eb547816ea
Always use list(APPEND) as it will perform the desired action even if the list is empty or previously unset. The first set is harmless, however, the subsequent set was overwriting the previous flag setup resulting in an improper compilation command being generated. This manifested as a build failure on Linux when using cmake + ninja. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@203638 91177308-0d34-0410-b5e6-96231b3b80d8
287 lines
10 KiB
CMake
287 lines
10 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_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_BUILT_STANDALONE 1)
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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_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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option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON)
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set(CXXABIS none libcxxabi libcxxrt libstdc++ 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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#===============================================================================
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# Add an ABI library if appropriate
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#===============================================================================
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#
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# _setup_abi: Set up the build to use an ABI library
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#
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# Parameters:
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# abidefines: A list of defines needed to compile libc++ with the ABI library
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# abilibs : A list of libraries to link against
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# abifiles : A list of files (which may be relative paths) to copy into the
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# libc++ build tree for the build. These files will also be
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# installed alongside the libc++ headers.
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# abidirs : A list of relative paths to create under an include directory
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# in the libc++ build directory.
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#
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macro(setup_abi_lib abipathvar abidefines abilibs abifiles abidirs)
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list(APPEND LIBCXX_CXX_FEATURE_FLAGS ${abidefines})
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set(${abipathvar} "${${abipathvar}}"
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CACHE STRINGS
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"Paths to ABI include directories separate by ';'."
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)
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set(LIBCXX_CXX_ABI_LIBRARIES ${abilibs})
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set(LIBCXX_ABILIB_FILES ${abifiles})
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file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include")
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foreach(_d ${abidirs})
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file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/${_d}")
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endforeach()
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set(LIBCXX_ABILIB_FILE_PATHS)
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foreach(fpath ${LIBCXX_ABILIB_FILES})
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set(found FALSE)
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foreach(incpath ${${abipathvar}})
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if (EXISTS "${incpath}/${fpath}")
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set(found TRUE)
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get_filename_component(dstdir ${fpath} PATH)
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get_filename_component(ifile ${fpath} NAME)
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add_custom_command(
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OUTPUT "${CMAKE_BINARY_DIR}/include/${dstdir}/${ifile}"
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COMMAND ${CMAKE_COMMAND} -E copy_if_different
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"${incpath}/${fpath}"
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"${CMAKE_BINARY_DIR}/include/${dstdir}"
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MAIN_DEPENDENCY "${incpath}/${fpath}"
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)
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list(APPEND LIBCXX_CXX_ABI_DEPS
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"${CMAKE_BINARY_DIR}/include/${dstdir}/${ifile}"
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)
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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 ${fpath}")
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endif()
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endforeach()
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add_custom_target(abilib_headers DEPENDS ${LIBCXX_CXX_ABI_DEPS})
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set(LIBCXX_CXX_ABI_DEPS abilib_headers)
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include_directories("${CMAKE_BINARY_DIR}/include")
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install(DIRECTORY "${CMAKE_BINARY_DIR}/include/"
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DESTINATION include/c++/v1
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FILES_MATCHING
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PATTERN "*"
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)
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endmacro()
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if ("${LIBCXX_CXX_ABI}" STREQUAL "libstdc++" OR
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"${LIBCXX_CXX_ABI}" STREQUAL "libsupc++")
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set(_LIBSUPCXX_INCLUDE_FILES
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cxxabi.h bits/c++config.h bits/os_defines.h bits/cpu_defines.h
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bits/cxxabi_tweaks.h bits/cxxabi_forced.h
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)
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if ("${LIBCXX_CXX_ABI}" STREQUAL "libstdc++")
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set(_LIBSUPCXX_DEFINES "-DLIBSTDCXX")
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set(_LIBSUPCXX_LIBNAME stdc++)
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else()
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set(_LIBSUPCXX_DEFINES "")
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set(_LIBSUPCXX_LIBNAME supc++)
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endif()
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setup_abi_lib("LIBCXX_LIBSUPCXX_INCLUDE_PATHS"
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"-D__GLIBCXX__ ${_LIBSUPCXX_DEFINES}"
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"${_LIBSUPCXX_LIBNAME}" "${_LIBSUPCXX_INCLUDE_FILES}" "bits"
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)
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elseif ("${LIBCXX_CXX_ABI}" STREQUAL "libcxxabi")
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setup_abi_lib("LIBCXX_LIBCXXABI_INCLUDE_PATHS" ""
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"c++abi" "cxxabi.h" ""
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)
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elseif ("${LIBCXX_CXX_ABI}" STREQUAL "libcxxrt")
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setup_abi_lib("LIBCXX_LIBCXXRT_INCLUDE_PATHS" "-DLIBCXXRT"
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"cxxrt" "cxxabi.h;unwind.h;unwind-arm.h;unwind-itanium.h" ""
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)
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elseif (NOT "${LIBCXX_CXX_ABI}" STREQUAL "none")
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message(FATAL_ERROR
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"Currently libstdc++, libsupc++, libcxxabi, libcxxrt and none are "
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"supported for c++ abi."
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)
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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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list(APPEND 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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if (NOT MSVC)
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append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WALL_FLAG -Wall)
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list(APPEND LIBCXX_CXX_REQUIRED_FLAGS -Werror=return-type)
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endif()
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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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else()
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append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_ERROR_FLAG -Wno-error)
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append_if(LIBCXX_CXX_WARNING_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_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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# Static library
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if (NOT LIBCXX_ENABLE_SHARED)
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list(APPEND LIBCXX_CXX_FEATURE_FLAGS -D_LIBCPP_BUILD_STATIC)
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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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string(REPLACE ";" " " LIBCXX_CXX_REQUIRED_FLAGS "${LIBCXX_CXX_REQUIRED_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_REQUIRED_FLAGS}")
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string(REPLACE ";" " " LIBCXX_CXX_WARNING_FLAGS "${LIBCXX_CXX_WARNING_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_WARNING_FLAGS}")
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string(REPLACE ";" " " LIBCXX_CXX_FEATURE_FLAGS "${LIBCXX_CXX_FEATURE_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXX_CXX_FEATURE_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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