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358 lines
14 KiB
ReStructuredText
358 lines
14 KiB
ReStructuredText
CMake 3.17 Release Notes
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************************
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.. only:: html
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.. contents::
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Changes made since CMake 3.16 include the following.
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New Features
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============
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Generators
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----------
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* :manual:`cmake(1)` gained a :generator:`Ninja Multi-Config` generator,
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which is similar to the :generator:`Ninja` generator but can be used to build
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multiple configurations at once.
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* :ref:`Visual Studio Generators` learned to support per-config sources.
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Previously only :ref:`Command-Line Build Tool Generators` supported them.
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* :ref:`Visual Studio Generators` for VS 2010 and above now support
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specifying the ``VCTargetsPath`` value for project files in
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:variable:`CMAKE_GENERATOR_TOOLSET` setting.
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* :ref:`Visual Studio Generators` for VS 2010 and above learned to
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support .NET Standard and .NET Core. See the
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:prop_tgt:`DOTNET_TARGET_FRAMEWORK` target property and
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associated :variable:`CMAKE_DOTNET_TARGET_FRAMEWORK` variable.
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Languages
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---------
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* The :manual:`Compile Features <cmake-compile-features(7)>` functionality
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now offers meta-features for the CUDA language standard levels
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(e.g. ``cuda_std_03``, ``cuda_std_14``). See
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:prop_gbl:`CMAKE_CUDA_KNOWN_FEATURES`.
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Compilers
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---------
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* The IBM XL Fortran compiler is now supported by the :generator:`Ninja`
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generator.
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Command-Line
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------------
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* :manual:`cmake(1)` gained a ``--debug-find`` command-line option to
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enable additional human-readable output on where ``find_*`` commands search.
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* :manual:`cmake(1)` gained a ``--trace-format`` command-line option that
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can be used to set the ``--trace`` output format. Currently, the old
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human readable and the new JSON format are supported. The new JSON format
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is easier to parse automatically than the existing format.
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* :manual:`cmake(1)` gained a ``-E rm`` command-line tool that can be
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used to remove directories and files. This supersedes the existing
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``-E remove`` and ``-E remove_directory`` tools and has better semantics.
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Commands
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--------
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* The :command:`add_custom_command` command learned to interpret paths in
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``DEPENDS`` arguments that are specified relative to the current
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binary directory.
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* The :command:`foreach` command learned a new ``ZIP_LISTS`` option to iterate
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over multiple lists simultaneously.
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* The :command:`load_cache(READ_WITH_PREFIX)` command mode is now allowed
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when using ``cmake -P`` to :ref:`Run a Script <Script Processing Mode>`.
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* The :command:`message` command learned to output context provided in
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the :variable:`CMAKE_MESSAGE_CONTEXT` variable for log levels
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``NOTICE`` and below. Enable this output with the new ``--log-context``
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command-line option or :variable:`CMAKE_MESSAGE_CONTEXT_SHOW` variable.
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* The :command:`message` command gained new keywords ``CHECK_START``,
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``CHECK_PASS`` and ``CHECK_FAIL``.
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* The :command:`target_compile_options` command now honors the ``BEFORE``
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keyword more consistently. See policy :policy:`CMP0101`.
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Variables
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---------
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* A :variable:`CMAKE_CTEST_ARGUMENTS` variable was added to specify a list
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of command-line arguments passed to CTest when running through the
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``test`` (or ``RUN_TESTS``) target of the generated build system.
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* The following variables are now defined inside a :command:`function`:
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- :variable:`CMAKE_CURRENT_FUNCTION`
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- :variable:`CMAKE_CURRENT_FUNCTION_LIST_DIR`
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- :variable:`CMAKE_CURRENT_FUNCTION_LIST_FILE`
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- :variable:`CMAKE_CURRENT_FUNCTION_LIST_LINE`
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* The :variable:`CMAKE_CUDA_RUNTIME_LIBRARY` variable and
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:prop_tgt:`CUDA_RUNTIME_LIBRARY` target property were introduced to
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select the CUDA runtime library used when linking targets that
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use CUDA.
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* The :variable:`CMAKE_FIND_DEBUG_MODE` variable was introduced to
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print extra ``find_*`` call information during the cmake run to standard
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error. Output is designed for human consumption and not for parsing.
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* The :variable:`CMAKE_EXPORT_COMPILE_COMMANDS` variable now takes its
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initial value from the :envvar:`CMAKE_EXPORT_COMPILE_COMMANDS` environment
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variable if no explicit configuration is given.
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* The :variable:`CMAKE_<LANG>_COMPILER_LAUNCHER` variable, if not set
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explicitly, now takes its initial value from the
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:envvar:`CMAKE_<LANG>_COMPILER_LAUNCHER` environment variable.
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* The :variable:`CMAKE_MESSAGE_LOG_LEVEL` variable can now be used
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to persist a log level between CMake runs, unlike the ``--log-level``
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command line option which only applies to that particular run.
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* The :variable:`CMAKE_XCODE_SCHEME_ENVIRONMENT` variable was added
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to initialize the :prop_tgt:`XCODE_SCHEME_ENVIRONMENT` target property.
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* The :variable:`CMAKE_XCODE_SCHEME_WORKING_DIRECTORY` variable and
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associated :prop_tgt:`XCODE_SCHEME_WORKING_DIRECTORY` target property
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were added to tell the :generator:`Xcode` generator to set the value of
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the ``Custom Working Directory`` schema option.
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Properties
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----------
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* The :prop_tgt:`AIX_EXPORT_ALL_SYMBOLS` target property and associated
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:variable:`CMAKE_AIX_EXPORT_ALL_SYMBOLS` variable were created to
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optionally explicitly disable automatic export of symbols from shared
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libraries on AIX.
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* The :prop_tgt:`DEPRECATION` target property was added to mark
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a target as deprecated. If a linked target is marked as
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deprecated, a warning with the deprecation message is issued
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at generate time.
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* The :prop_tgt:`INSTALL_NAME_DIR` target property now supports
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:manual:`generator expressions <cmake-generator-expressions(7)>`.
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In particular, the :genex:`$<INSTALL_PREFIX>` generator expression can
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be used to set the directory relative to the install-time prefix.
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* Target properties :prop_tgt:`MACHO_COMPATIBILITY_VERSION` and
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:prop_tgt:`MACHO_CURRENT_VERSION` were added to set the
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``compatibility_version`` and ``curent_version``, respectively,
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for Mach-O binaries. For backwards compatibility, if these properties
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are not set, :prop_tgt:`SOVERSION` and :prop_tgt:`VERSION`
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are used respectively as fallbacks.
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* The :prop_tgt:`VS_DOTNET_DOCUMENTATION_FILE` target property was added
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to tell :ref:`Visual Studio Generators` to generate a ``DocumentationFile``
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reference in ``.csproj`` files.
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Modules
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-------
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* The :module:`ExternalProject` module :command:`ExternalProject_Add`
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command gained a ``GIT_SUBMODULES_RECURSE`` option to specify whether
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Git submodules should be updated recursively. The default is on to
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preserve existing behavior.
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* The :module:`FindCUDAToolkit` module was added to find the
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CUDA Toolkit without enabling CUDA as a language.
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* The :module:`FindCURL` module learned to find CURL using
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the ``CURLConfig.cmake`` package configuration file generated by
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CURL's cmake buildsystem. It also gained a new ``CURL_NO_CURL_CMAKE``
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option to disable this behavior.
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* The :module:`FindFLEX` module's ``FLEX_TARGET`` command now runs ``flex``
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with :variable:`CMAKE_CURRENT_BINARY_DIR` as the working directory.
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See policy :policy:`CMP0098`.
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* The :module:`FindLibArchive` module now provides an imported target
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for libarchive.
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* The :module:`FindPython` module has learned to find Python components
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in active virtual environments managed by ``conda``.
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* The :module:`FindPython3` and :module:`FindPython` modules gained,
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respectively, variable ``Python3_SOABI`` and ``Python_SOABI`` giving
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the standard extension suffix for modules. Moreover, commands
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``Python3_add_library()`` and ``Python_add_library()`` gained the option
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``WITH_SOABI`` to prefix the library suffix with the value of ``SOABI``.
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* The :module:`FindLibXml2` module now provides an imported target for the
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``xmllint`` executable.
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Autogen
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-------
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* :prop_tgt:`AUTOMOC` and :prop_tgt:`AUTOUIC` learned to process headers
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with a ``.hh`` extension. See policy :policy:`CMP0100`.
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CTest
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-----
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* The :variable:`CTEST_CONFIGURATION_TYPE` variable is now set from the
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command line when :manual:`ctest(1)` is invoked with ``-C <cfg>``.
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* The :manual:`ctest(1)` tool gained support for Dr. Memory to run
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memcheck runs.
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* The :manual:`ctest(1)` tool gained a ``--no-tests=<[error|ignore]>`` option
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to explicitly set and unify the behavior between direct invocation and
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script mode if no tests were found.
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* The :manual:`ctest(1)` tool gained a ``--repeat <mode>:<n>`` option
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to specify conditions in which to repeat tests. This generalizes
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the existing ``--repeat-until-fail <n>`` option to add modes for
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``until-pass`` and ``after-timeout``.
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* The :command:`ctest_test` command gained a ``REPEAT <mode>:<n>`` option
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to specify conditions in which to repeat tests.
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CPack
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-----
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* The :cpack_gen:`CPack DragNDrop Generator` learned to use
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the :variable:`CPACK_DMG_<component>_FILE_NAME` variable
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to set a custom filename when packaging components into
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their own DMGs.
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* The :cpack_gen:`CPack DragNDrop Generator` learned to handle
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RTF formatted license files. When :variable:`CPACK_DMG_SLA_DIR`
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variable is set, ``<language>.license.rtf`` is considered, but
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only as a fallback when the plaintext (``.txt``) file is not found
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in order to maintain backwards compatibility.
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* The :cpack_gen:`CPack NSIS Generator` gained a new variable
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:variable:`CPACK_NSIS_MUI_HEADERIMAGE` to set the header image.
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To not break existing setups, it still defaults to
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:variable:`CPACK_PACKAGE_ICON` if the new variable is not set.
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* The :cpack_gen:`CPack NSIS Generator` now supports
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:variable:`CPACK_NSIS_UNINSTALL_NAME`.
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This can be used to specify the name of the Uninstall program.
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* The :cpack_gen:`CPack NSIS Generator` now supports
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:variable:`CPACK_NSIS_WELCOME_TITLE` and
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:variable:`CPACK_NSIS_WELCOME_TITLE_3LINES`.
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These can be used to specify the welcome page title and display it in 3 lines.
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* The :cpack_gen:`CPack NSIS Generator` now supports
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:variable:`CPACK_NSIS_FINISH_TITLE` and
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:variable:`CPACK_NSIS_FINISH_TITLE_3LINES`.
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These can be used to specify the finish page title and display it in 3 lines.
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* The :cpack_gen:`CPack productbuild Generator` gained support for a
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:variable:`CPACK_PRODUCTBUILD_BACKGROUND` variable to specify a background
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image for the macOS installer.
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Other
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-----
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* :manual:`ccmake(1)` now displays cache values using colors
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based on the entry type if the terminal supports color.
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* :manual:`ccmake(1)` now displays messages and a progress bar during
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configure and generate. It will keep the output displayed if any
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errors or warnings occurred.
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Deprecated and Removed Features
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===============================
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* An explicit deprecation diagnostic was added for policy ``CMP0068``
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and policy ``CMP0069`` (``CMP0067`` and below were already deprecated).
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The :manual:`cmake-policies(7)` manual explains that the OLD behaviors
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of all policies are deprecated and that projects should port to the
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NEW behaviors.
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* The CPack ``PackageMaker`` generator has been
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deprecated because Xcode no longer distributes the PackageMaker tools.
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The undocumented ``OSXX11`` generator has also been deprecated.
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* The :manual:`cmake(1)` command-line ``-E remove`` and ``-E remove_directory``
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tools are deprecated in favor of the new ``-E rm`` tool. The older tools
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always returned 0 if a named path did not exist even without the force
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option and cannot be fixed without breaking compatibility, and so have
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been superseded.
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* The :cpack_gen:`CPack NSIS Generator` now requires NSIS 3.0 or later.
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Other Changes
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=============
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* The :manual:`file API <cmake-file-api(7)>` index file now emits a
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``multiConfig`` flag specifying whether or not the generator supports
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multiple output configurations.
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* Target link properties :prop_tgt:`INTERFACE_LINK_OPTIONS`,
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:prop_tgt:`INTERFACE_LINK_DIRECTORIES` and
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:prop_tgt:`INTERFACE_LINK_DEPENDS` are now transitive over private
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dependencies on static libraries.
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See policy :policy:`CMP0099`.
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* When using MinGW tools, the :command:`find_library` command no longer
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finds ``.dll`` files by default. Instead, it expects ``.dll.a`` import
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libraries to be available.
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* The :generator:`MinGW Makefiles` generator no longer issues an error if
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``sh.exe`` is present in the environment's ``PATH``.
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* The :generator:`Ninja` generator now prefers the first ninja build
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tool to appear in the ``PATH`` no matter whether it is called
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``ninja-build``, ``ninja``, or ``samu``. Previously the first
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of those names to appear anywhere in the ``PATH`` would be preferred.
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* With SDCC the ``sdar`` tool is now preferred over ``sdcclib`` as librarian.
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The latter was deprecated by SDCC 3.2.0 and removed in SDCC 3.8.6.
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* With SDCC the default flags no longer include any target-specific flags.
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Previously the default flags were hard-coded for 8051.
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* The :variable:`CMAKE_VS_GLOBALS` variable value now applies during
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compiler identification and in targets created by the
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:command:`add_custom_target` command.
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* The :generator:`Xcode` generator no longer hard-codes ``-Wmost``,
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``-Wno-four-char-constants``, and ``-Wno-unknown-pragmas`` warning flags.
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Updates
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=======
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Changes made since CMake 3.17.0 include the following.
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3.17.1
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------
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* CMake 3.17.0 updated the :cpack_gen:`CPack NSIS Generator` with changes
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that require NSIS 3.0 or later. CMake 3.17.1 now enforces the use
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of a sufficiently new version.
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3.17.3
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------
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* Selection of the Objective C or C++ compiler now considers the
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:envvar:`CC` or :envvar:`CXX` environment variable if the
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:envvar:`OBJC` or :envvar:`OBJCXX` environment variable is not set.
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* The :module:`FindPkgConfig` module now extracts include directories
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prefixed with ``-isystem`` into the ``*_INCLUDE_DIRS`` variables and
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:prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` target properties.
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Previously they would be places in ``*_CFLAGS_OTHER`` variables and
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:prop_tgt:`INTERFACE_COMPILE_OPTIONS` target properties.
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3.17.5
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------
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* The default value of :variable:`CMAKE_AUTOMOC_PATH_PREFIX` was changed to
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``OFF`` because this feature can break existing projects that have
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identically named header files in different include directories.
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This restores compatibility with behavior of CMake 3.15 and below.
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The default was also changed to ``OFF`` in 3.16.9.
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