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+CMake 4.2 Release Notes
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+***********************
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+
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+.. only:: html
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+
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+ .. contents::
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+
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+Changes made since CMake 4.1 include the following.
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+
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+New Features
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+============
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+
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+File-Based API
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+--------------
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+
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+* The :manual:`cmake-file-api(7)` "codemodel" version 2 ``version`` field has
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+ been updated to 2.9.
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+
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+* The :manual:`cmake-file-api(7)` "codemodel" version 2 "target" and
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+ "directory" objects gained a new ``codemodelVersion`` field.
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+
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+* The :manual:`cmake-file-api(7)` "codemodel" version 2 now includes imported
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+ targets and all interface library targets in its replies. Previously,
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+ imported targets were omitted, and only those interface targets that
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+ participated in the build system were included. The following changes
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+ support these new additions:
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+
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+ * The "target" object gained ``imported``, ``local``, and ``abstract`` fields.
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+ * The "target" object's ``type`` field can now also hold the value
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+ ``UNKNOWN_LIBRARY``.
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+ * The "codemodel" object's ``configurations`` entries gained a new
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+ ``abstractTargets`` array.
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+ * Entries in the ``directories`` and ``projects`` arrays of the "codemodel"
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+ object's ``configurations`` entries gained a new ``abstractTargetIndexes``
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+ array.
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+
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+* The :manual:`cmake-file-api(7)` "codemodel" version 2 "target" object gained
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+ new ``linkLibraries``, ``interfaceLinkLibraries``, ``compileDependencies``,
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+ ``interfaceCompileDependencies``, ``objectDependencies``, and
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+ ``orderDependencies`` fields.
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+
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+Generators
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+----------
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+
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+* The :generator:`Visual Studio 18 2026` generator was added. This is
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+ experimental and based on "Visual Studio 2026 Insiders" because this
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+ version of VS has not been released.
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+
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+* The :generator:`FASTBuild` generator was added.
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+
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+Platforms
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+---------
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+
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+* CMake now supports :ref:`Cross Compiling for Emscripten` with simple
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+ toolchain files.
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+
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+Command-Line
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+------------
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+
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+* The :manual:`cmake(1)` command-line tool now supports
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+ ``cmake -E copy_if_newer`` and ``cmake -E copy_directory_if_newer``
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+ subcommands to copy files based on timestamp comparison instead of
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+ content comparison. These commands copy files only if the source is
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+ newer than the destination, providing better performance for build
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+ systems compared to ``copy_if_different`` which compares file contents.
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+
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+Commands
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+--------
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+
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+* The :command:`cmake_language(TRACE)` command was added to enable or
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+ disable tracing during script execution.
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+
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+* The :command:`set(CACHE{<variable>}) <set(CACHE)>` and
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+ :command:`unset(CACHE{<variable>}) <unset(CACHE)>` commands were added to
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+ explicitly set and unset cache entries.
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+
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+* The :command:`string(REGEX QUOTE)` command was added to
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+ generate a regular expression exactly matching a string.
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+
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+Variables
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+---------
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+
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+* The :variable:`CMAKE_CXX_STDLIB_MODULES_JSON` variable was added to set
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+ the path to the ``import std`` metadata file for the standard library
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+ rather than using the compiler to discover its location.
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+
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+* The :variable:`CMAKE_INTERMEDIATE_DIR_STRATEGY` variable and corresponding
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+ :envvar:`CMAKE_INTERMEDIATE_DIR_STRATEGY` environment variable were added
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+ to change the strategy used to name intermediate directories used for
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+ object files and other associated target metadata.
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+
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+* The :variable:`CMAKE_AUTOGEN_INTERMEDIATE_DIR_STRATEGY` variable and
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+ corresponding :envvar:`CMAKE_AUTOGEN_INTERMEDIATE_DIR_STRATEGY` environment
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+ variable were added to change the strategy used to name intermediate
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+ directories used for :manual:`Qt Autogen <cmake-qt(7)>` files.
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+
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+* The :variable:`CMAKE_SKIP_LINTING` variable and corresponding
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+ :prop_tgt:`SKIP_LINTING` target property were added to tell the
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+ :ref:`Command-Line Build Tool Generators` to skip linting all
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+ sources in a target.
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+
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+Properties
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+----------
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+
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+* The :prop_sf:`INSTALL_OBJECT_NAME` source file property was added to
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+ control names of installed object files for specific compiled sources.
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+
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+* The :prop_tgt:`INSTALL_OBJECT_NAME_STRATEGY` target property was added
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+ to control the naming strategy for installed object files.
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+
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+* The :prop_tgt:`INSTALL_OBJECT_ONLY_USE_DESTINATION` target property was
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+ added to more precisely control the installation path for object files.
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+
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+* The :prop_sf:`JOB_POOL_COMPILE` source file property was added
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+ to assign individual source compilations to :prop_gbl:`JOB_POOLS`.
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+
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+* The :prop_sf:`OBJECT_NAME` source file property was added to control
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+ object names of compiled source files.
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+
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+* The :prop_tgt:`UNITY_BUILD_FILENAME_PREFIX` target property was added
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+ to control names of source files generated by :prop_tgt:`UNITY_BUILD`.
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+
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+Modules
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+-------
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+
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+* Nearly all find modules now provide a ``<PackageName>_VERSION`` result
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+ variable matching the casing of its module name. Existing variants such as
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+ ``<PackageName>_VERSION_STRING`` and uppercased ``<PACKAGENAME>_VERSION``
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+ are deprecated. See documentation of each find module for details.
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+
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+* The :module:`CheckTypeSize` module's :command:`check_type_size` command
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+ gained a new ``RESULT_VARIABLE`` keyword to customize the result variable
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+ name instead of the default ``HAVE_<size-var>``.
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+
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+* The :module:`ExternalProject` module's :command:`ExternalProject_Add`
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+ and :command:`ExternalProject_Add_Step` commands now provide options to set
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+ environment variables on the configure, build, install, and test steps.
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+
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+* The :module:`FindPython3`, :module:`FindPython2`, and :module:`FindPython`
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+ modules no longer make ``NumPy`` depend on ``Development.Module``.
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+ See policy :policy:`CMP0201`.
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+
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+* The :module:`GoogleTest` module's :command:`gtest_discover_tests()`
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+ command now sets the ``DEF_SOURCE_LINE`` test property for each
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+ discovered test if gtest supports the ``--gtest_output=json`` option.
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+ This test property is used by some IDEs to locate the source for each test.
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+
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+* The :module:`UseSWIG` module's :command:`swig_add_library` command gained a
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+ ``DEBUG_POSTFIX`` option to control the :prop_tgt:`DEBUG_POSTFIX` target
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+ property.
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+
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+Generator Expressions
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+---------------------
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+
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+* The :genex:`<LANG>_COMPILER_LINKER_ID <C_COMPILER_LINKER_ID>` and
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+ :genex:`<LANG>_COMPILER_LINKER_FRONTEND_VARIANT <C_COMPILER_LINKER_FRONTEND_VARIANT>`
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+ families of generator expressions were added to access the value of the
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+ associated :variable:`CMAKE_<LANG>_COMPILER_LINKER_ID` and
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+ :variable:`CMAKE_<LANG>_COMPILER_LINKER_FRONTEND_VARIANT` variables.
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+
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+* The :genex:`TARGET_FILE_BASE_NAME`, :genex:`TARGET_IMPORT_FILE_BASE_NAME`,
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+ :genex:`TARGET_LINKER_FILE_BASE_NAME`,
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+ :genex:`TARGET_LINKER_LIBRARY_FILE_BASE_NAME`,
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+ :genex:`TARGET_LINKER_IMPORT_FILE_BASE_NAME`, and
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+ :genex:`TARGET_PDB_FILE_BASE_NAME`
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+ generator expressions gained a ``POSTFIX`` option to control the inclusion
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+ of the :prop_tgt:`<CONFIG>_POSTFIX` target property as part of the base
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+ names of the corresponding files.
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+
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+* The :genex:`TARGET_INTERMEDIATE_DIR` generator expression was
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+ added to refer to a target's intermediate files directory in
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+ the build tree.
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+
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+CPack
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+-----
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+
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+* The :variable:`CPACK_PACKAGE_CHECKSUM` variable now supports multiple values.
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+
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+* The :cpack_gen:`CPack NSIS Generator` gained a
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+ :variable:`CPACK_NSIS_CRC_CHECK` variable for setting the ``CRCCheck``
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+ attribute.
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+
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+* The :cpack_gen:`CPack WIX Generator` gained a
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+ :variable:`CPACK_WIX_CAB_PER_COMPONENT` variable to enable one ``.cab``
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+ per component.
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+
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+Deprecated and Removed Features
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+===============================
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+
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+* The uppercased ``<PACKAGENAME>_FOUND`` result variables of find modules
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+ are now deprecated in favor of ``<PackageName>_FOUND`` result variables,
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+ where appropriate. See documentation of each find module for details.
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+
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+* The :module:`FindwxWidgets` module's result variable
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+ ``wxWidgets_USE_FILE`` is now deprecated in favor of including the
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+ :module:`UsewxWidgets` module directly.
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+
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+* The :generator:`Visual Studio 14 2015` generator is now deprecated
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+ and will be removed in a future version of CMake.
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+
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+Other Changes
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+=============
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+
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+* The :genex:`$<CONFIG:cfgs>` generator expression no longer matches multiple
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+ configurations. See policy :policy:`CMP0199`.
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+
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+* Selection of configuration and location of imported targets is now more
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+ consistent. See policy :policy:`CMP0200`.
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+
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+* The :variable:`CMAKE_PARENT_LIST_FILE` variable is no longer defined when
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+ processing a ``CMakeLists.txt`` file. See policy :policy:`CMP0198`.
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+
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+* For builds targeting the MSVC ABI, all generators now add the ``_MBCS``
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+ preprocessor definition when compiling sources unless ``_UNICODE`` or
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+ ``_SBCS`` is found. See policy :policy:`CMP0204`.
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+
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+* For builds targeting the MSVC ABI, all generators now add the ``_WINDLL``
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+ preprocessor definition when compiling sources in shared libraries.
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+ See policy :policy:`CMP0203`.
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