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390 lines
16 KiB
ReStructuredText
390 lines
16 KiB
ReStructuredText
CMake 3.24 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 3.23 include the following.
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New Features
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============
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Presets
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-------
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* :manual:`cmake-presets(7)` files now support schema version ``5``.
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* :manual:`cmake-presets(7)` files now support a ``${pathListSep}`` macro,
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which expands to ``:`` or ``;`` based on the platform.
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* :manual:`cmake-presets(7)` files gained support for specifying a
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``testOutputTruncation`` field in test presets, which specifies the
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truncation mode once the maximum test output size has been reached.
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Generators
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----------
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* The :generator:`Green Hills MULTI` generator now generates build
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rules to re-run CMake if any CMake files are updated.
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* The :ref:`Visual Studio Generators` now support ``SYSTEM`` headers
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when using VS 2019 Update 11 or later.
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Command-Line
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------------
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* :manual:`cmake(1)` gained the :option:`--fresh <cmake --fresh>` command-line
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option to remove any existing ``CMakeCache.txt`` file and associated ``CMakeFiles/``
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directory, when configuring a build tree, thus starting a new configuration
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as if the build tree were freshly created.
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* :manual:`cmake(1)` gained the
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:option:`--compile-no-warning-as-error <cmake --compile-no-warning-as-error>`
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command-line option which causes the effects of the
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:prop_tgt:`COMPILE_WARNING_AS_ERROR` target property and
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:variable:`CMAKE_COMPILE_WARNING_AS_ERROR` variable to be ignored.
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* The :manual:`cmake(1)` :option:`--trace=json-v1 <cmake --trace>` trace
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format gained fields ``global_frame`` and ``line_end``.
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* The :manual:`cmake(1)` :option:`-E <cmake -E>` commands :option:`cat <cmake-E cat>`
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and :option:`env <cmake-E env>` learned to respect a double dash
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(:option:`-- <cmake-E_env -->`) argument that acts as a delimiter indicating
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the end of options. Any following arguments are treated as operands/positional
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arguments, even if they begin with a dash ``-`` character.
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* The :manual:`cmake(1)` :option:`-E tar <cmake-E tar>` command gained the
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:option:`--touch <cmake-E_tar --touch>` option
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to keep the current local timestamp instead of extracting file timestamps
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from the archive.
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Compilers
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---------
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* LLVM's `flang`_ Fortran compiler is now supported on some platforms,
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with compiler id ``LLVMFlang``.
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.. _`flang`: https://github.com/llvm/llvm-project/tree/main/flang
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* ADSP compiler support (SHARC and Blackfin) now covers both CCES and
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VDSP++ installations, with required configuration now done in the
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compiler module itself rather than the ``Generic-ADSP`` platform module.
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Platforms
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---------
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* A dedicated ``ADSP`` platform has been added
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to replace the existing ``Generic-ADSP`` implementation.
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This features automatic detection of the latest CCES/VDSP++ install
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and compiler selection (``cc21k`` vs. ``ccblkfn``)
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based off of the :variable:`CMAKE_SYSTEM_PROCESSOR` variable.
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Commands
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--------
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* The :command:`cmake_host_system_information` command, on Windows,
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gained a ``QUERY WINDOWS_REGISTRY`` mode.
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See its :ref:`Query Windows registry` section.
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* The :command:`cmake_language` command gained a new
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``SET_DEPENDENCY_PROVIDER`` sub-command. When a dependency provider is set,
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calls to :command:`find_package` and :command:`FetchContent_MakeAvailable`
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can be redirected through a custom command, which can choose to fulfill the
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request directly, modify how the request is processed, or leave it to be
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fulfilled by the built-in implementation. See :ref:`dependency_providers`.
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* The :command:`file(DOWNLOAD)` command gained options ``RANGE_START`` and
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``RANGE_END`` to specify a range of bytes to download. This can be
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useful for downloading parts of big binary files.
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* The :command:`find_file`, :command:`find_path`, :command:`find_library`,
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:command:`find_program`, and :command:`find_package` commands gained the
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``NO_CMAKE_INSTALL_PREFIX`` option to control searching
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:variable:`CMAKE_INSTALL_PREFIX`.
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* The :command:`find_file`, :command:`find_path`, :command:`find_library`,
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:command:`find_program`, and :command:`find_package` commands gained the
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ability to specify which Windows Registry views must be queried.
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* The :command:`find_package` command gained a ``GLOBAL`` option that
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allows for the promotion of imported targets to global scope for the
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duration of the :command:`find_package` call.
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* The :command:`if` command gained the capability to compare paths by
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using the ``PATH_EQUAL`` operator. See policy :policy:`CMP0139`.
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Variables
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---------
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* The :variable:`CMAKE_COLOR_DIAGNOSTICS` variable was added to control
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color diagnostics generated by compilers. This variable also controls
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color build system messages with :ref:`Makefile Generators`, replacing
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:variable:`CMAKE_COLOR_MAKEFILE`.
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The :envvar:`CMAKE_COLOR_DIAGNOSTICS` environment variable was added to set
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a default value for :variable:`CMAKE_COLOR_DIAGNOSTICS`.
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* The :variable:`CMAKE_COMPILE_WARNING_AS_ERROR` variable and corresponding
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:prop_tgt:`COMPILE_WARNING_AS_ERROR` target property were added to enable
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compilation with a compiler-specific flag to treat warnings as errors,
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such as ``-Werror``.
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* The :variable:`CMAKE_CUDA_ARCHITECTURES` variable and associated
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:prop_tgt:`CUDA_ARCHITECTURES` target property now support the
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special ``native`` value to compile for the architectures(s)
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of the host's GPU(s).
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* The :variable:`CMAKE_FIND_PACKAGE_TARGETS_GLOBAL` variable was added to
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toggle behavior of the :command:`find_package` command's new ``GLOBAL``
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option.
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* The :variable:`CMAKE_FIND_USE_INSTALL_PREFIX` variable was added to toggle
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behavior of the :command:`find_file`, :command:`find_library`,
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:command:`find_path`, :command:`find_package`, and :command:`find_program`
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commands' new ``NO_CMAKE_INSTALL_PREFIX`` option.
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* The :variable:`CMAKE_PROJECT_TOP_LEVEL_INCLUDES` variable was added to allow
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injecting custom code at the site of the first :command:`project` call,
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after the host and target platform details have been determined.
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* The :variable:`CMAKE_TRY_COMPILE_NO_PLATFORM_VARIABLES` variable
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was added to tell the :command:`try_compile` command not to
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pass any platform variables to the test project.
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* The :variable:`CMAKE_VERIFY_INTERFACE_HEADER_SETS` variable and
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corresponding :prop_tgt:`VERIFY_INTERFACE_HEADER_SETS` target property
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were added to enable build rules that verify all headers in header sets
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can be used on their own.
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* The :variable:`CMAKE_VS_NO_COMPILE_BATCHING` variable and corresponding
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:prop_tgt:`VS_NO_COMPILE_BATCHING` target property were added to
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tell :ref:`Visual Studio Generators` whether to disable compiler
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parallelism and call the compiler with one source file at a time.
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* The :variable:`CMAKE_WATCOM_RUNTIME_LIBRARY` variable and
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:prop_tgt:`WATCOM_RUNTIME_LIBRARY` target property were introduced to
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select the runtime library used by compilers targeting the Watcom ABI.
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See policy :policy:`CMP0136`.
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* The :variable:`CMAKE_XCODE_XCCONFIG` variable and corresponding
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:prop_tgt:`XCODE_XCCONFIG` target property were added to tell
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the :generator:`Xcode` generator to handle ``xcconfig`` files.
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Properties
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----------
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* The :prop_tgt:`INTERFACE_LINK_LIBRARIES_DIRECT` and
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:prop_tgt:`INTERFACE_LINK_LIBRARIES_DIRECT_EXCLUDE` target properties
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were added to express usage requirements affecting a consumer's
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direct link dependencies.
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* The :prop_tgt:`INTERFACE_HEADER_SETS_TO_VERIFY` target property was
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added to specify which header sets should be verified by
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:prop_tgt:`VERIFY_INTERFACE_HEADER_SETS`.
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* The :prop_tgt:`LINK_LIBRARIES` target property now supports
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the :genex:`$<LINK_ONLY:...>` generator expression.
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See policy :policy:`CMP0131`.
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* The :prop_tgt:`VS_DOTNET_STARTUP_OBJECT` target property was added to
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tell :ref:`Visual Studio Generators` which startup class shall be used
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when the program or project is executed. This is necessary when more
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than one ``static void Main(string[])`` function signature is available
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in a managed .NET project.
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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 new ``DOWNLOAD_EXTRACT_TIMESTAMP`` option for
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controlling whether the timestamps of extracted contents are set to
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match those in the archive when the ``URL`` download method is used.
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Policy :policy:`CMP0135` was added to enable the option by default.
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* The :module:`FetchContent` module and the :command:`find_package` command
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now support integration capabilities:
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* :command:`FetchContent_MakeAvailable` can now try to satisfy a dependency
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by calling :command:`find_package` first. A new
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:variable:`FETCHCONTENT_TRY_FIND_PACKAGE_MODE` variable controls whether
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this is done by default for all dependencies, is opt-in per dependency,
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or is disabled entirely.
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* :command:`find_package` can be re-routed to call
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:command:`FetchContent_MakeAvailable` instead. A new read-only
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:variable:`CMAKE_FIND_PACKAGE_REDIRECTS_DIR` variable points to a
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directory where config package files can be located to facilitate these
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re-routed calls.
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* The :module:`FindJNI` module now provides imported targets.
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* The :module:`FindMatlab` module :command:`matlab_add_mex` function
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gained a ``NO_IMPLICIT_LINK_TO_MATLAB_LIBRARIES`` option to disable
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automatic linking of MATLAB libraries.
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* The :module:`FindVulkan` module now supports components to select which
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VulkanSDK tool and libraries to find in addition to the Vulkan SDK headers
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and library.
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* The :module:`FindZLIB` gained a new ``ZLIB_USE_STATIC_LIBS`` variable to
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search only for static libraries.
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Generator Expressions
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---------------------
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* The :genex:`LINK_LIBRARY` generator expression was added to manage how
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libraries are specified during the link step.
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The :variable:`CMAKE_<LANG>_LINK_LIBRARY_USING_<FEATURE>` and
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:variable:`CMAKE_LINK_LIBRARY_USING_<FEATURE>` variables are used to define
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features usable by the :genex:`LINK_LIBRARY` generator expression.
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Moreover, the :prop_tgt:`LINK_LIBRARY_OVERRIDE` and
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:prop_tgt:`LINK_LIBRARY_OVERRIDE_<LIBRARY>` target properties are
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available to resolve incompatible features.
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The :genex:`LINK_LIBRARY` generator expression can link frameworks in
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various ways when targeting ``Apple`` platforms.
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The following features were added:
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* ``FRAMEWORK``
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* ``NEEDED_FRAMEWORK``
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* ``REEXPORT_FRAMEWORK``
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* ``WEAK_FRAMEWORK``
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The :genex:`LINK_LIBRARY` generator expression can link libraries in
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various ways when targeting ``Apple`` platforms.
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The following features were added:
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* ``NEEDED_LIBRARY``
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* ``REEXPORT_LIBRARY``
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* ``WEAK_LIBRARY``
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The :genex:`LINK_LIBRARY` generator expression gained the feature
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``WHOLE_ARCHIVE`` to force load of all members in a static library.
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This feature is supported on the following target platforms:
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* all ``Apple`` variants
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* ``Linux``
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* all ``BSD`` variants
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* ``SunOS``
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* ``Windows``
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* ``CYGWIN``
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* ``MSYS``
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* The :genex:`LINK_GROUP` generator expression was added to manage the
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grouping of libraries during the link step. The
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:variable:`CMAKE_<LANG>_LINK_GROUP_USING_<FEATURE>` and
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:variable:`CMAKE_LINK_GROUP_USING_<FEATURE>` variables are used to define
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features usable with the :genex:`LINK_GROUP` generator expression.
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This release defines the ``RESCAN`` feature, which can be used to handle
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circular references among static libraries when using toolchains for
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Linux, BSD, SunOS and GNU toolchains for Windows.
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* The :genex:`PATH` generator expression was added to manage paths.
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* The :genex:`PATH_EQUAL` generator expression was added to manage path
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comparisons.
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* The :genex:`TARGET_BUNDLE_DIR_NAME` generator expression
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was added to evaluate to the name of the bundle directory
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for a given bundle target.
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CTest
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-----
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* :manual:`ctest(1)` gained a
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:option:`--test-output-truncation <ctest --test-output-truncation>` option
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(and corresponding :variable:`CTEST_CUSTOM_TEST_OUTPUT_TRUNCATION` variable)
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to specify the truncation mode once the maximum test output size has been
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reached. Possible values are ``tail`` (default), ``middle`` or ``head``.
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CPack
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-----
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* The :cpack_gen:`CPack WIX Generator` gained a new variable,
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:variable:`CPACK_WIX_ARCHITECTURE`, to specify the installer architecture
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in order to support computers running Windows for ARM.
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* CPack now supports the :variable:`CPACK_THREADS` option for ``zstd``
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compression when compiled with libarchive 3.6 or higher. It is
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supported by official CMake binaries available on `cmake.org`_.
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Deprecated and Removed Features
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===============================
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* The :module:`CPack` module no longer enables the SLA by default in the
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:cpack_gen:`CPack DragNDrop Generator`. See policy :policy:`CMP0133`
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and the :variable:`CPACK_DMG_SLA_USE_RESOURCE_FILE_LICENSE` variable.
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* The deprecated :cpack_gen:`CPack PackageMaker Generator` has been removed.
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* The :module:`FindGLUT` module no longer provides the undocumented
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``GLUT_LIBRARY`` and ``GLUT_INCLUDE_PATH`` result variables.
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* The :module:`FindVulkan` module no longer silently ignores unknown
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components requested by a ``find_package(Vulkan REQUIRED ...)`` call.
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With the addition of support for components, requests for unknown
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components now produce an error.
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Other Changes
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=============
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* CMake no longer sets environment variables like :envvar:`CC`, :envvar:`CXX`,
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etc. when enabling the corresponding language during the first CMake run in
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a build directory. See policy :policy:`CMP0132`.
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* The :module:`CheckIPOSupported` module :command:`check_ipo_supported`
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command now uses the caller's :variable:`CMAKE_<LANG>_FLAGS`
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and :variable:`CMAKE_<LANG>_FLAGS_<CONFIG>` values.
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See policy :policy:`CMP0138`.
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* The :generator:`MSYS Makefiles` and :generator:`MinGW Makefiles`
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generators, when a compiler is not explicitly specified, now select
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the first compiler (of any name) found in directories listed by the
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``PATH`` environment variable.
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* The :command:`try_compile` command
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:ref:`whole-project <Try Compiling Whole Projects>` signature
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now propagates platform variables. See policy :policy:`CMP0137`.
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* The :command:`while` command now diagnoses errors during condition
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evaluation. See policy :policy:`CMP0130`.
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* The precompiled macOS binaries provided on `cmake.org`_ no longer attach a
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SLA to the ``.dmg`` packages. This was removed because macOS 12 deprecated
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the tools used to attach ``.dmg`` resources.
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* A precompiled Windows ``arm64`` binary is now provided on `cmake.org`_.
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.. _`cmake.org`: https://cmake.org/download/
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Updates
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=======
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Changes made since CMake 3.24.0 include the following.
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3.24.1, 3.24.2
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--------------
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* These versions made no changes to documented features or interfaces.
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Some implementation updates were made to support ecosystem changes
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and/or fix regressions.
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3.24.3
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------
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* The ``LLVMFlang`` Fortran compiler support added in 3.24.0 has been extended:
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* It now supports mixed-language linking between Fortran and C or CXX.
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* It now supports the GNU ABI (MinGW) on Windows, but not yet the MSVC ABI.
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* Some implementation updates were made to support ecosystem changes
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and/or fix regressions.
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3.24.4
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------
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* This version made no changes to documented features or interfaces.
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Some implementation updates were made to support ecosystem changes
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and/or fix regressions.
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