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283 lines
11 KiB
ReStructuredText
283 lines
11 KiB
ReStructuredText
CMake 3.10 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 3.9 include the following.
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New Features
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============
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Platforms
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---------
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* The `flang`_ Fortran compiler is now supported, with compiler id ``Flang``.
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* A new minimal platform file for ``Midipix`` was added.
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* Support for the MSVC ARM64 architecture was added.
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Visual Studio 2017 Update 4 and above offer an ARM64 toolchain.
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* Support for the IAR ARM Compiler was improved.
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.. _`flang`: https://github.com/flang-compiler/flang
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Generators
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----------
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* The :ref:`Makefile Generators` and the :generator:`Ninja` generator learned
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to add compiler launcher tools like ccache along with the compiler for the
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``CUDA`` language (``C`` and ``CXX`` were supported previously). See the
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:variable:`CMAKE_<LANG>_COMPILER_LAUNCHER` variable and
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:prop_tgt:`<LANG>_COMPILER_LAUNCHER` target property for details.
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* The :generator:`CodeBlocks` extra generator learned to optionally exclude
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files from outside the project root directory from the generated project.
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See the :variable:`CMAKE_CODEBLOCKS_EXCLUDE_EXTERNAL_FILES` variable.
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Commands
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--------
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* The :command:`cmake_host_system_information` command learned more keys
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to get information about the processor capabilities and the host OS
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version.
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* The :command:`configure_file` command learned to support indented
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``# cmakedefine`` and ``# cmakedefine01``. Spaces and/or tabs between
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the ``#`` character and the ``cmakedefine``/``cmakedefine01`` words
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are now understood and preserved in the output.
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* The :command:`execute_process` command gained a ``RESULTS_VARIABLE``
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option to collect a list of results from all children in a pipeline
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of processes when multiple ``COMMAND`` arguments are given.
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* The :command:`include_guard` command was introduced to allow guarding
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CMake scripts from being included more than once. The command supports
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``DIRECTORY`` and ``GLOBAL`` options to adjust the corresponding include guard
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scope. If no options given, include guard is similar to basic variable-based
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check.
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* The :command:`string` command learned a new ``PREPEND`` subcommand.
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* The :command:`string(TIMESTAMP)` command now supports ``%A``
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for full weekday name and ``%B`` for full month name.
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Variables
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---------
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* A :variable:`CMAKE_DIRECTORY_LABELS` variable was added to specify
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labels for all tests in a directory.
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Properties
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----------
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* A :prop_tgt:`<LANG>_CPPCHECK` target property and supporting
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:variable:`CMAKE_<LANG>_CPPCHECK` variable were introduced to tell
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the :ref:`Makefile Generators` and the :generator:`Ninja` generator to
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run ``cppcheck`` with the compiler for ``C`` and ``CXX`` languages.
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* A :prop_dir:`LABELS` directory property was added to specify labels
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for all targets and tests in a directory.
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* A :prop_dir:`TEST_INCLUDE_FILES` directory property was added to
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list any number of files to be included when running tests with
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:manual:`ctest(1)`. This generalizes the :prop_dir:`TEST_INCLUDE_FILE`
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property.
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* The :prop_tgt:`VS_DOTNET_REFERENCEPROP_<refname>_TAG_<tagname>`
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target property was added to support custom XML tags for reference
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assemblies in C# targets.
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* Source file properties :prop_sf:`VS_SHADER_OUTPUT_HEADER_FILE` and
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:prop_sf:`VS_SHADER_VARIABLE_NAME` have been added to specify more
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details of ``.hlsl`` sources with :ref:`Visual Studio Generators`.
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Modules
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-------
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* The :module:`FindCurses` module gained a ``CURSES_NEED_WIDE`` option
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to request the wide-character variant.
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* The :module:`FindEXPAT` module now provides imported targets.
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* The :module:`FindFreetype` module now provides imported targets.
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* :module:`FindMPI` gained a number of new features, including:
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* Language-specific components have been added to the module.
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* Many more MPI environments are now supported.
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* The environmental support for Fortran has been improved.
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* A user now has fine-grained control over the MPI selection process,
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including passing custom parameters to the MPI compiler.
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* The version of the implemented MPI standard is now being exposed.
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* MPI-2 C++ bindings can now be detected and also suppressed if so desired.
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* The available Fortran bindings are now being detected and verified.
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* Various MPI-3 information can be requested, including the library version
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and Fortran capabilities of the individual bindings.
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* Statically linked MPI implementations are supported.
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* A :module:`FindOpenACC` module was added to detect compiler support
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for OpenACC. Currently only supports PGI, GNU and Cray compilers.
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* The :module:`FindOpenGL` module gained support for GLVND on Linux.
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* The :module:`FindOpenMP` module gained support for
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language-specific components.
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* A :module:`FindPatch` module was added to find the ``patch``
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command-line executable.
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* The :module:`FindProtobuf` module :command:`protobuf_generate_cpp` command
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gained a ``DESCRIPTORS`` option to generate descriptor files.
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* The :module:`GoogleTest` module gained a new command
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:command:`gtest_discover_tests` implementing dynamic (build-time) test
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discovery. Unlike the source parsing approach, dynamic discovery executes
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the test (in 'list available tests' mode) at build time to discover tests.
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This is robust against unusual ways of labeling tests, provides much better
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support for advanced features such as parameterized tests, and does not
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require re-running CMake to discover added or removed tests within a test
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executable. Note that a breaking change was made in CMake 3.10.3 to address
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an ambiguity of the ``TIMEOUT`` keyword (see :ref:`Release Notes 3.10.3`).
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* The :module:`InstallRequiredSystemLibraries` module gained support
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for installing Intel compiler runtimes.
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Autogen
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-------
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* When using :prop_tgt:`AUTOMOC` or :prop_tgt:`AUTOUIC` with a
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multi configuration generator (e.g. :generator:`Xcode`),
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included ``*.moc``, ``moc_*.cpp`` and ``ui_*.h`` files are generated in
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``<AUTOGEN_BUILD_DIR>/include_<CONFIG>`` instead of
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``<AUTOGEN_BUILD_DIR>/include``.
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* When using :prop_tgt:`AUTOMOC` or :prop_tgt:`AUTOUIC`,
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source files that are :prop_sf:`GENERATED` will be processed as well.
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They were ignored by :prop_tgt:`AUTOMOC` and :prop_tgt:`AUTOUIC`
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in earlier releases.
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See policy :policy:`CMP0071`.
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* When using :prop_tgt:`AUTOMOC`, CMake searches for the strings ``Q_OBJECT``,
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``Q_GADGET`` or ``Q_NAMESPACE`` in a source file to determine if it needs
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to be ``moc`` processed. The new :variable:`CMAKE_AUTOMOC_MACRO_NAMES`
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variable and :prop_tgt:`AUTOMOC_MACRO_NAMES` target property may be set
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to register additional strings (macro names) to search for.
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* When using :prop_tgt:`AUTOMOC`, the new
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:variable:`CMAKE_AUTOMOC_COMPILER_PREDEFINES` variable and
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:prop_tgt:`AUTOMOC_COMPILER_PREDEFINES` target property specify whether
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to enable or disable the generation of the compiler pre definitions file
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``moc_predefs.h``.
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CTest
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-----
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* A :variable:`CTEST_LABELS_FOR_SUBPROJECTS` CTest module variable and CTest
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script variable were added to specify a list of labels that should be
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treated as subprojects by CDash. To use this value in both the CTest module
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and the ctest command line :ref:`Dashboard Client` mode (e.g. ``ctest -S``)
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set it in the ``CTestConfig.cmake`` config file.
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CPack
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-----
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* A :cpack_gen:`CPack FreeBSD Generator` was added for FreeBSD ``pkg(8)``.
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* The :cpack_gen:`CPack DEB Generator` was enabled on Windows. While not
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fully featured (due to the lack of external UNIX tools) this will allow
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building basic cross-platform Debian packages.
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* The :cpack_gen:`CPack DEB Generator` learned to set package release
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version in ``Version`` info property.
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See the :variable:`CPACK_DEBIAN_PACKAGE_RELEASE` variable.
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* The :cpack_gen:`CPack DEB Generator` learned more strict package
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version checking that complies with Debian rules.
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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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``REPLACES`` and ``CHECKABLE`` options.
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* The :cpack_gen:`CPack IFW Generator` gained new
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:variable:`CPACK_IFW_PACKAGE_FILE_EXTENSION` variable to customize
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target binary format.
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* The :cpack_gen:`CPack IFW Generator` gained new
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:variable:`CPACK_IFW_REPOSITORIES_DIRECTORIES` variable to specify
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additional repositories dirs that will be used to resolve and
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repack dependent components. This feature is only available when
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using QtIFW 3.1 or later.
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* The :cpack_gen:`CPack RPM Generator` and :cpack_gen:`CPack DEB Generator`
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learned to set the package epoch version.
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See :variable:`CPACK_RPM_PACKAGE_EPOCH` and
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:variable:`CPACK_DEBIAN_PACKAGE_EPOCH` variables.
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Other
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-----
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* The :manual:`cmake(1)` ``-E`` mode gained support for ``sha1sum``,
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``sha224sum``, ``sha256sum``, ``sha384sum``, and ``sha512sum``.
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* The graphviz output now distinguishes among the different dependency types
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``PUBLIC``, ``PRIVATE`` and ``INTERFACE`` and represents them in the output
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graph as solid, dashed and dotted edges.
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Deprecated and Removed Features
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===============================
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* Support for building CMake itself with C++98 compilers was dropped.
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CMake is now implemented using C++11.
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* Support for building CMake on HP-UX has been dropped pending better
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support for C++11 and a port of libuv. See `CMake Issue 17137`_.
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Use CMake 3.9 or lower instead for HP-UX support.
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.. _`CMake Issue 17137`: https://gitlab.kitware.com/cmake/cmake/-/issues/17137
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Other Changes
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=============
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* On FreeBSD the C++ compiler named ``c++`` is now the preferred default.
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* The :command:`file(GENERATE)` command now interprets relative paths
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given to its ``OUTPUT`` and ``INPUT`` arguments with respect to the
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caller's current binary and source directories, respectively.
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See policy :policy:`CMP0070`.
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* The :command:`get_filename_component` ``PROGRAM`` mode semantics
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have been revised to not tolerate unquoted spaces in the path
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to the program while also accepting arguments. While technically
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incompatible with the old behavior, it is expected that behavior
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under typical use cases with properly-quoted command-lines has
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not changed.
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Updates
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=======
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Changes made since CMake 3.10.0 include the following.
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3.10.1
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------
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* The :manual:`cmake-server(7)` ``codemodel`` response ``crossReferences``
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field added by 3.10.0 has been dropped due to excessive memory usage.
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Another approach will be needed to provide backtrace information.
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.. _`Release Notes 3.10.3`:
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3.10.3
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------
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* CMake 3.10.1 added a ``TIMEOUT`` option to :command:`gtest_discover_tests`
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from the :module:`GoogleTest` module. That keyword clashed with the
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``TIMEOUT`` test property, which is one of the common properties that
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would be set with the command's ``PROPERTIES`` keyword, usually leading
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to legal but unintended behavior. The keyword was changed to
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``DISCOVERY_TIMEOUT`` in CMake 3.10.3 to address this problem. The
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ambiguous behavior of the :command:`gtest_discover_tests` command's
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``TIMEOUT`` keyword in 3.10.1 and 3.10.2 has not been preserved.
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