forked from OSchip/llvm-project
332 lines
13 KiB
CMake
332 lines
13 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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project(libcxx CXX C)
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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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set(PACKAGE_NAME libcxx)
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set(PACKAGE_VERSION trunk-svn)
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set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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set(PACKAGE_BUGREPORT "llvmbugs@cs.uiuc.edu")
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# Add path for custom modules
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set(CMAKE_MODULE_PATH
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"${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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# 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(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
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set(LIBCXX_LIBDIR_SUFFIX "" CACHE STRING
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"Define suffix of library directory name (32/64)")
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set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
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set(LIBCXX_BUILT_STANDALONE 1)
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else()
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set(LIBCXX_LIBDIR_SUFFIX ${LLVM_LIBDIR_SUFFIX})
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endif()
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#===============================================================================
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# Setup CMake Options
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#===============================================================================
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# Define 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_ASSERTIONS "Enable assertions independent of build mode." ON)
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option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
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option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
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option(LIBCXX_ENABLE_CXX1Y "Enable -std=c++1y and use of c++1y language features if the compiler supports it." OFF)
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option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." 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_THREADS "Build libc++ with support for threads." ON)
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option(LIBCXX_BUILD_32_BITS "Build 32 bit libc++" OFF)
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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 used when LIBCXX_ENABLE_THREADS=OFF." ON)
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option(LIBCXX_INSTALL_HEADERS "Install the libc++ headers." ON)
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option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON)
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option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY "Statically link the ABI library" OFF)
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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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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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endif()
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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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set(CXXABIS none libcxxabi libcxxrt libstdc++ libsupc++)
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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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set(LIBCXX_CXX_ABI "${LIBCXX_CXX_ABI}" CACHE STRING
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"Specify C++ ABI library to use." FORCE)
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set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS})
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# TODO(ericwf): Remove these options by March/25/2015.
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# These CMake options have been removed in favor of a generic option
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# "LIBCXX_CXX_ABI_INCLUDE_PATHS". Issue an explicit error message explaining
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# the change for anybody that still uses them.
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if (DEFINED LIBCXX_LIBCXXABI_INCLUDE_PATHS)
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message(FATAL_ERROR
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"The option \"LIBCXX_LIBCXXABI_INCLUDE_PATHS\" has been removed. "
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"Use \"LIBCXX_CXX_ABI_INCLUDE_PATHS\" instead "
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"and clean your build directory.")
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elseif(DEFINED LIBCXX_LIBSUPCXX_INCLUDE_PATHS)
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message(FATAL_ERROR
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"The option \"LIBCXX_LIBSUPCXX_INCLUDE_PATHS\" has been removed. "
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"Use \"LIBCXX_CXX_ABI_INCLUDE_PATHS\" instead "
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"and clean your build directory.")
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elseif(DEFINED LIBCXX_LIBCXXRT_INCLUDE_PATHS)
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message(FATAL_ERROR
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"The option \"LIBCXX_LIBCXXRT_INCLUDE_PATHS\" has been removed. "
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"Use \"LIBCXX_CXX_ABI_INCLUDE_PATHS\" instead "
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"and clean your build directory.")
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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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# 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_CXX_FLAGS "")
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set(LIBCXX_COMPILE_FLAGS "")
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set(LIBCXX_LINK_FLAGS "")
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# Configure compiler.
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include(config-ix)
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# Configure ABI library
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include(HandleLibCXXABI)
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#===============================================================================
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# Setup Compiler Flags
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#===============================================================================
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# Get required flags.
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# On all systems the system c++ standard library headers need to be excluded.
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if (MSVC)
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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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else()
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if (LIBCXX_HAS_NOSTDINCXX_FLAG)
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list(APPEND LIBCXX_COMPILE_FLAGS -nostdinc++)
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string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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endif()
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# If c++1y has been enabled then attempt to use it. Fail if it is no supported
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# by the compiler. Otherwise choose c++11 and ensure the compiler supports it.
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if (LIBCXX_ENABLE_CXX1Y)
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if (LIBCXX_HAS_STDCXX1Y_FLAG)
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set(LIBCXX_STD_VERSION c++1y)
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else()
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message(FATAL_ERROR "c++1y was enabled but the compiler does not support it.")
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endif()
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else()
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if (LIBCXX_HAS_STDCXX11_FLAG)
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set(LIBCXX_STD_VERSION c++11)
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else()
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message(FATAL_ERROR "c++11 is required by libc++ but is not supported by the compiler")
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endif()
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endif()
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# LIBCXX_STD_VERSION should always be set at this point.
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list(APPEND LIBCXX_CXX_FLAGS "-std=${LIBCXX_STD_VERSION}")
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endif()
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macro(append_if list condition var)
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if (${condition})
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list(APPEND ${list} ${var})
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endif()
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endmacro()
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# Get warning flags
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if (NOT MSVC)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WALL_FLAG -Wall)
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list(APPEND LIBCXX_COMPILE_FLAGS -Werror=return-type)
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endif()
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_W_FLAG -W)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WNO_LONG_LONG_FLAG -Wno-long-long)
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if (LIBCXX_ENABLE_WERROR)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WX_FLAG -WX)
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else()
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_WNO_ERROR_FLAG -Wno-error)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_NO_WX_FLAG -WX-)
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endif()
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if (LIBCXX_ENABLE_PEDANTIC)
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append_if(LIBCXX_COMPILE_FLAGS LIBCXX_HAS_PEDANTIC_FLAG -pedantic)
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endif()
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# Get feature flags.
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# Exceptions
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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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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_EHSC_FLAG -EHsc)
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else()
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list(APPEND LIBCXX_CXX_FLAGS -D_LIBCPP_NO_EXCEPTIONS)
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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_NO_EHS_FLAG -EHs-)
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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_NO_EHA_FLAG -EHa-)
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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions)
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endif()
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# RTTI
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if (NOT LIBCXX_ENABLE_RTTI)
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list(APPEND LIBCXX_CXX_FLAGS -D_LIBCPP_NO_RTTI)
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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_NO_GR_FLAG -GR-)
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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_FNO_RTTI_FLAG -fno-rtti)
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endif()
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# Assert
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string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
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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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if (NOT MSVC)
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list(APPEND LIBCXX_COMPILE_FLAGS -D_DEBUG)
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endif()
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# On Release builds cmake automatically defines NDEBUG, so we
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# explicitly undefine it:
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if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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list(APPEND LIBCXX_COMPILE_FLAGS -UNDEBUG)
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endif()
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else()
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if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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list(APPEND LIBCXX_COMPILE_FLAGS -DNDEBUG)
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endif()
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endif()
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# Static library
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if (NOT LIBCXX_ENABLE_SHARED)
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list(APPEND LIBCXX_COMPILE_FLAGS -D_LIBCPP_BUILD_STATIC)
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endif()
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if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
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if (LIBCXX_BUILD_32_BITS)
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message(STATUS "Building 32 bits executables and libraries.")
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list(APPEND LIBCXX_CXX_FLAGS "-m32")
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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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# This is the _ONLY_ place where add_definitions is called.
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if (MSVC)
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add_definitions(-D_CRT_SECURE_NO_WARNINGS)
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endif()
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# LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE configuration
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if (NOT LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE)
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add_definitions(-D_LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE)
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endif()
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# LIBCXX_ENABLE_THREADS configuration
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if (NOT LIBCXX_ENABLE_THREADS)
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add_definitions(-D_LIBCPP_HAS_NO_THREADS)
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if (NOT LIBCXX_ENABLE_MONOTONIC_CLOCK)
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add_definitions(-D_LIBCPP_HAS_NO_MONOTONIC_CLOCK)
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endif()
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# Ensure LIBCXX_ENABLE_MONOTONIC_CLOCK is set to ON.
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elseif(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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# 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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# 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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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_FNO_OMIT_FRAME_POINTER_FLAG
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"-fno-omit-frame-pointer")
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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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append_if(LIBCXX_CXX_FLAGS LIBCXX_HAS_GLINE_TABLES_ONLY_FLAG
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"-gline-tables-only")
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endif()
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if (LLVM_USE_SANITIZER STREQUAL "Address")
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list(APPEND LIBCXX_CXX_FLAGS "-fsanitize=address")
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elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
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list(APPEND LIBCXX_CXX_FLAGS "-fsanitize=memory")
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if (LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
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list(APPEND LIBCXX_CXX_FLAGS "-fsanitize-memory-track-origins")
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endif()
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elseif (LLVM_USE_SANITIZER STREQUAL "Undefined")
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list(APPEND LIBCXX_CXX_FLAGS
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"-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover")
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elseif (LLVM_USE_SANITIZER STREQUAL "Thread")
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list(APPEND LIBCXX_CXX_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(MSVC)
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message(WARNING "LLVM_USE_SANITIZER is not supported with MSVC")
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endif()
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endif()
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append_if(LIBCXX_CXX_FLAGS LIBCXX_TARGET_TRIPLE
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"-target ${LIBCXX_TARGET_TRIPLE}")
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append_if(LIBCXX_CXX_FLAGS LIBCXX_SYSROOT "--sysroot ${LIBCXX_SYSROOT}")
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append_if(LIBCXX_CXX_FLAGS LIBCXX_GCC_TOOLCHAIN
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"-gcc-toolchain ${LIBCXX_GCC_TOOLCHAIN}")
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string(REPLACE ";" " " LIBCXX_CXX_FLAGS "${LIBCXX_CXX_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_FLAGS}")
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#===============================================================================
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# Setup Source Code
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#===============================================================================
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include_directories(include)
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add_subdirectory(include)
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# Add source code. This also contains all of the logic for deciding linker flags
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# soname, etc...
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add_subdirectory(lib)
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#===============================================================================
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# Setup Tests
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#===============================================================================
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add_subdirectory(test)
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