forked from OSchip/llvm-project
221 lines
7.8 KiB
CMake
221 lines
7.8 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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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_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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)
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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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# 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_CXX0X "Enable -std=c++0x and use of c++0x language features if the compiler supports it." ON)
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option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
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set(CXXABIS none libcxxabi libcxxrt libsupc++)
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if (NOT DEFINED LIBCXX_CXX_ABI)
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set(LIBCXX_CXX_ABI "none")
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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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#===============================================================================
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# Configure System
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#===============================================================================
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# Get triples.
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include(GetTriple)
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get_host_triple(LIBCXX_HOST_TRIPLE
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LIBCXX_HOST_ARCH
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LIBCXX_HOST_VENDOR
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LIBCXX_HOST_OS
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)
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set(LIBCXX_HOST_TRIPLE ${LIBCXX_HOST_TRIPLE} CACHE STRING "Host triple.")
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get_target_triple(LIBCXX_TARGET_TRIPLE
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LIBCXX_TARGET_ARCH
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LIBCXX_TARGET_VENDOR
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LIBCXX_TARGET_OS
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)
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set(LIBCXX_TARGET_TRIPLE ${LIBCXX_TARGET_TRIPLE} CACHE STRING "Target triple.")
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if ("${LIBCXX_CXX_ABI}" STREQUAL "libsupc++")
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set(LIBCXX_LIBSUPCXX_INCLUDE_PATHS "${LIBCXX_LIBSUPCXX_INCLUDE_PATHS}"
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CACHE STRINGS
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"Paths to libsupc++ include directories separate by ';'.")
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set(LIBCXX_CXX_ABI_LIBRARIES stdc++)
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set(LIBCXX_LIBSUPCXX_FILES
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cxxabi.h
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bits/c++config.h
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bits/os_defines.h
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bits/cpu_defines.h
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bits/cxxabi_tweaks.h
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bits/cxxabi_forced.h
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)
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# Create include directories.
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file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include")
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file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/bits")
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set(LIBCXX_LIBSUPCXX_FILE_PATHS)
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foreach(path ${LIBCXX_LIBSUPCXX_FILES})
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set(found FALSE)
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foreach(incpath ${LIBCXX_LIBSUPCXX_INCLUDE_PATHS})
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if (EXISTS "${incpath}/${path}")
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set(found TRUE)
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get_filename_component(dstdir ${path} PATH)
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get_filename_component(file ${path} NAME)
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add_custom_command(
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OUTPUT "${CMAKE_BINARY_DIR}/include/${dstdir}/${file}"
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COMMAND ${CMAKE_COMMAND} -E copy_if_different
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"${incpath}/${path}"
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"${CMAKE_BINARY_DIR}/include/${dstdir}"
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MAIN_DEPENDENCY "${incpath}/${path}"
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)
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list(APPEND LIBCXX_CXX_ABI_DEPS
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"${CMAKE_BINARY_DIR}/include/${dstdir}/${file}")
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endif()
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endforeach()
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if (NOT found)
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message(FATAL_ERROR "Failed to find ${path}")
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endif()
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endforeach()
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add_custom_target(supcxx_headers DEPENDS ${LIBCXX_CXX_ABI_DEPS})
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set(LIBCXX_CXX_ABI_DEPS supcxx_headers)
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include_directories("${CMAKE_BINARY_DIR}/include")
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install(DIRECTORY "${CMAKE_BINARY_DIR}/include/"
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DESTINATION include/c++/v1
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FILES_MATCHING
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PATTERN "*"
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)
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elseif (NOT "${LIBCXX_CXX_ABI}" STREQUAL "none")
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message(FATAL_ERROR
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"Currently only none and libsupc++ are supported for c++ abi.")
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endif ()
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# Configure compiler.
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include(config-ix)
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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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set(LIBCXX_CXX_REQUIRED_FLAGS -nostdinc++)
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endif()
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if (LIBCXX_ENABLE_CXX0X AND LIBCXX_HAS_STDCXX0X_FLAG)
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list(APPEND LIBCXX_CXX_REQUIRED_FLAGS -std=c++0x)
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endif()
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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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append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WALL_FLAG -Wall)
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append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_W_FLAG -W)
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append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter)
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append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings)
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append_if(LIBCXX_CXX_WARNING_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_CXX_WARNING_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror)
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append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WX_FLAG -WX)
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endif()
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if (LIBCXX_ENABLE_PEDANTIC)
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append_if(LIBCXX_CXX_WARNING_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_FEATURE_FLAGS LIBCXX_HAS_EHSC_FLAG -EHsc)
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else()
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list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_NO_EXCEPTIONS)
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append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHS_FLAG -EHs-)
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append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_EHA_FLAG -EHa-)
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append_if(LIBCXX_CXX_FEATURE_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_FEATURE_FLAGS -D_LIBCPP_NO_RTTI)
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append_if(LIBCXX_CXX_FEATURE_FLAGS LIBCXX_HAS_NO_GR_FLAG -GR-)
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append_if(LIBCXX_CXX_FEATURE_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_CXX_FEATURE_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_CXX_FEATURE_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_CXX_FEATURE_FLAGS -DNDEBUG)
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endif()
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endif()
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# This is the _ONLY_ place where add_definitions is called.
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add_definitions(
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${LIBCXX_CXX_REQUIRED_FLAGS}
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${LIBCXX_CXX_WARNING_FLAGS}
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${LIBCXX_CXX_FEATURE_FLAGS}
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)
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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 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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