif() |
| |
| if (MSVC) |
| if (LIBCXX_USE_COMPILER_RT) |
| find_compiler_rt_library(builtins LIBCXX_BUILTINS_LIBRARY) |
| if (LIBCXX_BUILTINS_LIBRARY) |
| target_link_libraries(${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(${target} PRIVATE gcc_s) |
| endif() |
| endif() |
| |
| if (LIBCXX_HAS_ATOMIC_LIB) |
| target_link_libraries(${target} PRIVATE atomic) |
| endif() |
| |
| if (MINGW) |
| target_link_libraries(${target} PRIVATE "${MINGW_LIBRARIES}") |
| endif() |
| |
| if (MSVC) |
| if ((NOT CMAKE_MSVC_RUNTIME_LIBRARY AND uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG") |
| OR (CMAKE_MSVC_RUNTIME_LIBRARY MATCHES "Debug")) |
| set(LIB_SUFFIX "d") |
| else() |
| set(LIB_SUFFIX "") |
| endif() |
| |
| if (NOT CMAKE_MSVC_RUNTIME_LIBRARY OR CMAKE_MSVC_RUNTIME_LIBRARY MATCHES "DLL$") |
| set(CRT_LIB "msvcrt") |
| set(CXX_LIB "msvcprt") |
| else() |
| set(CRT_LIB "libcmt") |
| set(CXX_LIB "libcpmt") |
| endif() |
| |
| target_link_libraries(${target} PRIVATE ${CRT_LIB}${LIB_SUFFIX}) # C runtime startup files |
| target_link_libraries(${target} PRIVATE ${CXX_LIB}${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() |
| target_link_libraries(${target} PUBLIC "${LIBCXX_ADDITIONAL_LIBRARIES}") |
| endfunction() |
| |
| # Windows-related flags ======================================================= |
| function(cxx_add_windows_flags target) |
| if(WIN32 AND NOT MINGW) |
| target_compile_definitions(${target} PRIVATE |
| # Ignore the -MSC_VER mismatch, as we may build |
| # with a different compatibility version. |
| _ALLOW_MSC_VER_MISMATCH |
| # Don't check the msvcprt iterator debug levels |
| # as we will define the iterator types; libc++ |
| # uses a different macro to identify the debug |
| # level. |
| _ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH |
| # We are building the c++ runtime, don't pull in |
| # msvcprt. |
| _CRTBLD |
| # Don't warn on the use of "deprecated" |
| # "insecure" functions which are standards |
| # specified. |
| _CRT_SECURE_NO_WARNINGS |
| # Use the ISO conforming behaviour for conversion |
| # in printf, scanf. |
| _CRT_STDIO_ISO_WIDE_SPECIFIERS) |
| endif() |
| endfunction() |
| |
| # Configuration file flags ===================================================== |
| config_define(${LIBCXX_ABI_VERSION} _LIBCPP_ABI_VERSION) |
| config_define(${LIBCXX_ABI_NAMESPACE} _LIBCPP_ABI_NAMESPACE) |
| config_define_if(LIBCXX_ABI_FORCE_ITANIUM _LIBCPP_ABI_FORCE_ITANIUM) |
| config_define_if(LIBCXX_ABI_FORCE_MICROSOFT _LIBCPP_ABI_FORCE_MICROSOFT) |
| config_define_if_not(LIBCXX_ENABLE_THREADS _LIBCPP_HAS_NO_THREADS) |
| config_define_if_not(LIBCXX_ENABLE_MONOTONIC_CLOCK _LIBCPP_HAS_NO_MONOTONIC_CLOCK) |
| config_define_if_not(LIBCXX_HAS_TERMINAL_AVAILABLE _LIBCPP_HAS_NO_TERMINAL) |
| if (NOT LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION STREQUAL "default") |
| config_define("${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_HAS_MUSL_LIBC _LIBCPP_HAS_MUSL_LIBC) |
| config_define_if(LIBCXX_NO_VCRUNTIME _LIBCPP_NO_VCRUNTIME) |
| config_define_if_not(LIBCXX_ENABLE_FILESYSTEM _LIBCPP_HAS_NO_FILESYSTEM) |
| 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_TIME_ZONE_DATABASE _LIBCPP_HAS_NO_TIME_ZONE_DATABASE) |
| config_define_if_not(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS) |
| |
| if (LIBCXX_ENABLE_ASSERTIONS) |
| message(DEPRECATION "LIBCXX_ENABLE_ASSERTIONS is deprecated and will be removed in LLVM 20. Please use LIBCXX_HARDENING_MODE instead.") |
| set(LIBCXX_HARDENING_MODE "extensive") |
| endif() |
| if (LIBCXX_HARDENING_MODE STREQUAL "none") |
| config_define(2 _LIBCPP_HARDENING_MODE_DEFAULT) |
| elseif (LIBCXX_HARDENING_MODE STREQUAL "fast") |
| config_define(4 _LIBCPP_HARDENING_MODE_DEFAULT) |
| elseif (LIBCXX_HARDENING_MODE STREQUAL "extensive") |
| config_define(16 _LIBCPP_HARDENING_MODE_DEFAULT) |
| elseif (LIBCXX_HARDENING_MODE STREQUAL "debug") |
| config_define(8 _LIBCPP_HARDENING_MODE_DEFAULT) |
| endif() |
| |
| if (LIBCXX_PSTL_BACKEND STREQUAL "serial") |
| config_define(1 _LIBCPP_PSTL_BACKEND_SERIAL) |
| elseif(LIBCXX_PSTL_BACKEND STREQUAL "std_thread") |
| config_define(1 _LIBCPP_PSTL_BACKEND_STD_THREAD) |
| elseif(LIBCXX_PSTL_BACKEND STREQUAL "libdispatch") |
| config_define(1 _LIBCPP_PSTL_BACKEND_LIBDISPATCH) |
| else() |
| message(FATAL_ERROR "LIBCXX_PSTL_BACKEND is set to ${LIBCXX_PSTL_BACKEND}, which is not a valid backend. |
| Valid backends are: serial, std_thread and libdispatch") |
| endif() |
| |
| 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() |
| |
| if (LIBCXX_EXTRA_SITE_DEFINES) |
| set(extra_site_defines) |
| foreach (extra_site_define ${LIBCXX_EXTRA_SITE_DEFINES}) |
| # Allow defines such as DEFINE=VAL, transformed into "#define DEFINE VAL". |
| string(REPLACE "=" " " extra_site_define "${extra_site_define}") |
| list(APPEND extra_site_defines "#define ${extra_site_define}") |
| endforeach() |
| string(REPLACE ";" "\n" extra_site_defines "${extra_site_defines}") |
| config_define(${extra_site_defines} _LIBCPP_EXTRA_SITE_DEFINES) |
| endif() |
| |
| # By default libc++ on Windows expects to use a shared library, which requires |
| # the headers to use DLL import/export semantics. However when building a |
| # static library only we modify the headers to disable DLL import/export. |
| if (DEFINED WIN32 AND LIBCXX_ENABLE_STATIC AND NOT LIBCXX_ENABLE_SHARED) |
| message(STATUS "Generating custom __config for non-DLL Windows build") |
| config_define(ON _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| endif() |
| |
| if (WIN32 AND LIBCXX_ENABLE_STATIC_ABI_LIBRARY) |
| # If linking libcxxabi statically into libcxx, skip the dllimport attributes |
| # on symbols we refer to from libcxxabi. |
| add_definitions(-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS) |
| endif() |
| |
| # Setup all common build flags ================================================= |
| function(cxx_add_common_build_flags target) |
| cxx_add_basic_build_flags(${target}) |
| cxx_add_warning_flags(${target} ${LIBCXX_ENABLE_WERROR} ${LIBCXX_ENABLE_PEDANTIC}) |
| cxx_add_windows_flags(${target}) |
| cxx_add_exception_flags(${target}) |
| cxx_add_rtti_flags(${target}) |
| cxx_add_module_flags(${target}) |
| cxx_link_system_libraries(${target}) |
| target_link_libraries(${target} PRIVATE cxx-sanitizer-flags) |
| endfunction() |
| |
| #=============================================================================== |
| # Setup Source Code And Tests |
| #=============================================================================== |
| add_custom_target(cxx-test-depends |
| COMMENT "Build dependencies required to run the libc++ test suite.") |
| |
| add_subdirectory(include) |
| add_subdirectory(src) |
| add_subdirectory(utils) |
| add_subdirectory(modules) |
| |
| if (LIBCXX_INCLUDE_TESTS) |
| add_subdirectory(test) |
| add_subdirectory(lib/abi) |
| endif() |
| |
| if (LIBCXX_INCLUDE_DOCS) |
| add_subdirectory(docs) |
| endif() |