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418 lines
18 KiB
ReStructuredText
418 lines
18 KiB
ReStructuredText
CMake 3.8 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 3.7 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#
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^^
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* CMake learned to support ``CSharp`` (C#) as a first-class language that
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can be enabled via the :command:`project` and :command:`enable_language`
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commands. It is currently supported by the :ref:`Visual Studio Generators`
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for VS 2010 and above.
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C# assemblies and programs can be added just like common C++ targets using
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the :command:`add_library` and :command:`add_executable` commands.
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References between C# targets in the same source tree may be specified by
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:command:`target_link_libraries` like for C++. References to system or
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3rd-party assemblies may be specified by the target properties
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:prop_tgt:`VS_DOTNET_REFERENCE_<refname>` and
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:prop_tgt:`VS_DOTNET_REFERENCES`.
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* More fine tuning of C# targets may be done using target and source
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file properties. Specifically the target properties related to
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Visual Studio (``VS_*``) are worth a look (for setting toolset
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versions, root namespaces, assembly icons, ...).
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CUDA
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^^^^
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* CMake learned to support ``CUDA`` as a first-class language that can be
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enabled via the :command:`project` and :command:`enable_language` commands.
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* ``CUDA`` is currently supported by the :ref:`Makefile Generators`
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and the :generator:`Ninja` generator on Linux, macOS, and Windows.
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Support for the Visual Studio IDE is under development but not
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included in this release.
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* The NVIDIA CUDA Toolkit compiler (``nvcc``) is supported.
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C & C++
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^^^^^^^
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* The :manual:`Compile Features <cmake-compile-features(7)>` functionality
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now offers meta-features that request compiler modes for specific language
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standard levels (e.g. ``cxx_std_11``). See
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:prop_gbl:`CMAKE_C_KNOWN_FEATURES` and :prop_gbl:`CMAKE_CXX_KNOWN_FEATURES`.
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* The :manual:`Compile Features <cmake-compile-features(7)>` functionality
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is now aware of C++ 17. No specific features are yet enumerated besides
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the ``cxx_std_17`` meta-feature.
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* The :manual:`Compile Features <cmake-compile-features(7)>` functionality
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is now aware of the availability of C99 in gcc since version 3.4.
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Platforms
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---------
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* A new minimal platform file for ``Fuchsia`` was added.
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Generators
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----------
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* The :generator:`CodeBlocks` extra generator may now be used to
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generate with :generator:`NMake Makefiles JOM`.
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* The :ref:`Visual Studio Generators` for VS 2013 and above learned to
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support a ``host=x64`` option in the :variable:`CMAKE_GENERATOR_TOOLSET`
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value (e.g. via the :manual:`cmake(1)` ``-T`` option) to request use
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of a VS 64-bit toolchain on 64-bit hosts.
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* The :ref:`Visual Studio Generators` learned to treat files passed to
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:command:`target_link_libraries` whose names end in ``.targets``
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as MSBuild "targets" files to be imported into generated project files.
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Commands
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--------
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* The :command:`add_custom_command` and :command:`add_custom_target` commands
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learned the option ``COMMAND_EXPAND_LISTS`` which causes lists in the
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``COMMAND`` argument to be expanded, including lists created by generator
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expressions.
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* The :command:`execute_process` command gained an ``ENCODING`` option to
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specify on Windows which encoding is used for output from child process.
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* The :command:`math(EXPR)` command gained support for unary
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``+`` and ``-`` operators.
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* The :command:`source_group` command gained ``TREE`` and ``PREFIX``
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options to add groups following source tree directory structure.
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* The :command:`string(TIMESTAMP)` command learned to treat ``%%``
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as a way to encode plain ``%``.
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* The :command:`string(TIMESTAMP)` command will now honor the
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``SOURCE_DATE_EPOCH`` environment variable and use its value
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instead of the current time.
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* The :command:`try_compile` command source file signature gained new options
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to specify the language standard to use in the generated test project.
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* The :command:`try_compile` command source file signature now honors
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language standard variables like :variable:`CMAKE_CXX_STANDARD`.
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See policy :policy:`CMP0067`.
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Variables
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---------
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* A :variable:`CMAKE_CODELITE_USE_TARGETS` variable was added to tell the
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:generator:`CodeLite` extra generator to change the generated project
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to have target-centric organization.
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The ``build``, ``rebuild``, and ``clean`` operations within ``CodeLite``
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then work on a selected target rather than the whole workspace.
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(Note that the :generator:`Ninja` clean operation on a target
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includes its dependencies, though.)
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* The :variable:`CMAKE_SUBLIME_TEXT_2_ENV_SETTINGS` variable was added to
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tell the :generator:`Sublime Text 2` extra generator to place specified
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environment variables in the generated ``.sublime-project``.
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* The :variable:`CMAKE_SUBLIME_TEXT_2_EXCLUDE_BUILD_TREE` variable was added
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to tell the :generator:`Sublime Text 2` extra generator whether to exclude
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the build tree from the ``.sublime-project`` when it is inside the source
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tree.
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* A :variable:`CMAKE_VS_INCLUDE_PACKAGE_TO_DEFAULT_BUILD` variable was
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added to tell :ref:`Visual Studio Generators` for VS 2010 and above
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to include the ``PACKAGE`` target in the default build, similar to
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the existing :variable:`CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD`
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variable for the ``INSTALL`` target.
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Properties
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----------
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* A :prop_tgt:`BUILD_RPATH` target property and corresponding
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:variable:`CMAKE_BUILD_RPATH` variable were added to support custom
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``RPATH`` locations to be added to binaries in the build tree.
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* The :prop_sf:`COMPILE_FLAGS` source file property learned to support
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:manual:`generator expressions <cmake-generator-expressions(7)>`.
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* The :prop_tgt:`FRAMEWORK` target property may now also be applied to
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static libraries on Apple targets. It will result in a proper
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Framework but with a static library inside.
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* :ref:`Imported <Imported Targets>` :ref:`Interface Libraries` learned new
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:prop_tgt:`IMPORTED_LIBNAME` and :prop_tgt:`IMPORTED_LIBNAME_<CONFIG>`
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target properties to specify a link library name since interface libraries
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do not build their own library files.
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* A :prop_tgt:`<LANG>_CPPLINT` target property and supporting
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:variable:`CMAKE_<LANG>_CPPLINT` variable were introduced to tell
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the :ref:`Makefile Generators` and the :generator:`Ninja` generator to
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run the ``cpplint`` style checker along with the compiler for ``C`` and
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``CXX`` languages.
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* A :prop_tgt:`MANUALLY_ADDED_DEPENDENCIES` target property has been added.
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It provides a read-only list of dependencies that have been added with
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the :command:`add_dependencies` command.
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* The :prop_tgt:`MAP_IMPORTED_CONFIG_<CONFIG>` target property learned
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to interpret empty list elements as referring to the configuration-less
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imported location specified by :prop_tgt:`IMPORTED_LOCATION`.
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* The :prop_tgt:`NO_SYSTEM_FROM_IMPORTED` target property is now supported
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on :ref:`Imported <Imported Targets>` :ref:`Interface Libraries`.
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* New source file properties :prop_sf:`SKIP_AUTOMOC`, :prop_sf:`SKIP_AUTOUIC`,
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:prop_sf:`SKIP_AUTORCC`, and :prop_sf:`SKIP_AUTOGEN` were added to allow
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source files to be excluded from processing by :prop_tgt:`AUTOMOC`,
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:prop_tgt:`AUTOUIC`, and :prop_tgt:`AUTORCC` target properties.
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* A :prop_sf:`VS_COPY_TO_OUT_DIR` source file property was added to
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tell :ref:`Visual Studio Generators` for VS 2010 and above whether
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or not a file should e copied to the output directory.
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* A :prop_tgt:`VS_DEBUGGER_WORKING_DIRECTORY` target property was added
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to tell :ref:`Visual Studio Generators` for VS 2010 and above what
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debugger working directory should be set for the target.
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* A :prop_tgt:`VS_DOTNET_REFERENCES_COPY_LOCAL` target property was added
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to specify whether to copy referenced assemblies to the output directory.
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* A :prop_tgt:`VS_DOTNET_REFERENCE_<refname>` target property was added
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to tell :ref:`Visual Studio Generators` for VS 2010 and above to add
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a .NET reference with a given hint path.
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* A :prop_sf:`VS_INCLUDE_IN_VSIX` source file property was added to
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tell :ref:`Visual Studio Generators` for VS 2010 and above whether
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to include the file in a Visual Studio extension package.
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* A :prop_sf:`VS_RESOURCE_GENERATOR` source file property was added to
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give :ref:`Visual Studio Generators` for VS 2010 and above a setting
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for the resource generator (``C#`` only).
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* A :prop_tgt:`VS_USER_PROPS` target property was added to tell
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:ref:`Visual Studio Generators` for VS 2010 and above to use a
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custom MSBuild user ``.props`` file.
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* A :prop_gbl:`XCODE_EMIT_EFFECTIVE_PLATFORM_NAME` global property was
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added to tell the :generator:`Xcode` generator whether to emit the
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``EFFECTIVE_PLATFORM_NAME`` variable. This is useful when building
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with multiple SDKs like ``macosx`` and ``iphoneos`` in parallel.
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* New :prop_tgt:`XCODE_PRODUCT_TYPE` and :prop_tgt:`XCODE_EXPLICIT_FILE_TYPE`
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target properties were created to tell the :generator:`Xcode` generator
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to use custom values of the corresponding attributes for a target in the
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generated Xcode project.
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Modules
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-------
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* A :module:`CSharpUtilities` module was added to aid parameterization of
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Visual Studio C# targets. It provides functions to allow automated
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setting of source file properties to support Windows Forms, WPF/XAML or
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other technologies as needed.
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* The :module:`ExternalData` module learned to support multiple
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content links for one data file using different hashes, e.g.
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``img.png.sha256`` and ``img.png.sha1``. This allows objects
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to be fetched from sources indexed by different hash algorithms.
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* The :module:`ExternalProject` module gained the ``GIT_PROGRESS`` option to
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force Git to show progress when cloning repositories.
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* The :module:`ExternalProject` module gained a ``GIT_CONFIG`` option
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to pass ``--config`` options to Git when cloning repositories.
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* The :module:`FeatureSummary` module :command:`feature_summary` command now
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accepts a new ``QUIET_ON_EMPTY`` option that suppresses the output when
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the list of packages that belong to the selected category is empty.
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* The :module:`FeatureSummary` module :command:`add_feature_info` command
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now accepts lists of dependencies for deciding whether a feature is enabled
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or not.
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* The package types accepted by the :module:`FeatureSummary` module can now
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be tweaked by changing the :variable:`FeatureSummary_PKG_TYPES`,
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:variable:`FeatureSummary_REQUIRED_PKG_TYPES` and
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:variable:`FeatureSummary_DEFAULT_PKG_TYPE` global properties.
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* The :module:`FindOpenGL` module now provides imported targets
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``OpenGL::GL`` and ``OpenGL::GLU`` when the libraries are found.
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* The :module:`UseSWIG` module gained a ``swig_add_library`` command
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to give more flexibility over the old ``swig_add_module`` command.
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* The :module:`UseSWIG` module ``swig_add_source_to_module`` command
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learned a new ``SWIG_OUTFILE_DIR`` option to control the output
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file location (``swig -o``).
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* The :module:`WriteCompilerDetectionHeader` module gained the
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``ALLOW_UNKNOWN_COMPILERS`` and ``ALLOW_UNKNOWN_COMPILER_VERSIONS`` options
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that allow creation of headers that will work also with unknown or old
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compilers by simply assuming they do not support any of the requested
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features.
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CTest
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-----
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* The :command:`ctest_memcheck` command gained a ``DEFECT_COUNT <var>``
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option to capture the number of memory defects detected.
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* The :command:`ctest_memcheck` command learned to read the location of
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suppressions files for sanitizers from the
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:variable:`CTEST_MEMORYCHECK_SUPPRESSIONS_FILE` variable.
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* The :command:`ctest_memcheck` command learned to support ``LeakSanitizer``
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independently from ``AddressSanitizer``.
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* The :command:`ctest_update` command ``CDASH_UPLOAD`` signature was taught
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to honor the ``RETRY_COUNT``, ``RETRY_DELAY``, and ``QUIET`` options.
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CPack
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-----
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* The :module:`CPackIFWConfigureFile` module was added to define a new
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:command:`cpack_ifw_configure_file` command to configure file templates
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prepared in QtIFW/SDK/Creator style.
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* The :module:`CPackIFW` module :command:`cpack_ifw_configure_component` and
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:command:`cpack_ifw_configure_component_group` commands gained a new
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``DEFAULT``, ``VIRTUAL``, ``FORCED_INSTALLATION``, ``REQUIRES_ADMIN_RIGHTS``,
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``DISPLAY_NAME``, ``UPDATE_TEXT``, ``DESCRIPTION``, ``RELEASE_DATE``,
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``AUTO_DEPEND_ON`` and ``TRANSLATIONS`` options to more specific
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configuration.
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* The :module:`CPackIFW` module :command:`cpack_ifw_configure_component`
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command gained a new ``DEPENDENCIES`` alias for ``DEPENDS`` option.
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* The :module:`CPackIFW` module :command:`cpack_ifw_configure_component_group`
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command gained a new ``DEPENDS`` option. The ``DEPENDENCIES`` alias also
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added.
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* The :module:`CPackIFW` module :command:`cpack_ifw_configure_component` and
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:command:`cpack_ifw_configure_component_group` commands ``PRIORITY``
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option now is deprecated and will be removed in a future version of CMake.
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Please use new ``SORTING_PRIORITY`` option instead.
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* The :cpack_gen:`CPack IFW Generator` gained new
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:variable:`CPACK_IFW_PACKAGE_WATERMARK`,
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:variable:`CPACK_IFW_PACKAGE_BANNER`,
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:variable:`CPACK_IFW_PACKAGE_BACKGROUND`,
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:variable:`CPACK_IFW_PACKAGE_WIZARD_STYLE`,
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:variable:`CPACK_IFW_PACKAGE_WIZARD_DEFAULT_WIDTH`,
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:variable:`CPACK_IFW_PACKAGE_WIZARD_DEFAULT_HEIGHT`, and
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:variable:`CPACK_IFW_PACKAGE_TITLE_COLOR`
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variables to customize a QtIFW installer look.
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* The :cpack_gen:`CPack productbuild Generator` gained options to sign packages.
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See the variables :variable:`CPACK_PRODUCTBUILD_IDENTITY_NAME`,
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:variable:`CPACK_PRODUCTBUILD_KEYCHAIN_PATH`,
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:variable:`CPACK_PKGBUILD_IDENTITY_NAME`, and
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:variable:`CPACK_PKGBUILD_KEYCHAIN_PATH`.
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* The :cpack_gen:`CPack RPM Generator` learned to omit tags that are not
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supported by provided ``rpmbuild`` tool. If unsupported tags are set they
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are ignored and a developer warning is printed out.
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* The :cpack_gen:`CPack RPM Generator` learned to generate main component
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package which forces generation of a rpm for defined component without
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component suffix in filename and package name.
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See :variable:`CPACK_RPM_MAIN_COMPONENT` variable.
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* The :cpack_gen:`CPack RPM Generator` learned to generate a single
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``debuginfo`` package on demand even if components packaging is used.
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See :variable:`CPACK_RPM_DEBUGINFO_SINGLE_PACKAGE` variable.
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* The :cpack_gen:`CPack RPM Generator` learned to support
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multiple directives per file when using
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:variable:`CPACK_RPM_USER_FILELIST` variable.
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Other
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-----
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* CMake functionality using cryptographic hashes now supports SHA-3 algorithms.
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* A new generator expression ``$<IF:cond,true-value,false-value>`` was added.
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It resolves to the true-value if the condition is ``1`` and resolves to
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the false-value if the condition is ``0``.
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Deprecated and Removed Features
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===============================
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* The :module:`FeatureSummary` module commands :command:`set_package_info`,
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:command:`set_feature_info`, :command:`print_enabled_features`, and
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:command:`print_disabled_features` are now deprecated.
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* The :module:`UseSWIG` module ``swig_add_module`` command is now
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deprecated in favor of ``swig_add_library``.
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Other Changes
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=============
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* If a command specified by the :prop_tgt:`<LANG>_CLANG_TIDY` target property
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returns non-zero at build time this is now treated as an error instead of
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silently ignored.
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* The :command:`ctest_memcheck` command no longer automatically adds
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``leak_check=1`` to the options used by ``AddressSanitizer``. The default
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behavior of ``AddressSanitizer`` is to run `LeakSanitizer` to check leaks
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unless ``leak_check=0``.
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* The :command:`ctest_memcheck` command was fixed to correctly append extra
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sanitizer options read from the
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:variable:`CTEST_MEMORYCHECK_SANITIZER_OPTIONS` variable to the environment
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variables used internally by the sanitizers.
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* The :module:`FeatureSummary` module :command:`set_package_properties`
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command no longer forces the package type to ``OPTIONAL`` when the type
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is not explicitly set.
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* The :manual:`Compile Features <cmake-compile-features(7)>` functionality
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is now aware of features supported by Intel C++ compilers versions 12.1
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through 17.0 on UNIX and Windows platforms.
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* Calls to the :module:`FindPkgConfig` module :command:`pkg_check_modules`
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command following a successful call learned to re-evaluate the cached values
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for a given prefix after changes to the parameters to the command for that
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prefix.
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* When using :prop_tgt:`AUTOMOC` or :prop_tgt:`AUTOUIC`, generated
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``moc_*``, ``*.moc`` and ``ui_*`` are placed in the
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``<CMAKE_CURRENT_BINARY_DIR>/<TARGETNAME>_autogen/include`` directory which
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is automatically added to the target's :prop_tgt:`INCLUDE_DIRECTORIES`.
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It is therefore not necessary anymore to have
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:variable:`CMAKE_CURRENT_BINARY_DIR` in the target's
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:prop_tgt:`INCLUDE_DIRECTORIES`.
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* The :generator:`Sublime Text 2` generator no longer runs the native
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build command (e.g. ``ninja`` or ``make``) with verbose build output
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enabled.
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* The :command:`try_compile` command source file signature now
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honors the :variable:`CMAKE_WARN_DEPRECATED` variable value
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in the generated test project.
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* The :ref:`Visual Studio Generators` for VS 2010 and above now place
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per-source file flags after target-wide flags when they are classified
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as raw flags with no project file setting (``AdditionalOptions``).
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This behavior is more consistent with the ordering of flags produced
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by other generators, and allows flags on more-specific properties
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(per-source) to override those on more general ones (per-target).
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* The precompiled Windows binary MSI package provided on ``cmake.org`` now
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records the installation directory in the Windows Registry under the key
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``HKLM\Software\Kitware\CMake`` with a value named ``InstallDir``.
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