forked from OSchip/llvm-project
636 lines
27 KiB
CMake
636 lines
27 KiB
CMake
# See www/CMake.html for instructions on how to build libcxx with CMake.
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#===============================================================================
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# Setup Project
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#===============================================================================
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cmake_minimum_required(VERSION 3.4.3)
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if(POLICY CMP0042)
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cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
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endif()
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if(POLICY CMP0022)
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cmake_policy(SET CMP0022 NEW) # Required when interacting with LLVM and Clang
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endif()
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# Add path for custom modules
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set(CMAKE_MODULE_PATH
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
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${CMAKE_MODULE_PATH}
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)
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if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
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project(libcxx CXX C)
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set(PACKAGE_NAME libcxx)
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set(PACKAGE_VERSION 5.0.0svn)
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set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
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# Find the LLVM sources and simulate LLVM CMake options.
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include(HandleOutOfTreeLLVM)
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endif()
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if (LIBCXX_STANDALONE_BUILD)
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include(FindPythonInterp)
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if( NOT PYTHONINTERP_FOUND )
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message(WARNING "Failed to find python interpreter. "
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"The libc++ test suite will be disabled.")
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set(LLVM_INCLUDE_TESTS OFF)
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endif()
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endif()
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# Require out of source build.
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include(MacroEnsureOutOfSourceBuild)
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MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
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"${PROJECT_NAME} requires an out of source build. Please create a separate
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build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there."
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)
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if (MSVC)
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set(LIBCXX_TARGETING_MSVC ON)
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else()
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set(LIBCXX_TARGETING_MSVC OFF)
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endif()
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#===============================================================================
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# Setup CMake Options
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#===============================================================================
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include(CMakeDependentOption)
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include(HandleCompilerRT)
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# Basic options ---------------------------------------------------------------
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option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." OFF)
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option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
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option(LIBCXX_ENABLE_STATIC "Build libc++ as a static library." ON)
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option(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY "Build libc++experimental.a" ON)
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option(LIBCXX_ENABLE_FILESYSTEM
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"Build filesystem as part of libc++experimental.a" ${LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY})
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option(LIBCXX_INCLUDE_TESTS "Build the libc++ tests." ${LLVM_INCLUDE_TESTS})
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# Benchmark options -----------------------------------------------------------
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option(LIBCXX_INCLUDE_BENCHMARKS "Build the libc++ benchmarks and their dependancies" ON)
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set(LIBCXX_BENCHMARK_NATIVE_STDLIB "" CACHE STRING
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"Build the benchmarks against the specified native STL.
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The value must be one of libc++/libstdc++")
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set(LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN "" CACHE STRING
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"Use alternate GCC toolchain when building the native benchmarks")
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if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
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if (NOT (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++"
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OR LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++"))
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message(FATAL_ERROR "Invalid value for LIBCXX_BENCHMARK_NATIVE_STDLIB: "
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"'${LIBCXX_BENCHMARK_NATIVE_STDLIB}'")
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endif()
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endif()
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option(LIBCXX_INCLUDE_DOCS "Build the libc++ documentation." ${LLVM_INCLUDE_DOCS})
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set(LIBCXX_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
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"Define suffix of library directory name (32/64)")
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option(LIBCXX_INSTALL_HEADERS "Install the libc++ headers." ON)
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option(LIBCXX_INSTALL_LIBRARY "Install the libc++ library." ON)
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option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON)
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cmake_dependent_option(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY
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"Install libc++experimental.a" ON
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"LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY;LIBCXX_INSTALL_LIBRARY" OFF)
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set(LIBCXX_ABI_VERSION 1 CACHE STRING "ABI version of libc++.")
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option(LIBCXX_ABI_UNSTABLE "Unstable ABI of libc++." OFF)
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option(LIBCXX_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
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if (NOT LIBCXX_ENABLE_SHARED AND NOT LIBCXX_ENABLE_STATIC)
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message(FATAL_ERROR "libc++ must be built as either a shared or static library.")
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endif()
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# ABI Library options ---------------------------------------------------------
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set(LIBCXX_CXX_ABI "default" CACHE STRING
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"Specify C++ ABI library to use.")
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set(CXXABIS none default libcxxabi libcxxrt libstdc++ libsupc++ vcruntime)
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set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS})
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# Setup the default options if LIBCXX_CXX_ABI is not specified.
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if (LIBCXX_CXX_ABI STREQUAL "default")
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find_path(
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LIBCXX_LIBCXXABI_INCLUDES_INTERNAL
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cxxabi.h
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PATHS ${LLVM_MAIN_SRC_DIR}/projects/libcxxabi/include
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${LLVM_MAIN_SRC_DIR}/runtimes/libcxxabi/include
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NO_DEFAULT_PATH
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)
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if ((NOT LIBCXX_STANDALONE_BUILD OR HAVE_LIBCXXABI) AND
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IS_DIRECTORY "${LIBCXX_LIBCXXABI_INCLUDES_INTERNAL}")
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set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi")
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set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${LIBCXX_LIBCXXABI_INCLUDES_INTERNAL}")
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set(LIBCXX_CXX_ABI_INTREE 1)
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else()
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if (LIBCXX_TARGETING_MSVC)
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# FIXME: Figure out how to configure the ABI library on Windows.
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set(LIBCXX_CXX_ABI_LIBNAME "vcruntime")
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elseif(APPLE)
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set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi")
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set(LIBCXX_CXX_ABI_SYSTEM 1)
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else()
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set(LIBCXX_CXX_ABI_LIBNAME "default")
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endif()
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endif()
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else()
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set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}")
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endif()
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# Use a static copy of the ABI library when linking libc++. This option
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# cannot be used with LIBCXX_ENABLE_ABI_LINKER_SCRIPT.
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option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY "Statically link the ABI library" OFF)
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# Generate and install a linker script inplace of libc++.so. The linker script
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# will link libc++ to the correct ABI library. This option is on by default
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# on UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY'
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# is on. This option is also disabled when the ABI library is not specified
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# or is specified to be "none".
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set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF)
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if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_ENABLE_STATIC_ABI_LIBRARY
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AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"
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AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "default"
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AND PYTHONINTERP_FOUND
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AND LIBCXX_ENABLE_SHARED)
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set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON)
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endif()
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option(LIBCXX_ENABLE_ABI_LINKER_SCRIPT
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"Use and install a linker script for the given ABI library"
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${ENABLE_LINKER_SCRIPT_DEFAULT_VALUE})
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set(ENABLE_NEW_DELETE_DEFAULT ON)
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if (LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS)
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# FIXME: This option should default to off. Unfortunatly GCC 4.9 fails to link
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# programs due to undefined references to new/delete in libc++abi so to work
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# around this libc++abi currently defaults LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS
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# to ON. Once the GCC bug has been worked around this option should be changed
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# back to OFF.
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set(ENABLE_NEW_DELETE_DEFAULT ON)
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endif()
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option(LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS
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"Build libc++ with definitions for operator new/delete. This option can
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be used to disable the definitions when libc++abi is expected to provide
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them" ${ENABLE_NEW_DELETE_DEFAULT})
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# Build libc++abi with libunwind. We need this option to determine whether to
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# link with libunwind or libgcc_s while running the test cases.
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option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF)
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option(LIBCXXABI_ENABLE_STATIC_UNWINDER "Statically link the LLVM unwinder." OFF)
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# Target options --------------------------------------------------------------
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option(LIBCXX_BUILD_32_BITS "Build 32 bit libc++." ${LLVM_BUILD_32_BITS})
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set(LIBCXX_SYSROOT "" CACHE STRING "Use alternate sysroot.")
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set(LIBCXX_GCC_TOOLCHAIN "" CACHE STRING "Use alternate GCC toolchain.")
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# Feature options -------------------------------------------------------------
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option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON)
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option(LIBCXX_ENABLE_RTTI "Use run time type information." ON)
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option(LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE "Build libc++ with support for the global filesystem namespace." ON)
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option(LIBCXX_ENABLE_STDIN "Build libc++ with support for stdin/std::cin." ON)
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option(LIBCXX_ENABLE_STDOUT "Build libc++ with support for stdout/std::cout." ON)
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option(LIBCXX_ENABLE_THREADS "Build libc++ with support for threads." ON)
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option(LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS "Build libc++ with support for thread-unsafe C functions" ON)
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option(LIBCXX_ENABLE_MONOTONIC_CLOCK
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"Build libc++ with support for a monotonic clock.
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This option may only be set to OFF when LIBCXX_ENABLE_THREADS=OFF." ON)
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option(LIBCXX_HAS_MUSL_LIBC "Build libc++ with support for the Musl C library" OFF)
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option(LIBCXX_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF)
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option(LIBCXX_HAS_EXTERNAL_THREAD_API
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"Build libc++ with an externalized threading API.
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This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON." OFF)
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option(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY
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"Build libc++ with an externalized threading library.
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This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON" OFF)
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# Misc options ----------------------------------------------------------------
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# FIXME: Turn -pedantic back ON. It is currently off because it warns
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# about #include_next which is used everywhere.
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option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF)
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option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
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option(LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS "Disable #warnings about conflicting macros." OFF)
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option(LIBCXX_GENERATE_COVERAGE "Enable generating code coverage." OFF)
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set(LIBCXX_COVERAGE_LIBRARY "" CACHE STRING
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"The Profile-rt library used to build with code coverage")
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# Don't allow a user to accidentally overwrite the system libc++ installation on Darwin.
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# If the user specifies -DCMAKE_INSTALL_PREFIX=/usr the install rules for libc++
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# will not be generated and a warning will be issued.
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option(LIBCXX_OVERRIDE_DARWIN_INSTALL "Enable overwriting darwins libc++ installation." OFF)
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mark_as_advanced(LIBCXX_OVERRIDE_DARWIN_INSTALL) # Don't show this option by default.
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if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND NOT LIBCXX_OVERRIDE_DARWIN_INSTALL)
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if ("${CMAKE_INSTALL_PREFIX}" STREQUAL "/usr")
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message(WARNING "Disabling libc++ install rules because installation would "
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"overwrite the systems installation. Configure with "
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"-DLIBCXX_OVERRIDE_DARWIN_INSTALL=ON to suppress this behaviour.")
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mark_as_advanced(CLEAR LIBCXX_OVERRIDE_DARWIN_INSTALL) # Show the override option.
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set(LIBCXX_INSTALL_HEADERS OFF)
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set(LIBCXX_INSTALL_LIBRARY OFF)
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endif()
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endif()
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set(LIBCXX_CONFIGURE_IDE_DEFAULT OFF)
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if (XCODE OR MSVC_IDE)
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set(LIBCXX_CONFIGURE_IDE_DEFAULT ON)
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endif()
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option(LIBCXX_CONFIGURE_IDE "Configure libcxx for use within an IDE"
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${LIBCXX_CONFIGURE_IDE_DEFAULT})
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#===============================================================================
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# Check option configurations
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#===============================================================================
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if (LIBCXX_ENABLE_FILESYSTEM AND NOT LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY)
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message(FATAL_ERROR
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"LIBCXX_ENABLE_FILESYSTEM cannot be turned on when LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF")
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endif()
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# Ensure LIBCXX_ENABLE_MONOTONIC_CLOCK is set to ON only when
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# LIBCXX_ENABLE_THREADS is on.
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if(LIBCXX_ENABLE_THREADS AND NOT LIBCXX_ENABLE_MONOTONIC_CLOCK)
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message(FATAL_ERROR "LIBCXX_ENABLE_MONOTONIC_CLOCK can only be set to OFF"
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" when LIBCXX_ENABLE_THREADS is also set to OFF.")
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endif()
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if(NOT LIBCXX_ENABLE_THREADS)
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if(LIBCXX_HAS_PTHREAD_API)
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message(FATAL_ERROR "LIBCXX_HAS_PTHREAD_API can only be set to ON"
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" when LIBCXX_ENABLE_THREADS is also set to ON.")
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endif()
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if(LIBCXX_HAS_EXTERNAL_THREAD_API)
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message(FATAL_ERROR "LIBCXX_HAS_EXTERNAL_THREAD_API can only be set to ON"
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" when LIBCXX_ENABLE_THREADS is also set to ON.")
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endif()
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if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
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message(FATAL_ERROR "LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY can only be set "
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"to ON when LIBCXX_ENABLE_THREADS is also set to ON.")
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endif()
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endif()
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if (LIBCXX_HAS_EXTERNAL_THREAD_API)
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if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
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message(FATAL_ERROR "The options LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY and "
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"LIBCXX_HAS_EXTERNAL_THREAD_API cannot both be ON at "
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"the same time")
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endif()
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if (LIBCXX_HAS_PTHREAD_API)
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message(FATAL_ERROR "The options LIBCXX_HAS_EXTERNAL_THREAD_API"
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"and LIBCXX_HAS_PTHREAD_API cannot be both"
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"set to ON at the same time.")
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endif()
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endif()
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# Ensure LLVM_USE_SANITIZER is not specified when LIBCXX_GENERATE_COVERAGE
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# is ON.
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if (LLVM_USE_SANITIZER AND LIBCXX_GENERATE_COVERAGE)
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message(FATAL_ERROR "LLVM_USE_SANITIZER cannot be used with LIBCXX_GENERATE_COVERAGE")
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endif()
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# Set LIBCXX_BUILD_32_BITS to (LIBCXX_BUILD_32_BITS OR LLVM_BUILD_32_BITS)
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# and check that we can build with 32 bits if requested.
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if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
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if (LIBCXX_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
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message(STATUS "Building 32 bits executables and libraries.")
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endif()
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elseif(LIBCXX_BUILD_32_BITS)
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message(FATAL_ERROR "LIBCXX_BUILD_32_BITS=ON is not supported on this platform.")
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endif()
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# Check that this option is not enabled on Apple and emit a usage warning.
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if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
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if (APPLE)
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message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is not supported on OS X")
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else()
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message(WARNING "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is an experimental option")
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endif()
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if (LIBCXX_ENABLE_STATIC AND NOT PYTHONINTERP_FOUND)
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message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY requires python but it was not found.")
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endif()
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endif()
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if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
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if (APPLE)
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message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT cannot be used on APPLE targets")
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endif()
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if (NOT PYTHONINTERP_FOUND)
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message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT requires python but it was not found.")
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endif()
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if (NOT LIBCXX_ENABLE_SHARED)
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message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT is only available for shared library builds.")
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endif()
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endif()
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if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
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message(FATAL_ERROR "Conflicting options given.
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LIBCXX_ENABLE_STATIC_ABI_LIBRARY cannot be specified with
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LIBCXX_ENABLE_ABI_LINKER_SCRIPT")
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endif()
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if (LIBCXX_HAS_MUSL_LIBC AND NOT LIBCXX_INSTALL_SUPPORT_HEADERS)
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message(FATAL_ERROR "LIBCXX_INSTALL_SUPPORT_HEADERS can not be turned off"
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"when building for Musl with LIBCXX_HAS_MUSL_LIBC.")
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endif()
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#===============================================================================
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# Configure System
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#===============================================================================
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set(LIBCXX_COMPILER ${CMAKE_CXX_COMPILER})
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set(LIBCXX_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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set(LIBCXX_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
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set(LIBCXX_BINARY_INCLUDE_DIR "${LIBCXX_BINARY_DIR}/include/c++build")
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set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
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file(MAKE_DIRECTORY "${LIBCXX_BINARY_INCLUDE_DIR}")
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set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
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# Declare libc++ configuration variables.
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# They are intended for use as follows:
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# LIBCXX_CXX_FLAGS: General flags for both the compiler and linker.
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# LIBCXX_COMPILE_FLAGS: Compile only flags.
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# LIBCXX_LINK_FLAGS: Linker only flags.
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# LIBCXX_LIBRARIES: libraries libc++ is linked to.
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# LIBCXX_INTERFACE_LIBRARIES: Libraries that must be linked when using libc++
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# These libraries are exposed in the linker script.
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set(LIBCXX_COMPILE_FLAGS "")
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set(LIBCXX_LINK_FLAGS "")
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set(LIBCXX_LIBRARIES "")
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set(LIBCXX_INTERFACE_LIBRARIES "")
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# Include macros for adding and removing libc++ flags.
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include(HandleLibcxxFlags)
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# Target flags ================================================================
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# These flags get added to CMAKE_CXX_FLAGS and CMAKE_C_FLAGS so that
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# 'config-ix' use them during feature checks. It also adds them to both
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# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'
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add_target_flags_if(LIBCXX_BUILD_32_BITS "-m32")
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add_target_flags_if(LIBCXX_TARGET_TRIPLE "-target ${LIBCXX_TARGET_TRIPLE}")
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add_target_flags_if(LIBCXX_SYSROOT "--sysroot=${LIBCXX_SYSROOT}")
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add_target_flags_if(LIBCXX_GCC_TOOLCHAIN "-gcc-toolchain ${LIBCXX_GCC_TOOLCHAIN}")
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if (LIBCXX_TARGET_TRIPLE)
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set(TARGET_TRIPLE "${LIBCXX_TARGET_TRIPLE}")
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endif()
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# Configure compiler.
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include(config-ix)
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if (LIBCXX_USE_COMPILER_RT)
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list(APPEND LIBCXX_LINK_FLAGS "-rtlib=compiler-rt")
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endif()
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# Configure coverage options.
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if (LIBCXX_GENERATE_COVERAGE)
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include(CodeCoverage)
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set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE)
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endif()
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string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
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if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
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set(LIBCXX_DEBUG_BUILD ON)
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else()
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set(LIBCXX_DEBUG_BUILD OFF)
|
|
endif()
|
|
|
|
#===============================================================================
|
|
# Setup Compiler Flags
|
|
#===============================================================================
|
|
|
|
include(HandleLibCXXABI) # Setup the ABI library flags
|
|
|
|
if (NOT LIBCXX_STANDALONE_BUILD)
|
|
# Remove flags that may have snuck in.
|
|
remove_flags(-DNDEBUG -UNDEBUG -D_DEBUG
|
|
-lc++abi)
|
|
endif()
|
|
remove_flags(-stdlib=libc++ -stdlib=libstdc++)
|
|
|
|
# FIXME: Remove all debug flags and flags that change which Windows
|
|
# default libraries are linked. Currently we only support linking the
|
|
# non-debug DLLs
|
|
remove_flags("/D_DEBUG" "/MTd" "/MDd" "/MT" "/Md")
|
|
|
|
# FIXME(EricWF): See the FIXME on LIBCXX_ENABLE_PEDANTIC.
|
|
# Remove the -pedantic flag and -Wno-pedantic and -pedantic-errors
|
|
# so they don't get transformed into -Wno and -errors respectively.
|
|
remove_flags(-Wno-pedantic -pedantic-errors -pedantic)
|
|
|
|
# Required flags ==============================================================
|
|
set(LIBCXX_STANDARD_VER c++11 CACHE INTERNAL "internal option to change build dialect")
|
|
if (LIBCXX_HAS_MUSL_LIBC)
|
|
# musl's pthread implementations uses volatile types in their structs which is
|
|
# not a constexpr in C++11 but is in C++14, so we use C++14 with musl.
|
|
set(LIBCXX_STANDARD_VER c++14 CACHE INTERNAL "internal option to change build dialect")
|
|
endif()
|
|
add_compile_flags_if_supported(-std=${LIBCXX_STANDARD_VER})
|
|
mangle_name("LIBCXX_SUPPORTS_STD_EQ_${LIBCXX_STANDARD_VER}_FLAG" SUPPORTS_DIALECT_NAME)
|
|
if(NOT ${SUPPORTS_DIALECT_NAME})
|
|
if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" AND NOT "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
|
|
message(FATAL_ERROR "C++11 or greater is required but the compiler does not support ${LIBCXX_STANDARD_VER}")
|
|
endif()
|
|
endif()
|
|
|
|
# On all systems the system c++ standard library headers need to be excluded.
|
|
# MSVC only has -X, which disables all default includes; including the crt.
|
|
# Thus, we do nothing and hope we don't accidentally include any of the C++
|
|
# headers
|
|
add_compile_flags_if_supported(-nostdinc++)
|
|
|
|
# Hide all inline function definitions which have not explicitly been marked
|
|
# visible. This prevents new definitions for inline functions from appearing in
|
|
# the dylib when get ODR used by another function.
|
|
add_compile_flags_if_supported(-fvisibility-inlines-hidden)
|
|
|
|
# Let the library headers know they are currently being used to build the
|
|
# library.
|
|
add_definitions(-D_LIBCPP_BUILDING_LIBRARY)
|
|
|
|
if (NOT LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS)
|
|
add_definitions(-D_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS)
|
|
endif()
|
|
|
|
# Warning flags ===============================================================
|
|
add_definitions(-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
add_compile_flags_if_supported(
|
|
-Wall -Wextra -W -Wwrite-strings
|
|
-Wno-unused-parameter -Wno-long-long
|
|
-Werror=return-type)
|
|
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
|
|
add_compile_flags_if_supported(
|
|
-Wno-user-defined-literals
|
|
-Wno-covered-switch-default)
|
|
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
|
|
add_compile_flags_if_supported(
|
|
-Wno-literal-suffix
|
|
-Wno-c++14-compat
|
|
-Wno-noexcept-type)
|
|
endif()
|
|
if (LIBCXX_ENABLE_WERROR)
|
|
add_compile_flags_if_supported(-Werror)
|
|
add_compile_flags_if_supported(-WX)
|
|
else()
|
|
# TODO(EricWF) Remove this. We shouldn't be suppressing errors when -Werror is
|
|
# added elsewhere.
|
|
add_compile_flags_if_supported(-Wno-error)
|
|
endif()
|
|
if (LIBCXX_ENABLE_PEDANTIC)
|
|
add_compile_flags_if_supported(-pedantic)
|
|
endif()
|
|
if (LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS)
|
|
add_definitions(-D_LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS)
|
|
endif()
|
|
|
|
# Exception flags =============================================================
|
|
if (LIBCXX_ENABLE_EXCEPTIONS)
|
|
# Catches C++ exceptions only and tells the compiler to assume that extern C
|
|
# functions never throw a C++ exception.
|
|
add_compile_flags_if_supported(-EHsc)
|
|
else()
|
|
add_definitions(-D_LIBCPP_NO_EXCEPTIONS)
|
|
add_compile_flags_if_supported(-EHs- -EHa-)
|
|
add_compile_flags_if_supported(-fno-exceptions)
|
|
endif()
|
|
|
|
# RTTI flags ==================================================================
|
|
if (NOT LIBCXX_ENABLE_RTTI)
|
|
add_definitions(-D_LIBCPP_NO_RTTI)
|
|
add_compile_flags_if_supported(-GR-)
|
|
add_compile_flags_if_supported(-fno-rtti)
|
|
endif()
|
|
|
|
# Threading flags =============================================================
|
|
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXX_ENABLE_SHARED)
|
|
# Need to allow unresolved symbols if this is to work with shared library builds
|
|
if (APPLE)
|
|
add_link_flags("-undefined dynamic_lookup")
|
|
else()
|
|
# Relax this restriction from HandleLLVMOptions
|
|
string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${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.
|
|
if (LLVM_ENABLE_MODULES)
|
|
# Ignore that the rest of the modules flags are now unused.
|
|
add_compile_flags_if_supported(-Wno-unused-command-line-argument)
|
|
add_compile_flags(-fno-modules)
|
|
endif()
|
|
|
|
# Sanitizer flags =============================================================
|
|
|
|
# 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")
|
|
# 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 (LLVM_USE_SANITIZER AND NOT MSVC)
|
|
add_flags_if_supported("-fno-omit-frame-pointer")
|
|
add_flags_if_supported("-gline-tables-only")
|
|
|
|
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
|
|
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
|
|
add_flags_if_supported("-gline-tables-only")
|
|
endif()
|
|
if (LLVM_USE_SANITIZER STREQUAL "Address")
|
|
add_flags("-fsanitize=address")
|
|
elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
|
|
add_flags(-fsanitize=memory)
|
|
if (LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
|
|
add_flags("-fsanitize-memory-track-origins")
|
|
endif()
|
|
elseif (LLVM_USE_SANITIZER STREQUAL "Undefined")
|
|
add_flags("-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all")
|
|
elseif (LLVM_USE_SANITIZER STREQUAL "Thread")
|
|
add_flags(-fsanitize=thread)
|
|
else()
|
|
message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
|
|
endif()
|
|
elseif(LLVM_USE_SANITIZER AND MSVC)
|
|
message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
|
|
endif()
|
|
endif()
|
|
|
|
# Configuration file flags =====================================================
|
|
if (NOT LIBCXX_ABI_VERSION EQUAL "1")
|
|
config_define(${LIBCXX_ABI_VERSION} _LIBCPP_ABI_VERSION)
|
|
endif()
|
|
config_define_if(LIBCXX_ABI_UNSTABLE _LIBCPP_ABI_UNSTABLE)
|
|
|
|
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)
|
|
|
|
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_BUILD_EXTERNAL_THREAD_LIBRARY _LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL)
|
|
config_define_if(LIBCXX_HAS_MUSL_LIBC _LIBCPP_HAS_MUSL_LIBC)
|
|
|
|
# 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 (LIBCXX_NEEDS_SITE_CONFIG)
|
|
configure_file("include/__config_site.in"
|
|
"${LIBCXX_BINARY_DIR}/__config_site"
|
|
@ONLY)
|
|
|
|
# Provide the config definitions by included the generated __config_site
|
|
# file at compile time.
|
|
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" OR "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
|
|
add_compile_flags("/FI\"${LIBCXX_BINARY_DIR}/__config_site\"")
|
|
else()
|
|
add_compile_flags("-include ${LIBCXX_BINARY_DIR}/__config_site")
|
|
endif()
|
|
endif()
|
|
|
|
#===============================================================================
|
|
# Setup Source Code And Tests
|
|
#===============================================================================
|
|
include_directories(include)
|
|
add_subdirectory(include)
|
|
add_subdirectory(lib)
|
|
|
|
|
|
if (LIBCXX_INCLUDE_BENCHMARKS)
|
|
add_subdirectory(benchmarks)
|
|
endif()
|
|
|
|
# Create the lit.site.cfg file even when LIBCXX_INCLUDE_TESTS is OFF or
|
|
# LLVM_FOUND is OFF. This allows users to run the tests manually using
|
|
# LIT without requiring a full LLVM checkout.
|
|
add_subdirectory(test)
|
|
if (LIBCXX_INCLUDE_TESTS)
|
|
add_subdirectory(lib/abi)
|
|
endif()
|
|
|
|
if (LIBCXX_INCLUDE_DOCS)
|
|
add_subdirectory(docs)
|
|
endif()
|