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76 lines
2.9 KiB
76 lines
2.9 KiB
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# This function generates a "unique" identifier based on various properties
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# given as arguments. The idea is to encode all ABI-affecting properties
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# in that identifier, so that we can store ABI information and associate it
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# to a specific ABI configuration.
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#
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# Right now, this is done by using the ABI identifier as the filename containing
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# the list of symbols exported by libc++ for that configuration, however we could
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# make it more sophisticated if the number of ABI-affecting parameters grew.
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function(cxx_abi_list_identifier result triple abi_library abi_version unstable exceptions new_delete_in_libcxx)
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set(abi_properties)
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if ("${triple}" MATCHES "darwin")
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# Ignore the major, minor, and patchlevel versions of darwin targets.
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string(REGEX REPLACE "darwin[0-9]+\\.[0-9]+\\.[0-9]+" "darwin" triple "${triple}")
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elseif("${triple}" MATCHES "freebsd")
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# Ignore the major and minor versions of freebsd targets.
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string(REGEX REPLACE "freebsd[0-9]+\\.[0-9]+" "freebsd" triple "${triple}")
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endif()
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list(APPEND abi_properties "${triple}")
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list(APPEND abi_properties "${abi_library}")
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list(APPEND abi_properties "v${abi_version}")
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if (${unstable})
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list(APPEND abi_properties "unstable")
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else()
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list(APPEND abi_properties "stable")
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endif()
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if (${exceptions})
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list(APPEND abi_properties "exceptions")
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else()
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list(APPEND abi_properties "noexceptions")
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endif()
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if (${new_delete_in_libcxx})
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list(APPEND abi_properties "new_in_libcxx")
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else()
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list(APPEND abi_properties "no_new_in_libcxx")
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endif()
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list(JOIN abi_properties "." tmp)
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set(${result} "${tmp}" PARENT_SCOPE)
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endfunction()
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cxx_abi_list_identifier(abi_list_identifier
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"${TARGET_TRIPLE}"
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"${LIBCXX_CXX_ABI_LIBNAME}"
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"${LIBCXX_ABI_VERSION}"
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"${LIBCXX_ABI_UNSTABLE}"
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"${LIBCXX_ENABLE_EXCEPTIONS}"
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"${LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS}"
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)
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if (TARGET cxx_shared)
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set(abi_list_file "${CMAKE_CURRENT_SOURCE_DIR}/${abi_list_identifier}.abilist")
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if (EXISTS "${abi_list_file}")
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add_custom_target(check-cxx-abilist
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"${Python3_EXECUTABLE}" "${LIBCXX_SOURCE_DIR}/utils/sym_diff.py"
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--only-stdlib-symbols
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--strict "${abi_list_file}"
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$<TARGET_SONAME_FILE:cxx_shared>
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DEPENDS cxx_shared
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COMMENT "Testing libc++'s exported symbols against the ABI list")
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else()
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message(STATUS "ABI list file not generated for configuration ${abi_list_identifier}, `check-cxx-abilist` will not be available.")
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endif()
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add_custom_target(generate-cxx-abilist
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COMMAND "${Python3_EXECUTABLE}" "${LIBCXX_SOURCE_DIR}/utils/generate_abi_list.py"
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--output "${abi_list_file}"
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"$<TARGET_SONAME_FILE:cxx_shared>"
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DEPENDS cxx_shared
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COMMENT "Generating the ABI list file for configuration ${abi_list_identifier}")
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else()
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message(STATUS "Not building a shared library for libc++ -- the ABI list targets will not be available.")
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endif()
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