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288 lines
11 KiB
ReStructuredText
288 lines
11 KiB
ReStructuredText
CMake 3.3 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 3.2 include the following.
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New Features
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============
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Generators
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----------
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* The :ref:`Makefile Generators` now add ``.DELETE_ON_ERROR`` to the
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makefiles that contain the actual build rules for files on disk.
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This tells GNU make to remove rule outputs when their recipe
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modifies an output but fails.
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* The :ref:`Visual Studio Generators` learned to support ``.xaml``
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source files and automatically associate them with corresponding
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``.h`` and ``.cpp`` sources.
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* A new experimental :generator:`Green Hills MULTI` generator was
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added on Windows. `Green Hills MULTI`_ is an IDE for embedded
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real-time systems.
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.. _`Green Hills MULTI`: https://www.ghs.com/products/MULTI_IDE.html
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Commands
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--------
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* The :command:`add_dependencies` command learned to allow dependencies
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to be added to :ref:`interface libraries <Interface Libraries>`.
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Dependencies added to an interface library are followed transitively
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in its place since the target itself does not build.
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* The :command:`execute_process` command learned to support specifying
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the same file for ``OUTPUT_FILE`` and ``ERROR_FILE``.
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* The :command:`file(GLOB)` and :command:`file(GLOB_RECURSE)` commands
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learned a new ``LIST_DIRECTORIES <bool>`` option to specify whether
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the glob result should include directories.
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* The :command:`find_library`, :command:`find_path`, and :command:`find_file`
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commands now search in installation prefixes derived from the ``PATH``
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environment variable.
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* The :command:`if` command learned a new ``IN_LIST`` operator that
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evaluates to true if a given element is contained in a named list.
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* The :command:`install(EXPORT)` and :command:`export()` commands
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learned to export targets that populate the :prop_tgt:`INTERFACE_SOURCES`
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target property.
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* The :command:`install(TARGETS)` command learned to support
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generator expressions in the ``DESTINATION`` value.
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Variables
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---------
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* The version of some Fortran compilers is now detected and stored in the
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:variable:`CMAKE_Fortran_COMPILER_VERSION <CMAKE_<LANG>_COMPILER_VERSION>`
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variable.
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* The :ref:`Visual Studio Generators` learned a new
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:variable:`CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD` option
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to put the ``INSTALL`` target in the default build of a
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solution (``.sln``) file.
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Properties
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----------
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* A :prop_tgt:`CROSSCOMPILING_EMULATOR` target property and supporting
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:variable:`CMAKE_CROSSCOMPILING_EMULATOR` variable were introduced
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to allow target platform binaries to run on the host during cross
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compiling.
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* A :prop_tgt:`<LANG>_INCLUDE_WHAT_YOU_USE` target property and supporting
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:variable:`CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE` variable were introduced
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to tell the :ref:`Makefile Generators` and the :generator:`Ninja` generator
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to run ``include-what-you-use`` along with the compiler for ``C`` and
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``CXX`` languages.
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* The :prop_tgt:`<LANG>_VISIBILITY_PRESET` and
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:prop_tgt:`VISIBILITY_INLINES_HIDDEN` target properties now
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affect compilation in sources of all target types. See
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policy :policy:`CMP0063`.
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* The :prop_tgt:`XCODE_ATTRIBUTE_<an-attribute>` target property learned
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to support generator expressions.
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Modules
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-------
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* The :module:`CheckFortranCompilerFlag` module was introduced
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to check ``Fortran`` compiler flags, much like the
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:module:`CheckCCompilerFlag` module already does for ``C``.
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* The :module:`ExternalData` module learned a new
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:variable:`ExternalData_NO_SYMLINKS` option to disable use of
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symbolic links to populate the real data files and use copies
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instead.
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* The :module:`ExternalData` module learned a new ``RECURSE:``
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option in ``DATA{}`` references specifying directories.
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This allows an entire directory tree of associated files
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to be matched.
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* The :module:`ExternalData` module learned a new URL template
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placeholder ``%(algo:<key>)`` to allow custom mapping from
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algorithm name to URL component through configuration of new
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:variable:`ExternalData_URL_ALGO_<algo>_<key>` variables.
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This allows more flexibility in remote URLs.
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* The :module:`ExternalProject` module learned to replace tokens
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like ``<BINARY_DIR>`` in the ``BYPRODUCTS`` of each step.
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* The :module:`ExternalProject` module APIs learned to support
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:manual:`generator expressions <cmake-generator-expressions(7)>`
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when using ``LOG_*`` options and in CMake initial cache options.
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* The :module:`FindBoost` module now tracks the directories containing
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libraries separately for RELEASE and DEBUG configurations.
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* The :module:`FindCUDA` module now defaults to using the static
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CUDA runtime library if it is available. A new
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``CUDA_USE_STATIC_CUDA_RUNTIME`` option is offered to control
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this behavior.
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* The :module:`FindMatlab` module was completely rewritten. It learned
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about versions and components and to find Matlab in a more precise and
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multiplatform way. The module now offers APIs to create mex extensions,
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documentation, and unit tests.
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* The :module:`FindPackageHandleStandardArgs` module
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``FIND_PACKAGE_HANDLE_STANDARD_ARGS`` function now
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always populates both the ``<PackageName>_FOUND``
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and ``<UPPERCASE_NAME>_FOUND`` variables (the latter
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for backwards compatibility). The ``FOUND_VAR``
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option is now ignored except to enforce its allowed
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values.
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* The :module:`InstallRequiredSystemLibraries` module learned a new
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``CMAKE_INSTALL_SYSTEM_RUNTIME_COMPONENT`` option to specify the
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installation component.
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Generator Expressions
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---------------------
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* A new ``COMPILE_LANGUAGE`` generator expression was introduced to
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allow specification of compile options for target files based on the
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:prop_sf:`LANGUAGE` of each source file. Due to limitations of the
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underlying native build tools, this feature has varying support across
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generators. See the :manual:`cmake-generator-expressions(7)` manual
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for details.
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CTest
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-----
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* The :manual:`ctest(1)` tool learned a new ``--repeat-until-fail <n>``
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option to help find sporadic test failures.
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* The :module:`CTestCoverageCollectGCOV` module learned to support
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the same ``CTEST_CUSTOM_COVERAGE_EXCLUDE`` option as the
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:command:`ctest_coverage` command.
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CPack
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-----
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* The :cpack_gen:`CPack IFW Generator` learned to support
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Qt Framework Installer 2.0 tools.
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* The :cpack_gen:`CPack DEB Generator` learned a new
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:variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_SHLIBDEPS`
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variable to specify per-component use of ``dpkg-shlibdeps``.
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* The :cpack_gen:`CPack DEB Generator` learned a new
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:variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_DEPENDS`
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option to specify per-component dependencies.
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* The :cpack_gen:`CPack RPM Generator` learned to package symbolic links
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more cleanly and now supports directory symlinks with recent
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``rpmbuild`` versions.
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* The :cpack_gen:`CPack RPM Generator` learned a new
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:variable:`CPACK_RPM_ADDITIONAL_MAN_DIRS` variable to specify
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directories containing man pages for the brp-compress RPM macro.
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* The :cpack_gen:`CPack RPM Generator` learned a new
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:variable:`CPACK_RPM_<component>_PACKAGE_ARCHITECTURE` variable
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to specify a component-specific package architecture.
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* The CPack WIX generator learned the new
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:prop_inst:`CPACK_START_MENU_SHORTCUTS`,
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:prop_inst:`CPACK_DESKTOP_SHORTCUTS` and
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:prop_inst:`CPACK_STARTUP_SHORTCUTS` installed file properties which can
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be used to install shortcuts in the Start Menu, on the Desktop and
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in the Startup Folder respectively.
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Other
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-----
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* The :manual:`Compile Features <cmake-compile-features(7)>` functionality
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is now aware of features supported by GNU compilers on Windows, versions
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4.4 through 5.0.
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* The :manual:`cmake(1)` ``-E tar`` command learned a new
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``--format<format>`` option to specify the archive format to
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be written.
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* On OS X, CMake learned to create XCTest bundles to test Frameworks
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and App Bundles within Xcode. The :module:`FindXCTest` module
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provides convenience functions to handle :prop_tgt:`XCTEST` bundles.
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Deprecated and Removed Features
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===============================
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* On OS X the :manual:`cmake-gui(1)` no longer has the
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``Install For Command Line Use`` menu item. Instead there
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is a ``How to Install For Command Line Use`` menu item
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that shows an informational dialog box explaining how to
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make the command line tools available. For example::
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/Applications/CMake.app/Contents/bin/cmake-gui --install
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* The :command:`ctest_build` and :command:`build_command` commands
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no longer tell ``make`` tools to ignore errors with the ``-i`` option.
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Previously this was done for :ref:`Makefile Generators` but not others.
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See policy :policy:`CMP0061`.
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* The :generator:`Visual Studio 10 2010` generator no longer checks
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for running VS IDEs with the project open or asks them to reload.
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This was originally done for VS 10 because it had been done for
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VS 7 through 9 to avoid prompting for every project in a solution.
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Since VS >= 10 allow the whole solution to reload at once they
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do not need CMake to help them.
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* The :generator:`Visual Studio 7` generator (.NET 2002) is now
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deprecated and will be removed in a future version of CMake.
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* The :generator:`Visual Studio 6` generator is now deprecated
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and will be removed in a future version of CMake.
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* The :command:`find_package` command no longer considers project
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build trees recently configured in a :manual:`cmake-gui(1)`.
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This was previously done only on Windows and is now never done.
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The ``NO_CMAKE_BUILDS_PATH`` option is now ignored if given
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and effectively always on.
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Projects may populate the :ref:`User Package Registry` to aid
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users building multiple dependent projects one after another.
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* The :command:`add_definitions()` command no longer causes a
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:prop_dir:`DEFINITIONS` directory property to be populated. See policy
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:policy:`CMP0059`.
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* With Visual Studio 7, 8, and 9 generators the value of the ``$(OutDir)``
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placeholder no longer evaluates to the configuration name. Projects
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should use ``$(ConfigurationName)`` for that instead.
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* Using the output of :command:`export()` with the :command:`install(FILES)`
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command is no longer allowed. See policy :policy:`CMP0062` for details.
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Other Changes
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=============
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* The :generator:`Ninja` generator now requires that calls to the
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:command:`add_custom_command` and :command:`add_custom_target`
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commands use the ``BYPRODUCTS`` option to explicitly specify any
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files generated by the custom commands that are not listed as
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outputs (perhaps because their timestamps are allowed to be older
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than the inputs). See policy :policy:`CMP0058`.
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* Build-time progress output of :ref:`Makefile Generators` has been improved.
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It no longer mixes progress and build rule messages during parallel builds.
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The link rule messages now have progress and are displayed as bold green
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instead of bold red (since red is often associated with an error message).
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* The :variable:`CMAKE_CFG_INTDIR` variable value for Visual Studio
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7, 8, and 9 is now ``$(ConfigurationName)`` instead of ``$(OutDir)``.
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This should have no effect on the intended use cases of the variable.
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* Linking to library files by a full path in an implicit linker search
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directory (e.g. ``/usr/lib/libfoo.a``) no longer asks the linker to
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search for the library (e.g. ``-lfoo``) and now links by full path.
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See policy :policy:`CMP0060`.
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