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CMake 3.26 Release Notes
************************
.. only:: html
.. contents::
Changes made since CMake 3.25 include the following.
New Features
============
Languages
---------
* The ``ASM_MARMASM`` language was added to support the
Microsoft ARM assembler language.
Command-Line
------------
* The :option:`cmake -E copy <cmake-E copy>` command-line tool now
supports a ``-t`` argument.
* The :option:`cmake -E copy_directory_if_different
<cmake-E copy_directory_if_different>` command-line tool was added.
Configure Log
-------------
* CMake now writes a YAML log of configure-time checks to
``CMakeFiles/CMakeConfigureLog.yaml`` under the top of the build tree.
See the :manual:`cmake-configure-log(7)` manual.
File-Based API
--------------
* The :manual:`cmake-file-api(7)` "codemodel" version 2 ``version`` field has
been updated to 2.5.
* The :manual:`cmake-file-api(7)` "codemodel" version 2 "target" object
gained a new ``fileSets`` field and associated ``fileSetIndex``
field to ``sources`` objects.
* The :manual:`cmake-file-api(7)` "codemodel" version 2 "directory"
object ``installers`` field gained a new ``cxxModuleBmi`` installer type
and an associated ``cxxModuleBmiTarget`` field.
* The :manual:`cmake-file-api(7)` gained a new "configureLog" object kind
that enables stable access to the :manual:`cmake-configure-log(7)`.
Commands
--------
* The :command:`add_custom_command` and :command:`add_custom_target` commands
now support :manual:`generator expressions <cmake-generator-expressions(7)>`
in their ``COMMENT`` option.
* The :command:`message` command gained a ``CONFIGURE_LOG`` mode to
record an entry in the :manual:`cmake-configure-log(7)`.
* The :command:`string(TIMESTAMP)` and :command:`file(TIMESTAMP)` commands
now support the ``%z`` and ``%Z`` specifiers for the time zone.
* The :command:`try_compile` and :command:`try_run` commands gained
a ``LOG_DESCRIPTION`` option specifying text to be recorded in the
:manual:`cmake-configure-log(7)`.
* The :command:`try_compile` and :command:`try_run` commands gained a
``NO_LOG`` option to skip recording a :manual:`cmake-configure-log(7)`
entry.
Variables
---------
* The :variable:`CMAKE_<LANG>_COMPILER_FRONTEND_VARIANT` variable is now
set for ``GNU``, ``MSVC``, and ``AppleClang`` compilers that have only
one frontend variant.
* A :variable:`CMAKE_VS_VERSION_BUILD_NUMBER` variable is now set by
:ref:`Visual Studio Generators` for VS 2017 and above to report the
four-component Visual Studio version number.
Properties
----------
* The :prop_tgt:`<LANG>_CLANG_TIDY_EXPORT_FIXES_DIR` target property was
added to allow the ``clang-tidy`` tool to export its suggested fixes to a
set of ``.yaml`` files. A new
:variable:`CMAKE_<LANG>_CLANG_TIDY_EXPORT_FIXES_DIR` variable was created to
initialize this property.
* The :prop_tgt:`XCODE_EMBED_EXTENSIONKIT_EXTENSIONS <XCODE_EMBED_<type>>`
target property was added to tell the :generator:`Xcode` generator to embed
ExtensionKit-based extensions such as extensions using the Background
Assets framework. Aspects of the embedding can be customized with:
* :prop_tgt:`XCODE_EMBED_EXTENSIONKIT_EXTENSIONS_PATH <XCODE_EMBED_<type>>`
* :prop_tgt:`XCODE_EMBED_EXTENSIONKIT_EXTENSIONS_CODE_SIGN_ON_COPY <XCODE_EMBED_<type>_CODE_SIGN_ON_COPY>`
* :prop_tgt:`XCODE_EMBED_EXTENSIONKIT_EXTENSIONS_REMOVE_HEADERS_ON_COPY <XCODE_EMBED_<type>_REMOVE_HEADERS_ON_COPY>`
Modules
-------
* The :module:`ExternalProject` module's :command:`ExternalProject_Add` command
gained an ``INSTALL_BYPRODUCTS`` option to specify files generated by the
``install`` step.
* The :module:`FindCUDAToolkit` module:
* gained support for the ``sbsa-linux`` cross compilation target, and
* now provides an imported target for ``nvrtc_static``, if found.
* The :module:`FindImageMagick` module now provides imported targets.
* The :module:`FindPython3` and :module:`FindPython` modules gained
support for the `Stable Application Binary Interface`_.
* The :module:`UseSWIG` module gained support for the ``perl5`` language.
.. _`Stable Application Binary Interface`: https://docs.python.org/3/c-api/stable.html
Generator Expressions
---------------------
* The :genex:`$<BUILD_LOCAL_INTERFACE:...>` generator expression was added to
prevent usage requirements from being exported to dependent projects.
CTest
-----
* The :envvar:`CTEST_NO_TESTS_ACTION` environment variable was added to
provide a default value for the
:option:`--no-tests=\<action\> <ctest --no-tests>` command line
argument of :manual:`ctest(1)`.
Deprecated and Removed Features
===============================
* The ``CMakeFiles/CMakeOutput.log`` and ``CMakeFiles/CMakeError.log``
files are no longer populated by CMake's built-in modules.
:manual:`cmake(1)` no longer suggests looking at them after a
``CMake Error`` occurs. Information previously logged to those
files is instead logged to the :manual:`cmake-configure-log(7)`.
* On CYGWIN, the undocumented ``CMAKE_LEGACY_CYGWIN_WIN32`` mode for
compatibility with CMake versions older than 2.8.4 has been removed.
Other Changes
=============
* :ref:`Language Standard Flags`, such as ``-std=c++11``, when generated due
to :command:`target_compile_features` or :variable:`CMAKE_<LANG>_STANDARD`,
are now placed before flags added by :command:`target_compile_options`,
rather than after them.
* For all ``COMPILE_DEFINITIONS`` properties, any leading ``-D`` on an item
is removed whether or not it was specified by a generator expression.
* The ``compile_commands.json`` database enabled by
:variable:`CMAKE_EXPORT_COMPILE_COMMANDS` now provides the ``output``
field in the compile commands objects. This allows multi-config
generators, such as the :generator:`Ninja Multi-Config` generator,
to provide the compile commands for all configurations.
* The :prop_gbl:`USE_FOLDERS` global property is treated as ``ON`` by default.
See policy :policy:`CMP0143`.
* The top-level :command:`project` call will now emit an author warning if the
documented command order in relation to :command:`cmake_minimum_required` is
not respected.
* The :option:`cmake --trace` option now follows :command:`try_compile` and
:command:`try_run` invocations.
Updates
=======
Changes made since CMake 3.26.0 include the following.
3.26.1, 3.26.2, 3.26.3, 3.26.4, 3.26.5
--------------------------------------
* These versions made no changes to documented features or interfaces.
Some implementation updates were made to support ecosystem changes
and/or fix regressions.
3.26.6
------
* The :manual:`cmake-file-api(7)` "codemodel" version 2 "target" object
``fileSets`` field was introduced by CMake 3.26.0 with entries of its
``baseDirectories`` member incorrectly expressed as absolute paths
even if they are inside the top-level source directory. This has
been fixed. Clients must be updated to expect relative paths under
the top-level source directory.
|
