| # See www/CMake.html for instructions on how to build libcxx with CMake. |
| |
| #=============================================================================== |
| # Setup Project |
| #=============================================================================== |
| cmake_minimum_required(VERSION 3.4.3) |
| |
| if(POLICY CMP0042) |
| cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default |
| endif() |
| if(POLICY CMP0022) |
| cmake_policy(SET CMP0022 NEW) # Required when interacting with LLVM and Clang |
| endif() |
| |
| # Add path for custom modules |
| set(CMAKE_MODULE_PATH |
| "${CMAKE_CURRENT_SOURCE_DIR}/cmake" |
| "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" |
| ${CMAKE_MODULE_PATH} |
| ) |
| |
| |
| if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) |
| project(libcxx CXX C) |
| |
| set(PACKAGE_NAME libcxx) |
| set(PACKAGE_VERSION 4.0.0svn) |
| set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") |
| set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org") |
| |
| # Find the LLVM sources and simulate LLVM CMake options. |
| include(HandleOutOfTreeLLVM) |
| endif() |
| |
| if (LIBCXX_STANDALONE_BUILD) |
| include(FindPythonInterp) |
| if( NOT PYTHONINTERP_FOUND ) |
| message(WARNING "Failed to find python interpreter. " |
| "The libc++ test suite will be disabled.") |
| set(LLVM_INCLUDE_TESTS OFF) |
| endif() |
| endif() |
| |
| # Require out of source build. |
| include(MacroEnsureOutOfSourceBuild) |
| MACRO_ENSURE_OUT_OF_SOURCE_BUILD( |
| "${PROJECT_NAME} requires an out of source build. Please create a separate |
| build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there." |
| ) |
| |
| if (MSVC) |
| set(LIBCXX_TARGETING_MSVC ON) |
| else() |
| set(LIBCXX_TARGETING_MSVC OFF) |
| endif() |
| |
| #=============================================================================== |
| # Setup CMake Options |
| #=============================================================================== |
| include(CMakeDependentOption) |
| |
| # Basic options --------------------------------------------------------------- |
| option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." OFF) |
| option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON) |
| option(LIBCXX_ENABLE_STATIC "Build libc++ as a static library." ON) |
| option(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY "Build libc++experimental.a" ON) |
| option(LIBCXX_ENABLE_FILESYSTEM |
| "Build filesystem as part of libc++experimental.a" ${LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY}) |
| option(LIBCXX_INCLUDE_TESTS "Build the libc++ tests." ${LLVM_INCLUDE_TESTS}) |
| |
| # Benchmark options ----------------------------------------------------------- |
| option(LIBCXX_INCLUDE_BENCHMARKS "Build the libc++ benchmarks and their dependancies" ON) |
| set(LIBCXX_BENCHMARK_NATIVE_STDLIB "" CACHE STRING |
| "Build the benchmarks against the specified native STL. |
| The value must be one of libc++/libstdc++") |
| set(LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN "" CACHE STRING |
| "Use alternate GCC toolchain when building the native benchmarks") |
| |
| if (LIBCXX_BENCHMARK_NATIVE_STDLIB) |
| if (NOT (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++" |
| OR LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++")) |
| message(FATAL_ERROR "Invalid value for LIBCXX_BENCHMARK_NATIVE_STDLIB: " |
| "'${LIBCXX_BENCHMARK_NATIVE_STDLIB}'") |
| endif() |
| endif() |
| |
| option(LIBCXX_INCLUDE_DOCS "Build the libc++ documentation." ${LLVM_INCLUDE_DOCS}) |
| set(LIBCXX_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING |
| "Define suffix of library directory name (32/64)") |
| option(LIBCXX_INSTALL_HEADERS "Install the libc++ headers." ON) |
| option(LIBCXX_INSTALL_LIBRARY "Install the libc++ library." ON) |
| option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON) |
| cmake_dependent_option(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY |
| "Install libc++experimental.a" ON |
| "LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY;LIBCXX_INSTALL_LIBRARY" OFF) |
| set(LIBCXX_ABI_VERSION 1 CACHE STRING "ABI version of libc++.") |
| option(LIBCXX_ABI_UNSTABLE "Unstable ABI of libc++." OFF) |
| option(LIBCXX_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF) |
| |
| if (NOT LIBCXX_ENABLE_SHARED AND NOT LIBCXX_ENABLE_STATIC) |
| message(FATAL_ERROR "libc++ must be built as either a shared or static library.") |
| endif() |
| |
| # ABI Library options --------------------------------------------------------- |
| set(LIBCXX_CXX_ABI "default" CACHE STRING |
| "Specify C++ ABI library to use.") |
| set(CXXABIS none default libcxxabi libcxxrt libstdc++ libsupc++ vcruntime) |
| set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS}) |
| |
| # Setup the default options if LIBCXX_CXX_ABI is not specified. |
| if (LIBCXX_CXX_ABI STREQUAL "default") |
| find_path( |
| LIBCXX_LIBCXXABI_INCLUDES_INTERNAL |
| cxxabi.h |
| PATHS ${LLVM_MAIN_SRC_DIR}/projects/libcxxabi/include |
| ${LLVM_MAIN_SRC_DIR}/runtimes/libcxxabi/include |
| NO_DEFAULT_PATH |
| ) |
| if ((NOT LIBCXX_STANDALONE_BUILD OR HAVE_LIBCXXABI) AND |
| IS_DIRECTORY "${LIBCXX_LIBCXXABI_INCLUDES_INTERNAL}") |
| set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi") |
| set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${LIBCXX_LIBCXXABI_INCLUDES_INTERNAL}") |
| set(LIBCXX_CXX_ABI_INTREE 1) |
| else() |
| if (LIBCXX_TARGETING_MSVC) |
| # FIXME: Figure out how to configure the ABI library on Windows. |
| set(LIBCXX_CXX_ABI_LIBNAME "vcruntime") |
| else() |
| set(LIBCXX_CXX_ABI_LIBNAME "default") |
| endif() |
| endif() |
| else() |
| set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}") |
| endif() |
| |
| # Use a static copy of the ABI library when linking libc++. This option |
| # cannot be used with LIBCXX_ENABLE_ABI_LINKER_SCRIPT. |
| option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY "Statically link the ABI library" OFF) |
| |
| # Generate and install a linker script inplace of libc++.so. The linker script |
| # will link libc++ to the correct ABI library. This option is on by default |
| # On UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY' |
| # is on. This option is also disabled when the ABI library is not specified |
| # or is specified to be "none". |
| set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF) |
| if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_ENABLE_STATIC_ABI_LIBRARY |
| AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "none" |
| AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "default" |
| AND PYTHONINTERP_FOUND |
| AND LIBCXX_ENABLE_SHARED) |
| set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON) |
| endif() |
| |
| option(LIBCXX_ENABLE_ABI_LINKER_SCRIPT |
| "Use and install a linker script for the given ABI library" |
| ${ENABLE_LINKER_SCRIPT_DEFAULT_VALUE}) |
| |
| # Build libc++abi with libunwind. We need this option to determine whether to |
| # link with libunwind or libgcc_s while running the test cases. |
| option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF) |
| |
| # Target options -------------------------------------------------------------- |
| option(LIBCXX_BUILD_32_BITS "Build 32 bit libc++." ${LLVM_BUILD_32_BITS}) |
| set(LIBCXX_SYSROOT "" CACHE STRING "Use alternate sysroot.") |
| set(LIBCXX_GCC_TOOLCHAIN "" CACHE STRING "Use alternate GCC toolchain.") |
| |
| # Feature options ------------------------------------------------------------- |
| option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON) |
| option(LIBCXX_ENABLE_RTTI "Use run time type information." ON) |
| option(LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE "Build libc++ with support for the global filesystem namespace." ON) |
| option(LIBCXX_ENABLE_STDIN "Build libc++ with support for stdin/std::cin." ON) |
| option(LIBCXX_ENABLE_STDOUT "Build libc++ with support for stdout/std::cout." ON) |
| option(LIBCXX_ENABLE_THREADS "Build libc++ with support for threads." ON) |
| option(LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS "Build libc++ with support for thread-unsafe C functions" ON) |
| option(LIBCXX_ENABLE_MONOTONIC_CLOCK |
| "Build libc++ with support for a monotonic clock. |
| This option may only be set to OFF when LIBCXX_ENABLE_THREADS=OFF." ON) |
| option(LIBCXX_HAS_MUSL_LIBC "Build libc++ with support for the Musl C library" OFF) |
| option(LIBCXX_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF) |
| option(LIBCXX_HAS_EXTERNAL_THREAD_API |
| "Build libc++ with an externalized threading API. |
| This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON." OFF) |
| option(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY |
| "Build libc++ with an externalized threading library. |
| This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON" OFF) |
| |
| # Misc options ---------------------------------------------------------------- |
| # FIXME: Turn -pedantic back ON. It is currently off because it warns |
| # about #include_next which is used everywhere. |
| option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF) |
| option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) |
| option(LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS "Disable #warnings about conflicting macros." OFF) |
| |
| option(LIBCXX_GENERATE_COVERAGE "Enable generating code coverage." OFF) |
| set(LIBCXX_COVERAGE_LIBRARY "" CACHE STRING |
| "The Profile-rt library used to build with code coverage") |
| |
| # Don't allow a user to accidentally overwrite the system libc++ installation on Darwin. |
| # If the user specifies -DCMAKE_INSTALL_PREFIX=/usr the install rules for libc++ |
| # will not be generated and a warning will be issued. |
| option(LIBCXX_OVERRIDE_DARWIN_INSTALL "Enable overwriting darwins libc++ installation." OFF) |
| mark_as_advanced(LIBCXX_OVERRIDE_DARWIN_INSTALL) # Don't show this option by default. |
| |
| if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND NOT LIBCXX_OVERRIDE_DARWIN_INSTALL) |
| if ("${CMAKE_INSTALL_PREFIX}" STREQUAL "/usr") |
| message(WARNING "Disabling libc++ install rules because installation would " |
| "overwrite the systems installation. Configure with " |
| "-DLIBCXX_OVERRIDE_DARWIN_INSTALL=ON to suppress this behaviour.") |
| mark_as_advanced(CLEAR LIBCXX_OVERRIDE_DARWIN_INSTALL) # Show the override option. |
| set(LIBCXX_INSTALL_HEADERS OFF) |
| set(LIBCXX_INSTALL_LIBRARY OFF) |
| endif() |
| endif() |
| |
| set(LIBCXX_CONFIGURE_IDE_DEFAULT OFF) |
| if (XCODE OR MSVC_IDE) |
| set(LIBCXX_CONFIGURE_IDE_DEFAULT ON) |
| endif() |
| option(LIBCXX_CONFIGURE_IDE "Configure libcxx for use within an IDE" |
| ${LIBCXX_CONFIGURE_IDE_DEFAULT}) |
| |
| #=============================================================================== |
| # Check option configurations |
| #=============================================================================== |
| |
| if (LIBCXX_ENABLE_FILESYSTEM AND NOT LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY) |
| message(FATAL_ERROR |
| "LIBCXX_ENABLE_FILESYSTEM cannot be turned on when LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF") |
| endif() |
| |
| # Ensure LIBCXX_ENABLE_MONOTONIC_CLOCK is set to ON only when |
| # LIBCXX_ENABLE_THREADS is on. |
| if(LIBCXX_ENABLE_THREADS AND NOT LIBCXX_ENABLE_MONOTONIC_CLOCK) |
| message(FATAL_ERROR "LIBCXX_ENABLE_MONOTONIC_CLOCK can only be set to OFF" |
| " when LIBCXX_ENABLE_THREADS is also set to OFF.") |
| endif() |
| |
| if(NOT LIBCXX_ENABLE_THREADS) |
| if(LIBCXX_HAS_PTHREAD_API) |
| message(FATAL_ERROR "LIBCXX_HAS_PTHREAD_API can only be set to ON" |
| " when LIBCXX_ENABLE_THREADS is also set to ON.") |
| endif() |
| if(LIBCXX_HAS_EXTERNAL_THREAD_API) |
| message(FATAL_ERROR "LIBCXX_HAS_EXTERNAL_THREAD_API can only be set to ON" |
| " when LIBCXX_ENABLE_THREADS is also set to ON.") |
| endif() |
| if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY) |
| message(FATAL_ERROR "LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY can only be set " |
| "to ON when LIBCXX_ENABLE_THREADS is also set to ON.") |
| endif() |
| |
| endif() |
| |
| if (LIBCXX_HAS_EXTERNAL_THREAD_API) |
| if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY) |
| message(FATAL_ERROR "The options LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY and " |
| "LIBCXX_HAS_EXTERNAL_THREAD_API cannot both be ON at " |
| "the same time") |
| endif() |
| if (LIBCXX_HAS_PTHREAD_API) |
| message(FATAL_ERROR "The options LIBCXX_HAS_EXTERNAL_THREAD_API" |
| "and LIBCXX_HAS_PTHREAD_API cannot be both" |
| "set to ON at the same time.") |
| endif() |
| endif() |
| |
| # Ensure LLVM_USE_SANITIZER is not specified when LIBCXX_GENERATE_COVERAGE |
| # is ON. |
| if (LLVM_USE_SANITIZER AND LIBCXX_GENERATE_COVERAGE) |
| message(FATAL_ERROR "LLVM_USE_SANITIZER cannot be used with LIBCXX_GENERATE_COVERAGE") |
| endif() |
| |
| # Set LIBCXX_BUILD_32_BITS to (LIBCXX_BUILD_32_BITS OR LLVM_BUILD_32_BITS) |
| # and check that we can build with 32 bits if requested. |
| if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32) |
| if (LIBCXX_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM |
| message(STATUS "Building 32 bits executables and libraries.") |
| endif() |
| elseif(LIBCXX_BUILD_32_BITS) |
| message(FATAL_ERROR "LIBCXX_BUILD_32_BITS=ON is not supported on this platform.") |
| endif() |
| |
| # Check that this option is not enabled on Apple and emit a usage warning. |
| if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY) |
| if (APPLE) |
| message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is not supported on OS X") |
| else() |
| message(WARNING "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is an experimental option") |
| endif() |
| if (LIBCXX_ENABLE_STATIC AND NOT PYTHONINTERP_FOUND) |
| message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY requires python but it was not found.") |
| endif() |
| endif() |
| |
| if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT) |
| if (APPLE) |
| message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT cannot be used on APPLE targets") |
| endif() |
| if (NOT PYTHONINTERP_FOUND) |
| message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT requires python but it was not found.") |
| 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_ENABLE_STATIC_ABI_LIBRARY AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT) |
| message(FATAL_ERROR "Conflicting options given. |
| LIBCXX_ENABLE_STATIC_ABI_LIBRARY cannot be specified with |
| LIBCXX_ENABLE_ABI_LINKER_SCRIPT") |
| endif() |
| |
| if (LIBCXX_HAS_MUSL_LIBC AND NOT LIBCXX_INSTALL_SUPPORT_HEADERS) |
| message(FATAL_ERROR "LIBCXX_INSTALL_SUPPORT_HEADERS can not be turned off" |
| "when building for Musl with LIBCXX_HAS_MUSL_LIBC.") |
| endif() |
| |
| #=============================================================================== |
| # Configure System |
| #=============================================================================== |
| |
| set(LIBCXX_COMPILER ${CMAKE_CXX_COMPILER}) |
| 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") |
| set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX}) |
| file(MAKE_DIRECTORY "${LIBCXX_BINARY_INCLUDE_DIR}") |
| |
| set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR}) |
| set(CMAKE_LIBRARY_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. |
| # LIBCXX_INTERFACE_LIBRARIES: Libraries that must be linked when using libc++ |
| # These libraries are exposed in the linker script. |
| set(LIBCXX_COMPILE_FLAGS "") |
| set(LIBCXX_LINK_FLAGS "") |
| set(LIBCXX_LIBRARIES "") |
| set(LIBCXX_INTERFACE_LIBRARIES "") |
| |
| # Include macros for adding and removing libc++ flags. |
| include(HandleLibcxxFlags) |
| |
| # Target flags ================================================================ |
| # These flags get added to CMAKE_CXX_FLAGS and CMAKE_C_FLAGS so that |
| # 'config-ix' use them during feature checks. It also adds them to both |
| # 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS' |
| add_target_flags_if(LIBCXX_BUILD_32_BITS "-m32") |
| add_target_flags_if(LIBCXX_TARGET_TRIPLE "-target ${LIBCXX_TARGET_TRIPLE}") |
| add_target_flags_if(LIBCXX_SYSROOT "--sysroot=${LIBCXX_SYSROOT}") |
| add_target_flags_if(LIBCXX_GCC_TOOLCHAIN "-gcc-toolchain ${LIBCXX_GCC_TOOLCHAIN}") |
| if (LIBCXX_TARGET_TRIPLE) |
| set(TARGET_TRIPLE "${LIBCXX_TARGET_TRIPLE}") |
| endif() |
| |
| # Configure compiler. |
| include(config-ix) |
| |
| if (LIBCXX_USE_COMPILER_RT) |
| list(APPEND LIBCXX_LINK_FLAGS "-rtlib=compiler-rt") |
| endif() |
| |
| # Configure coverage options. |
| if (LIBCXX_GENERATE_COVERAGE) |
| include(CodeCoverage) |
| set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE) |
| endif() |
| |
| string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) |
| if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG") |
| set(LIBCXX_DEBUG_BUILD ON) |
| else() |
| set(LIBCXX_DEBUG_BUILD OFF) |
| endif() |
| |
| #=============================================================================== |
| # Setup Compiler Flags |
| #=============================================================================== |
| |
| include(HandleLibCXXABI) # Setup the ABI library flags |
| |
| if (NOT LIBCXX_STANDALONE_BUILD) |
| # Remove flags that may have snuck in. |
| remove_flags(-DNDEBUG -UNDEBUG -D_DEBUG |
| -lc++abi) |
| endif() |
| remove_flags(-stdlib=libc++ -stdlib=libstdc++) |
| |
| # FIXME: Remove all debug flags and flags that change which Windows |
| # default libraries are linked. Currently we only support linking the |
| # non-debug DLLs |
| remove_flags("/D_DEBUG" "/MTd" "/MDd" "/MT" "/Md") |
| |
| # FIXME(EricWF): See the FIXME on LIBCXX_ENABLE_PEqDANTIC. |
| # Remove the -pedantic flag and -Wno-pedantic and -pedantic-errors |
| # so they don't get transformed into -Wno and -errors respectivly. |
| remove_flags(-Wno-pedantic -pedantic-errors -pedantic) |
| |
| # Required flags ============================================================== |
| set(LIBCXX_STANDARD_VER c++11 CACHE INTERNAL "internal option to change build dialect") |
| if (LIBCXX_HAS_MUSL_LIBC) |
| # musl's pthread implementations uses volatile types in their structs which is |
| # not a constexpr in C++11 but is in C++14, so we use C++14 with musl. |
| set(LIBCXX_STANDARD_VER c++14 CACHE INTERNAL "internal option to change build dialect") |
| endif() |
| add_compile_flags_if_supported(-std=${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 ${LIBCXX_STANDARD_VER}") |
| endif() |
| endif() |
| |
| # On all systems the system c++ standard library headers need to be excluded. |
| # MSVC only has -X, which disables all default includes; including the crt. |
| # Thus, we do nothing and hope we don't accidentally include any of the C++ |
| # headers |
| add_compile_flags_if_supported(-nostdinc++) |
| |
| # Hide all inline function definitions which have not explicitly been marked |
| # visible. This prevents new definitions for inline functions from appearing in |
| # the dylib when get ODR used by another function. |
| add_compile_flags_if_supported(-fvisibility-inlines-hidden) |
| |
| # Let the library headers know they are currently being used to build the |
| # library. |
| add_definitions(-D_LIBCPP_BUILDING_LIBRARY) |
| |
| # Warning flags =============================================================== |
| add_definitions(-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| add_compile_flags_if_supported( |
| -Wall -Wextra -W -Wwrite-strings |
| -Wno-unused-parameter -Wno-long-long |
| -Werror=return-type) |
| if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") |
| add_compile_flags_if_supported( |
| -Wno-user-defined-literals |
| -Wno-covered-switch-default) |
| elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") |
| add_compile_flags_if_supported( |
| -Wno-literal-suffix |
| -Wno-c++14-compat) |
| endif() |
| if (LIBCXX_ENABLE_WERROR) |
| add_compile_flags_if_supported(-Werror) |
| add_compile_flags_if_supported(-WX) |
| else() |
| # TODO(EricWF) Remove this. We shouldn't be suppressing errors when -Werror is |
| # added elsewhere. |
| add_compile_flags_if_supported(-Wno-error) |
| endif() |
| if (LIBCXX_ENABLE_PEDANTIC) |
| add_compile_flags_if_supported(-pedantic) |
| endif() |
| if (LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS) |
| add_definitions(-D_LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS) |
| endif() |
| |
| # Exception flags ============================================================= |
| if (LIBCXX_ENABLE_EXCEPTIONS) |
| # Catches C++ exceptions only and tells the compiler to assume that extern C |
| # functions never throw a C++ exception. |
| add_compile_flags_if_supported(-EHsc) |
| else() |
| add_definitions(-D_LIBCPP_NO_EXCEPTIONS) |
| add_compile_flags_if_supported(-EHs- -EHa-) |
| add_compile_flags_if_supported(-fno-exceptions) |
| endif() |
| |
| # RTTI flags ================================================================== |
| if (NOT LIBCXX_ENABLE_RTTI) |
| add_definitions(-D_LIBCPP_NO_RTTI) |
| add_compile_flags_if_supported(-GR-) |
| add_compile_flags_if_supported(-fno-rtti) |
| endif() |
| |
| # Threading flags ============================================================= |
| if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXX_ENABLE_SHARED) |
| # Need to allow unresolved symbols if this is to work with shared library builds |
| if (APPLE) |
| add_link_flags("-undefined dynamic_lookup") |
| else() |
| # Relax this restriction from HandleLLVMOptions |
| string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${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() |
| if (LIBCXX_INCLUDE_TESTS) |
| add_subdirectory(test) |
| add_subdirectory(lib/abi) |
| endif() |
| if (LIBCXX_INCLUDE_DOCS) |
| add_subdirectory(docs) |
| endif() |