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216 lines
7.8 KiB
216 lines
7.8 KiB
CMake 3.28 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 3.27 include the following.
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New Features
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============
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Languages
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---------
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* C++ 20 named modules are now supported by :ref:`Ninja Generators`
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and :ref:`Visual Studio Generators` for VS 2022 and newer, in combination
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with the MSVC 14.34 toolset (provided with VS 17.4) and newer, LLVM/Clang
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16.0 and newer, and GCC 14 (after the 2023-09-20 daily bump) and newer.
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See :manual:`cmake-cxxmodules(7)` for details.
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* ``HIP`` language code may now be compiled for NVIDIA GPUs
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using the NVIDIA CUDA Compiler (NVCC).
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See the :variable:`CMAKE_HIP_PLATFORM` variable.
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Platforms
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---------
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* On Apple platforms, ``.xcframework`` folders are now supported:
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* The :command:`find_library` command now finds ``.xcframework`` folders.
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* The :command:`target_link_libraries` command now supports
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linking against a ``.xcframework`` folder.
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* The :prop_tgt:`IMPORTED_LOCATION` target property of an imported
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library target may now be the path to a ``.xcframework`` folder.
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* Apple visionOS and its ``xros`` and ``xrsimulator`` SDKs are now supported.
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Compiling for Apple visionOS can be requested by setting
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:variable:`CMAKE_SYSTEM_NAME` to ``visionOS``.
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See :ref:`Cross Compiling for iOS, tvOS, visionOS, or watchOS`
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for more information.
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Presets
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-------
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* :manual:`cmake-presets(7)` files now support schema version ``8``.
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It adds support for a ``$schema`` field.
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Compilers
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---------
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* Cray Clang-based compilers are now supported with
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:variable:`compiler id <CMAKE_<LANG>_COMPILER_ID>` ``CrayClang``.
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* The OrangeC compiler is now supported with
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:variable:`compiler id <CMAKE_<LANG>_COMPILER_ID>` ``OrangeC``.
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Commands
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--------
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* The :command:`add_custom_command` and :command:`add_custom_target`
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commands gained a ``JOB_SERVER_AWARE`` option.
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* The :command:`cmake_host_system_information` command gained a
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``MSYSTEM_PREFIX`` query for the installation prefix of a MSYS
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or MinGW development environment on Windows hosts.
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* The :command:`set_property` command ``TEST`` mode gained a ``DIRECTORY``
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option to set properties on tests in other directories.
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* The :command:`set_tests_properties` command gained a ``DIRECTORY``
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option to set properties on tests in other directories.
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* The :command:`get_property` command ``TEST`` mode gained a ``DIRECTORY``
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option to get properties on tests in other directories.
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* The :command:`get_test_property` command gained a ``DIRECTORY``
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option to get properties on tests in other directories.
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Variables
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---------
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* The :envvar:`CMAKE_CROSSCOMPILING_EMULATOR` environment variable
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was added to initialize the :variable:`CMAKE_CROSSCOMPILING_EMULATOR`
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cache variable.
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* The :variable:`CMAKE_HIP_PLATFORM` variable was added to specify
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the GPU platform for which HIP language sources are to be compiled
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(``amd`` or ``nvidia``).
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Properties
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----------
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* On imported shared libraries, the :prop_tgt:`IMPORTED_IMPLIB` target
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property may now be used without :prop_tgt:`IMPORTED_LOCATION`.
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This can be used to represent a stub library whose location should not
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be added as a runtime search path to dependents that link it.
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* The :prop_tgt:`IMPORTED_LOCATION` property of a macOS framework
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may now be a path to the ``.framework`` folder itself.
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* The :prop_tgt:`XCODE_EMBED_RESOURCES <XCODE_EMBED_<type>>` target property
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was added to tell the :generator:`Xcode` generator what targets to put in
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the ``Embed Resources`` build phase.
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Modules
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-------
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* The :module:`ExternalProject` module now includes the
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``BUILD_JOB_SERVER_AWARE`` option for the
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:command:`ExternalProject_Add` command. This option enables
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the integration of the GNU Make job server when using an
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explicit ``BUILD_COMMAND`` with certain :ref:`Makefile Generators`.
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Additionally, the :command:`ExternalProject_Add_Step` command
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has been updated to support the new ``JOB_SERVER_AWARE`` option.
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* The :module:`FetchContent` module's :command:`FetchContent_Declare` command
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gained an ``EXCLUDE_FROM_ALL`` option, which propagates through to the
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:command:`add_subdirectory` call made by
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:command:`FetchContent_MakeAvailable` for the dependency.
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* The :module:`FindCURL` module gained a ``CURL_USE_STATIC_LIBS`` hint
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to select static libraries.
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* The :module:`FindEXPAT` module gained an ``EXPAT_USE_STATIC_LIBS`` hint
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to select static libraries.
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* The :module:`FindPkgConfig` module :command:`pkg_get_variable` command
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gained a ``DEFINE_VARIABLES`` option to pass variables to ``pkg-config``.
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Generator Expressions
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---------------------
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* The :manual:`generator expressions <cmake-generator-expressions(7)>`
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:genex:`$<IF:...>`, :genex:`$<AND:...>`, and :genex:`$<OR:...>`
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short-circuit to avoid unnecessary evaluation of parameters.
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CTest
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-----
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* CTest may now take a :ref:`dynamically-generated resource spec file
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<ctest-resource-dynamically-generated-spec-file>`, which can be specified by the
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:prop_test:`GENERATED_RESOURCE_SPEC_FILE` test property.
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Deprecated and Removed Features
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===============================
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* The :command:`exec_program` command, which has been deprecated
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since CMake 3.0, has been removed by policy :policy:`CMP0153`.
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Use the :command:`execute_process` command instead.
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* The :generator:`Visual Studio 11 2012` generator has been removed.
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* The :generator:`Visual Studio 12 2013` generator is now deprecated
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and will be removed in a future version of CMake.
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* The :prop_tgt:`IOS_INSTALL_COMBINED` target property and corresponding
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:variable:`CMAKE_IOS_INSTALL_COMBINED` variable have been deprecated.
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Their functionality does not make sense on Apple Silicon hosts.
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* The :generator:`Xcode` generator will now issue a fatal error if
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the Legacy Build System has been selected for Xcode 14 and
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newer. Those Xcode versions dropped support for the Legacy Build
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System and expect the project to be set-up for their current
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Build System.
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Other Changes
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=============
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* Generated files, in targets using :ref:`file sets`, are now considered
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private by default. Generated public headers must be specified using
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file sets. This allows :ref:`Ninja Generators` to produce more
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efficient build graphs. See policy :policy:`CMP0154`.
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* The :command:`find_library`, :command:`find_path`, and :command:`find_file`
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commands no longer search in installation prefixes derived from the ``PATH``
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environment variable. This behavior was added in CMake 3.3 to support
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MSYS and MinGW (``MSYSTEM``) development environments on Windows, but
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it can search undesired prefixes that happen to be in the ``PATH`` for
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unrelated reasons. Users who keep some ``<prefix>/bin`` directories in
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the ``PATH`` just for their tools do not necessarily want any corresponding
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``<prefix>/lib`` or ``<prefix>/include`` directories searched.
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The behavior was reverted for non-Windows platforms by CMake 3.6.
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Now it has been reverted on Windows platforms too.
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One may set the ``CMAKE_PREFIX_PATH`` environment variable with a
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:ref:`semicolon-separated list <CMake Language Lists>` of prefixes
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that are to be searched.
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* When using MinGW tools in a ``MSYSTEM`` environment on Windows,
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the ``$MSYSTEM_PREFIX/local`` and ``$MSYSTEM_PREFIX`` prefixes are
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now added to :variable:`CMAKE_SYSTEM_PREFIX_PATH`.
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* The precompiled Linux ``x86_64`` binaries provided on
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`cmake.org <https://cmake.org/download/>`_ now require GLIBC 2.17 or higher.
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Updates
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=======
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Changes made since CMake 3.28.0 include the following.
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3.28.1, 3.28.2, 3.28.3
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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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3.28.4
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------
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* Apple visionOS support has been updated for the official Xcode 15.2
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release of the ``xros`` and ``xrsimulator`` SDKs.
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