# See www/CMake.html for instructions on how to build libcxx with CMake. #=============================================================================== # Setup Project #=============================================================================== project(libcxx CXX C) cmake_minimum_required(VERSION 2.8) if(POLICY CMP0042) cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default endif() set(PACKAGE_NAME libcxx) set(PACKAGE_VERSION trunk-svn) set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}") set(PACKAGE_BUGREPORT "llvmbugs@cs.uiuc.edu") # Add path for custom modules set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" ${CMAKE_MODULE_PATH} ) # Require out of source build. include(MacroEnsureOutOfSourceBuild) MACRO_ENSURE_OUT_OF_SOURCE_BUILD( "${PROJECT_NAME} requires an out of source build. Please create a separate build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there." ) if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) set(LIBCXX_LIBDIR_SUFFIX "" CACHE STRING "Define suffix of library directory name (32/64)") set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX}) set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX}) set(LIBCXX_BUILT_STANDALONE 1) else() set(LIBCXX_LIBDIR_SUFFIX ${LLVM_LIBDIR_SUFFIX}) endif() #=============================================================================== # Setup CMake Options #=============================================================================== # Define options. option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON) option(LIBCXX_ENABLE_RTTI "Use run time type information." ON) option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON) option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." ON) option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF) option(LIBCXX_ENABLE_CXX1Y "Enable -std=c++1y and use of c++1y language features if the compiler supports it." OFF) option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." 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_BUILD_32_BITS "Build 32 bit libc++" OFF) option(LIBCXX_ENABLE_MONOTONIC_CLOCK "Build libc++ with support for a monotonic clock. This option may only be used when LIBCXX_ENABLE_THREADS=OFF." ON) option(LIBCXX_INSTALL_HEADERS "Install the libc++ headers." ON) option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON) 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") option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY "Statically link the ABI library" OFF) set(LIBCXX_SYSROOT "" CACHE STRING "Use alternate sysroot.") set(LIBCXX_GCC_TOOLCHAIN "" CACHE STRING "Use alternate GCC toolchain.") if (LIBCXX_BUILT_STANDALONE) set(LLVM_USE_SANITIZER "" CACHE STRING "Define the sanitizer used to build the library and tests") endif() 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() endif() set(CXXABIS none libcxxabi libcxxrt libstdc++ libsupc++) if (NOT LIBCXX_CXX_ABI) if (NOT DEFINED LIBCXX_BUILT_STANDALONE AND IS_DIRECTORY "${CMAKE_SOURCE_DIR}/projects/libcxxabi") set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi") set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${CMAKE_SOURCE_DIR}/projects/libcxxabi/include") set(LIBCXX_CXX_ABI_INTREE 1) else () set(LIBCXX_CXX_ABI_LIBNAME "none") endif () else () set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}") endif () set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING "Specify C++ ABI library to use." FORCE) set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS}) # 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) #=============================================================================== # 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_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX}) # 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. set(LIBCXX_CXX_FLAGS "") set(LIBCXX_COMPILE_FLAGS "") set(LIBCXX_LINK_FLAGS "") # Configure compiler. include(config-ix) # Configure ABI library include(HandleLibCXXABI) # Configure coverage options. if (LIBCXX_GENERATE_COVERAGE) include(CodeCoverage) set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE) endif() #=============================================================================== # Setup Compiler Flags #=============================================================================== # Get required flags. # On all systems the system c++ standard library headers need to be excluded. if (MSVC) # 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. else() if (LIBCXX_HAS_NOSTDINCXX_FLAG) list(APPEND LIBCXX_COMPILE_FLAGS -nostdinc++) string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") endif() # If c++1y has been enabled then attempt to use it. Fail if it is no supported # by the compiler. Otherwise choose c++11 and ensure the compiler supports it. if (LIBCXX_ENABLE_CXX1Y) if (LIBCXX_HAS_STDCXX1Y_FLAG) set(LIBCXX_STD_VERSION c++1y) else() message(FATAL_ERROR "c++1y was enabled but the compiler does not support it.") endif() else() if (LIBCXX_HAS_STDCXX11_FLAG) set(LIBCXX_STD_VERSION c++11) else() message(FATAL_ERROR "c++11 is required by libc++ but is not supported by the compiler") endif() endif() # LIBCXX_STD_VERSION should always be set at this point. list(APPEND LIBCXX_CXX_FLAGS "-std=${LIBCXX_STD_VERSION}") endif() macro(append_if list condition var) if (${condition}) list(APPEND ${list} ${var}) endif() endmacro() # Get warning flags # Disable the system header pragma. add_definitions(-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) if (NOT MSVC) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WALL_FLAG -Wall) list(APPEND LIBCXX_COMPILE_FLAGS -Werror=return-type) endif() append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_W_FLAG -W) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WNO_LONG_LONG_FLAG -Wno-long-long) if (LIBCXX_ENABLE_WERROR) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WX_FLAG -WX) else() append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WNO_ERROR_FLAG -Wno-error) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_NO_WX_FLAG -WX-) endif() if (LIBCXX_ENABLE_PEDANTIC) append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_PEDANTIC_FLAG -pedantic) endif() # Get feature flags. # Exceptions if (LIBCXX_ENABLE_EXCEPTIONS) # Catches C++ exceptions only and tells the compiler to assume that extern C # functions never throw a C++ exception. append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_EHSC_FLAG -EHsc) else() list(APPEND LIBCXX_CXX_FLAGS -D_LIBCPP_NO_EXCEPTIONS) append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_NO_EHS_FLAG -EHs-) append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_NO_EHA_FLAG -EHa-) append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions) endif() # RTTI if (NOT LIBCXX_ENABLE_RTTI) list(APPEND LIBCXX_CXX_FLAGS -D_LIBCPP_NO_RTTI) append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_NO_GR_FLAG -GR-) append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_FNO_RTTI_FLAG -fno-rtti) endif() # Assert string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) if (LIBCXX_ENABLE_ASSERTIONS) # MSVC doesn't like _DEBUG on release builds. See PR 4379. if (NOT MSVC) list(APPEND LIBCXX_COMPILE_FLAGS -D_DEBUG) endif() # On Release builds cmake automatically defines NDEBUG, so we # explicitly undefine it: if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") list(APPEND LIBCXX_COMPILE_FLAGS -UNDEBUG) endif() else() if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") list(APPEND LIBCXX_COMPILE_FLAGS -DNDEBUG) endif() endif() # Static library if (NOT LIBCXX_ENABLE_SHARED) list(APPEND LIBCXX_COMPILE_FLAGS -D_LIBCPP_BUILD_STATIC) endif() if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32) if (LIBCXX_BUILD_32_BITS) message(STATUS "Building 32 bits executables and libraries.") list(APPEND LIBCXX_CXX_FLAGS "-m32") endif() elseif(LIBCXX_BUILD_32_BITS) message(FATAL_ERROR "LIBCXX_BUILD_32_BITS=ON is not supported on this platform.") endif() # This is the _ONLY_ place where add_definitions is called. if (MSVC) add_definitions(-D_CRT_SECURE_NO_WARNINGS) endif() # LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE configuration if (NOT LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE) add_definitions(-D_LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE) endif() # LIBCXX_ENABLE_STDIN configuration if (NOT LIBCXX_ENABLE_STDIN) add_definitions(-D_LIBCPP_HAS_NO_STDIN) endif() # LIBCXX_ENABLE_STDOUT configuration if (NOT LIBCXX_ENABLE_STDOUT) add_definitions(-D_LIBCPP_HAS_NO_STDOUT) endif() # LIBCXX_ENABLE_THREADS configuration if (NOT LIBCXX_ENABLE_THREADS) add_definitions(-D_LIBCPP_HAS_NO_THREADS) if (NOT LIBCXX_ENABLE_MONOTONIC_CLOCK) add_definitions(-D_LIBCPP_HAS_NO_MONOTONIC_CLOCK) endif() # Ensure LIBCXX_ENABLE_MONOTONIC_CLOCK is set to ON. elseif(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() # LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS configuration if (NOT LIBCXX_ENABLE_THREAD_UNSAFE_C_FUNCTIONS) add_definitions(-D_LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS) endif() # Configure for sanitizers. If LIBCXX_BUILT_STANDALONE then we have to do # the flag translation ourselves. Othewise LLVM's CMakeList.txt will handle it. if (LIBCXX_BUILT_STANDALONE) # 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) append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_FNO_OMIT_FRAME_POINTER_FLAG "-fno-omit-frame-pointer") if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO") append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_GLINE_TABLES_ONLY_FLAG "-gline-tables-only") endif() if (LLVM_USE_SANITIZER STREQUAL "Address") list(APPEND LIBCXX_CXX_FLAGS "-fsanitize=address") elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?") list(APPEND LIBCXX_CXX_FLAGS "-fsanitize=memory") if (LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins") list(APPEND LIBCXX_CXX_FLAGS "-fsanitize-memory-track-origins") endif() elseif (LLVM_USE_SANITIZER STREQUAL "Undefined") list(APPEND LIBCXX_CXX_FLAGS "-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover") elseif (LLVM_USE_SANITIZER STREQUAL "Thread") list(APPEND LIBCXX_CXX_FLAGS "-fsanitize=thread") else() message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}") endif() elseif(MSVC) message(WARNING "LLVM_USE_SANITIZER is not supported with MSVC") endif() endif() append_if(LIBCXX_CXX_FLAGS LIBCXX_TARGET_TRIPLE "-target ${LIBCXX_TARGET_TRIPLE}") append_if(LIBCXX_CXX_FLAGS LIBCXX_SYSROOT "--sysroot ${LIBCXX_SYSROOT}") append_if(LIBCXX_CXX_FLAGS LIBCXX_GCC_TOOLCHAIN "-gcc-toolchain ${LIBCXX_GCC_TOOLCHAIN}") if (LLVM_USE_SANITIZER AND LIBCXX_GENERATE_COVERAGE) message(FATAL_ERROR "LLVM_USE_SANITIZER cannot be used with LIBCXX_GENERATE_COVERAGE") endif() string(REPLACE ";" " " LIBCXX_CXX_FLAGS "${LIBCXX_CXX_FLAGS}") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_FLAGS}") #=============================================================================== # Setup Source Code #=============================================================================== include_directories(include) add_subdirectory(include) # Add source code. This also contains all of the logic for deciding linker flags # soname, etc... add_subdirectory(lib) #=============================================================================== # Setup Tests #=============================================================================== add_subdirectory(test)