1edf3166ef
This recommits r294707 with additional fixes. The main difference is libc++ now correctly builds without any ABI library. exception.cpp is a bloody mess. It's full of confusing #ifdef branches for each different ABI library we support, and it's getting unmaintainable. This patch breaks down exception.cpp into multiple different header files, roughly one per implementation. Additionally it moves the definitions of exceptions in new.cpp into the correct implementation header. This patch also removes an unmaintained libc++abi configuration. This configuration may still be used by Apple internally but there are no other possible users. If it turns out that Apple still uses this configuration internally I will re-add it in a later commit. See http://llvm.org/PR31904. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@294730 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
4.7 KiB
CMake
128 lines
4.7 KiB
CMake
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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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# abilib : The ABI library 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 be copied
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# twice: once into include/, so the libc++ build itself can find
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# them, and once into include/c++/v1, so that a clang built into
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# the same build area will find them. 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 abidefines abilib abifiles abidirs)
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list(APPEND LIBCXX_COMPILE_FLAGS ${abidefines})
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set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${LIBCXX_CXX_ABI_INCLUDE_PATHS}"
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CACHE PATH
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"Paths to C++ ABI header directories separated by ';'." FORCE
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)
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set(LIBCXX_CXX_ABI_LIBRARY_PATH "${LIBCXX_CXX_ABI_LIBRARY_PATH}"
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CACHE PATH
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"Paths to C++ ABI library directory"
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)
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set(LIBCXX_CXX_ABI_LIBRARY ${abilib})
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set(LIBCXX_ABILIB_FILES ${abifiles})
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# The place in the build tree where we store out-of-source headers.
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file(MAKE_DIRECTORY "${LIBCXX_BUILD_HEADERS_ROOT}")
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file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/c++/v1")
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foreach(_d ${abidirs})
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file(MAKE_DIRECTORY "${LIBCXX_BINARY_INCLUDE_DIR}/${_d}")
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file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/c++/v1/${_d}")
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endforeach()
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foreach(fpath ${LIBCXX_ABILIB_FILES})
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set(found FALSE)
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foreach(incpath ${LIBCXX_CXX_ABI_INCLUDE_PATHS})
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if (EXISTS "${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 ${fpath} NAME)
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file(COPY "${incpath}/${fpath}"
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DESTINATION "${LIBCXX_BINARY_INCLUDE_DIR}/${dstdir}"
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)
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file(COPY "${incpath}/${fpath}"
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DESTINATION "${CMAKE_BINARY_DIR}/include/c++/v1/${dstdir}"
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)
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if (LIBCXX_INSTALL_HEADERS)
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install(FILES "${LIBCXX_BINARY_INCLUDE_DIR}/${fpath}"
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DESTINATION include/c++/v1/${dstdir}
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COMPONENT libcxx
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PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
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)
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endif()
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list(APPEND abilib_headers "${LIBCXX_BINARY_INCLUDE_DIR}/${fpath}")
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endif()
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endforeach()
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if (NOT found)
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message(WARNING "Failed to find ${fpath}")
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endif()
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endforeach()
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include_directories("${LIBCXX_BINARY_INCLUDE_DIR}")
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endmacro()
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# Configure based on the selected ABI library.
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if ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libstdc++" OR
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"${LIBCXX_CXX_ABI_LIBNAME}" 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_LIBNAME}" 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(
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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_LIBNAME}" STREQUAL "libcxxabi")
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if (LIBCXX_CXX_ABI_INTREE)
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# Link against just-built "cxxabi" target.
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if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
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set(CXXABI_LIBNAME cxxabi_static)
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else()
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set(CXXABI_LIBNAME cxxabi_shared)
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endif()
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set(LIBCXX_LIBCPPABI_VERSION "2" PARENT_SCOPE)
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else()
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# Assume c++abi is installed in the system, rely on -lc++abi link flag.
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set(CXXABI_LIBNAME "c++abi")
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endif()
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set(HEADERS "cxxabi.h;__cxxabi_config.h")
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if (LIBCXX_CXX_ABI_SYSTEM)
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set(HEADERS "")
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endif()
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setup_abi_lib("-DLIBCXX_BUILDING_LIBCXXABI" ${CXXABI_LIBNAME} "${HEADERS}" "")
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elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxrt")
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setup_abi_lib("-DLIBCXXRT"
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"cxxrt" "cxxabi.h;unwind.h;unwind-arm.h;unwind-itanium.h" ""
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)
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elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "vcruntime")
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# Nothing TODO
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elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "none")
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list(APPEND LIBCXX_COMPILE_FLAGS "-D_LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY")
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elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "default")
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# Nothing TODO
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else()
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message(FATAL_ERROR
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"Unsupported c++ abi: '${LIBCXX_CXX_ABI_LIBNAME}'. \
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Currently libstdc++, libsupc++, libcxxabi, libcxxrt, default and none are
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supported for c++ abi."
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)
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endif ()
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