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CMake 3.22 Release Notes
************************
.. only:: html
.. contents::
Changes made since CMake 3.21 include the following.
* The :module:`CMakeDependentOption` module :command:`cmake_dependent_option`
macro now supports full :ref:`Condition Syntax`.
See policy :policy:`CMP0127`.
* The :envvar:`CMAKE_INSTALL_MODE` environment variable was added to
allow users to override the default file-copying behavior of
:command:`install` and :command:`file(INSTALL)` into creating
symbolic links. This can aid in lowering storage space requirements
and avoiding redundancy.
* The :command:`file(INSTALL)` can now be affected / modified by the
:envvar:`CMAKE_INSTALL_MODE` environment variable causing installation
of symbolic links instead of copying of files.
* The :command:`install` can now be affected / modified by the
:envvar:`CMAKE_INSTALL_MODE` environment variable causing installation
of symbolic links instead of copying of files.
* The :manual:`Compile Features <cmake-compile-features(7)>` functionality now
correctly disables or enables compiler extensions when no standard level is
specified and avoids unnecessarily adding language standard flags if the
requested settings match the compiler's defaults. See :policy:`CMP0128`.
* :prop_tgt:`<LANG>_EXTENSIONS` is initialized to
:variable:`CMAKE_<LANG>_EXTENSIONS_DEFAULT`. See :policy:`CMP0128`.
* The :cpack_gen:`CPack DEB Generator` gained the
option to set :variable:`CPACK_DEBIAN_COMPRESSION_TYPE` to zstd,
which enables Zstandard compression for deb packages.
* The :cpack_gen:`CPack RPM Generator` gained the
:variable:`CPACK_RPM_REQUIRES_EXCLUDE_FROM` option avoid scanning
specific paths for dependencies.
* :manual:`ctest(1)` learned to be able to modify the environment for a test
through the :prop_test:`ENVIRONMENT_MODIFICATION` property. This is allows
for updates to environment variables based on the environment present at
test time.
* The :command:`ctest_memcheck` command now also generates a
`DynamicAnalysis-Test.xml` file which may be used to submit test results to
CDash.
* :manual:`ctest(1)` learned to recognize labels attached to a test at run time.
Previously it was only possible to attach labels to tests at configure time
by using the :prop_test:`LABELS` test property.
See :ref:`Additional Test Measurements` for more information.
* The :envvar:`CMAKE_BUILD_TYPE` environment variable was added to
provide a default value for the :variable:`CMAKE_BUILD_TYPE` variable.
* The :envvar:`CMAKE_CONFIGURATION_TYPES` environment variable was added to
provide a default value for the :variable:`CMAKE_CONFIGURATION_TYPES`
variable.
* The :module:`FetchContent` module now passes through the
:variable:`CMAKE_TLS_VERIFY`, :variable:`CMAKE_TLS_CAINFO`,
:variable:`CMAKE_NETRC` and :variable:`CMAKE_NETRC_FILE` variables (when
defined) to the underlying :module:`ExternalProject` sub-build.
Previously, those variables were silently ignored by :module:`FetchContent`.
* The :module:`FindBLAS` and :module:`FindLAPACK` modules gained
a ``BLA_SIZEOF_INTEGER`` option to find a BLAS/LAPACK whose ABI
uses a specific integer size.
* The :module:`FindJasper` module now provides an imported target.
* The :module:`FindMatlab` module now provides imported targets.
* The :variable:`CMAKE_REQUIRE_FIND_PACKAGE_<PackageName>` variable was added
to turn a non-REQUIRED :command:`find_package` call into a REQUIRED one.
* The :module:`FindPkgConfig` module gained a :variable:`PKG_CONFIG_ARGN`
variable to specify arguments to ``pkg-config`` calls.
* The :module:`GoogleTest` module :command:`gtest_discover_tests`
function gained a ``TEST_FILTER`` option to filter tests using
``--gtest_filter`` during test discovery.
* Configuration for :prop_tgt:`LINK_WHAT_YOU_USE` feature is now controlled by
``CMake`` variables and only active for ``ELF`` platforms.
* The MSVC compilers learned to pass the ``-external:I`` flag for system
includes when using the :generator:`Ninja` and :generator:`NMake Makefiles`
generators. This became available as of Visual Studio 16.10 (toolchain
version 14.29.30037).
* The :ref:`Ninja Generators` now implement the ``edit_cache`` target
using :manual:`ccmake(1)` if available.
* The :cpack_gen:`CPack NSIS Generator` gained a new variable
:variable:`CPACK_NSIS_IGNORE_LICENSE_PAGE` to ignore the
license page in the installer.
* The :cpack_gen:`CPack NSIS Generator` now requires NSIS 3.03 or later.
* The :command:`cmake_host_system_information` command query operating system
identification `variables <https://www.freedesktop.org/software/systemd/man/os-release.html>`_
from the :file:`/etc/os-release` file.
* The :command:`string(TIMESTAMP)` command now supports the ``%V``
specifier for ISO 8601 week numbers.
* :command:`target_compile_features` learned to ignored features for languages that
aren't enabled.
* :module:`UseSWIG` module gained the capability, for
:ref:`Visual Studio Generators` to use `swig` tool to generate implicit
dependencies.
* The :generator:`Visual Studio 10 2010` generator is now deprecated
and will be removed in a future version of CMake.
* The :prop_sf:`VS_SETTINGS` source file property is now supported for
all source file types. Previously it worked only for non-built sources.
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