forked from OSchip/llvm-project
407 lines
17 KiB
CMake
407 lines
17 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 2.8)
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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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${CMAKE_MODULE_PATH}
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)
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# Find the LLVM sources and simulate LLVM CMake options.
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include(HandleOutOfTreeLLVM)
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if (LIBCXX_BUILT_STANDALONE)
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project(libcxx CXX C)
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set(PACKAGE_NAME libcxx)
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set(PACKAGE_VERSION trunk-svn)
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set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
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endif ()
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if (LIBCXX_BUILT_STANDALONE AND NOT LLVM_FOUND)
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message(WARNING "UNSUPPORTED LIBCXX CONFIGURATION DETECTED: "
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"llvm-config not found and LLVM_PATH not defined.\n"
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"Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
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"or -DLLVM_PATH=path/to/llvm-source-root.")
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endif()
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# Require out of source build.
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include(MacroEnsureOutOfSourceBuild)
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MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
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"${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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#===============================================================================
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# Setup CMake Options
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#===============================================================================
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# Basic options ---------------------------------------------------------------
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option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
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option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
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option(LIBCXX_INCLUDE_TESTS "Build the libc++ tests." ${LLVM_INCLUDE_TESTS})
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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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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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# ABI Library options ---------------------------------------------------------
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set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING
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"Specify C++ ABI library to use." FORCE)
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set(CXXABIS none libcxxabi libcxxrt libstdc++ libsupc++)
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set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS})
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# Setup the default options if LIBCXX_CXX_ABI is not specified.
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if (NOT LIBCXX_CXX_ABI)
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if (NOT DEFINED LIBCXX_BUILT_STANDALONE AND
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IS_DIRECTORY "${CMAKE_SOURCE_DIR}/projects/libcxxabi")
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set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi")
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set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${CMAKE_SOURCE_DIR}/projects/libcxxabi/include")
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set(LIBCXX_CXX_ABI_INTREE 1)
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else ()
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set(LIBCXX_CXX_ABI_LIBNAME "none")
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endif ()
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else ()
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set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}")
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endif ()
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# Use a static copy of the ABI library when linking libc++. This option
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# cannot be used with LIBCXX_ENABLE_ABI_LINKER_SCRIPT.
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option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY "Statically link the ABI library" OFF)
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# Generate and install a linker script inplace of libc++.so. The linker script
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# will link libc++ to the correct ABI library. This option is on by default
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# On UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY'
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# is on. This option is also disabled when the ABI library is not specified
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# or is specified to be "none".
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set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF)
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if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_ENABLE_STATIC_ABI_LIBRARY
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AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"
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AND PYTHONINTERP_FOUND)
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set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON)
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endif()
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option(LIBCXX_ENABLE_ABI_LINKER_SCRIPT
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"Use and install a linker script for the given ABI library"
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${ENABLE_LINKER_SCRIPT_DEFAULT_VALUE})
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# 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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# 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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# 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_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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# 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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# 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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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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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_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
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set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
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# Declare libc++ configuration variables.
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# They are intended for use as follows:
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# LIBCXX_CXX_FLAGS: General flags for both the compiler and linker.
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# LIBCXX_COMPILE_FLAGS: Compile only flags.
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# LIBCXX_LINK_FLAGS: Linker only flags.
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set(LIBCXX_COMPILE_FLAGS "")
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set(LIBCXX_LINK_FLAGS "")
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set(LIBCXX_LIBRARIES "")
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# Configure compiler.
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include(config-ix)
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# Configure coverage options.
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if (LIBCXX_GENERATE_COVERAGE)
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include(CodeCoverage)
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set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE)
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endif()
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string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
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#===============================================================================
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# Setup Compiler Flags
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#===============================================================================
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include(HandleLibCXXABI) # Steup the ABI library flags
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# Include macros for adding and removing libc++ flags.
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include(HandleLibcxxFlags)
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# Remove flags that may have snuck in.
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remove_flags(-DNDEBUG -UNDEBUG -D_DEBUG
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-stdlib=libc++ -stdlib=libstdc++ -lc++abi -m32)
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# FIXME(EricWF): See the FIXME on LIBCXX_ENABLE_PEDANTIC.
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# Remove the -pedantic flag and -Wno-pedantic and -pedantic-errors
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# so they don't get transformed into -Wno and -errors respectivly.
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remove_flags(-Wno-pedantic -pedantic-errors -pedantic)
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# Required flags ==============================================================
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add_compile_flags_if_supported(-std=c++11)
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if (NOT MSVC AND NOT LIBCXX_SUPPORTS_STD_EQ_CXX11_FLAG)
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message(FATAL_ERROR "C++11 is required but the compiler does not support -std=c++11")
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endif()
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# On all systems the system c++ standard library headers need to be excluded.
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# MSVC only has -X, which disables all default includes; including the crt.
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# Thus, we do nothing and hope we don't accidentally include any of the C++
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# headers
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add_compile_flags_if_supported(-nostdinc++)
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# Target flags ================================================================
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add_flags_if(LIBCXX_BUILD_32_BITS -m32)
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add_flags_if(LIBCXX_TARGET_TRIPLE "-target ${LIBCXX_TARGET_TRIPLE}")
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add_flags_if(LIBCXX_SYSROOT "--sysroot ${LIBCXX_SYSROOT}")
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add_flags_if(LIBCXX_GCC_TOOLCHAIN "-gcc-toolchain ${LIBCXX_GCC_TOOLCHAIN}")
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# Warning flags ===============================================================
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add_definitions(-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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add_compile_flags_if_supported(
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-Wall -W -Wwrite-strings
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-Wno-unused-parameter -Wno-long-long
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-Werror=return-type)
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if (LIBCXX_ENABLE_WERROR)
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add_compile_flags_if_supported(-Werror)
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add_compile_flags_if_supported(-WX)
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else()
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# TODO(EricWF) Remove this. We shouldn't be suppressing errors when -Werror is
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# added elsewhere.
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add_compile_flags_if_supported(-Wno-error)
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endif()
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if (LIBCXX_ENABLE_PEDANTIC)
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add_compile_flags_if_supported(-pedantic)
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endif()
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# Exception flags =============================================================
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if (LIBCXX_ENABLE_EXCEPTIONS)
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# Catches C++ exceptions only and tells the compiler to assume that extern C
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# functions never throw a C++ exception.
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add_compile_flags_if_supported(-EHsc)
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else()
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add_definitions(-D_LIBCPP_NO_EXCEPTIONS)
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add_compile_flags_if_supported(-EHs- -EHa-)
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add_compile_flags_if_supported(-fno-exceptions)
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endif()
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# RTTI flags ==================================================================
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if (NOT LIBCXX_ENABLE_RTTI)
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add_definitions(-D_LIBCPP_NO_RTTI)
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add_compile_flags_if_supported(-GR-)
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add_compile_flags_if_supported(-fno-rtti)
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endif()
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# Assertion flags =============================================================
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define_if(LIBCXX_ENABLE_ASSERTIONS -UNDEBUG)
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define_if_not(LIBCXX_ENABLE_ASSERTIONS -DNDEBUG)
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if (LIBCXX_ENABLE_ASSERTIONS)
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# MSVC doesn't like _DEBUG on release builds. See PR 4379.
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define_if_not(MSVC -D_DEBUG)
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endif()
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# Feature flags ===============================================================
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define_if(MSVC -D_CRT_SECURE_NO_WARNINGS)
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# Sanitizer flags =============================================================
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# Configure for sanitizers. If LIBCXX_BUILT_STANDALONE then we have to do
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# the flag translation ourselves. Othewise LLVM's CMakeList.txt will handle it.
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if (LIBCXX_BUILT_STANDALONE)
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set(LLVM_USE_SANITIZER "" CACHE STRING
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"Define the sanitizer used to build the library and tests")
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# NOTE: LLVM_USE_SANITIZER checks for a UNIX like system instead of MSVC.
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# But we don't have LLVM_ON_UNIX so checking for MSVC is the best we can do.
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if (LLVM_USE_SANITIZER AND NOT MSVC)
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add_flags_if_supported("-fno-omit-frame-pointer")
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add_flags_if_supported("-gline-tables-only")
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if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
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NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
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add_flags_if_supported("-gline-tables-only")
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endif()
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if (LLVM_USE_SANITIZER STREQUAL "Address")
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add_flags("-fsanitize=address")
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elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
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add_flags(-fsanitize=memory)
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if (LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
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add_flags("-fsanitize-memory-track-origins")
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endif()
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elseif (LLVM_USE_SANITIZER STREQUAL "Undefined")
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add_flags("-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all")
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elseif (LLVM_USE_SANITIZER STREQUAL "Thread")
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add_flags(-fsanitize=thread)
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else()
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message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
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endif()
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elseif(LLVM_USE_SANITIZER AND MSVC)
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message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
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endif()
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endif()
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# Configuration file flags =====================================================
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if (NOT LIBCXX_ABI_VERSION EQUAL "1")
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config_define(${LIBCXX_ABI_VERSION} _LIBCPP_ABI_VERSION)
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endif()
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config_define_if(LIBCXX_ABI_UNSTABLE _LIBCPP_ABI_UNSTABLE)
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config_define_if_not(LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE)
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config_define_if_not(LIBCXX_ENABLE_STDIN _LIBCPP_HAS_NO_STDIN)
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config_define_if_not(LIBCXX_ENABLE_STDOUT _LIBCPP_HAS_NO_STDOUT)
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config_define_if_not(LIBCXX_ENABLE_THREADS _LIBCPP_HAS_NO_THREADS)
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config_define_if_not(LIBCXX_ENABLE_MONOTONIC_CLOCK _LIBCPP_HAS_NO_MONOTONIC_CLOCK)
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config_define_if_not(LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS)
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config_define_if(LIBCXX_HAS_MUSL_LIBC _LIBCPP_HAS_MUSL_LIBC)
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if (LIBCXX_NEEDS_SITE_CONFIG)
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configure_file(
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include/__config_site.in
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${LIBCXX_BINARY_DIR}/__config_site
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@ONLY)
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# Provide the config definitions by included the generated __config_site
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# file at compile time.
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add_compile_flags("-include ${LIBCXX_BINARY_DIR}/__config_site")
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endif()
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#===============================================================================
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# Setup Source Code And Tests
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#===============================================================================
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include_directories(include)
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add_subdirectory(include)
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add_subdirectory(lib)
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if (LIBCXX_INCLUDE_TESTS)
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add_subdirectory(test)
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endif()
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if (LIBCXX_INCLUDE_DOCS)
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add_subdirectory(docs)
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endif()
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