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diff --git a/Help/release/3.4.rst b/Help/release/3.4.rst new file mode 100644 index 000000000..89c5561d3 --- /dev/null +++ b/Help/release/3.4.rst @@ -0,0 +1,273 @@ +CMake 3.4 Release Notes +*********************** + +.. only:: html + + .. contents:: + +Changes made since CMake 3.3 include the following. + +New Features +============ + +Generators +---------- + +* The :generator:`Visual Studio 14 2015` generator learned to select + a Windows 10 SDK based on the value of the :variable:`CMAKE_SYSTEM_VERSION` + variable and the SDKs available on the host. + +* CMake learned rudimentary support for the Apple Swift language. When using + the :generator:`Xcode` generator with Xcode 6.1 or higher, one may enable + the ``Swift`` language with the :command:`enable_language` command or the + :command:`project` command (this is an error with other generators or when + Xcode is too old). Then one may list ``.swift`` source files in targets + for compilation. + +Commands +-------- + +* The :command:`find_program` command learned a ``NAMES_PER_DIR`` + option to consider all given ``NAMES`` in each directory before + moving on to the next directory. + +* The :command:`get_filename_component` command learned a new ``BASE_DIR`` + subcommand. This is used to specify a base directory when calculating an + absolute path from a relative path. + +* The :command:`if` command learned a new ``TEST`` operator that evaluates + to true if a given test name has been defined by the :command:`add_test` + command. See policy :policy:`CMP0064`. + +* The :command:`install(DIRECTORY)` command ``DESTINATION`` option learned to + support :manual:`generator expressions <cmake-generator-expressions(7)>`. + +* The :command:`install(FILES)` command ``DESTINATION`` option learned to + support :manual:`generator expressions <cmake-generator-expressions(7)>`. + +* The :command:`string` command learned a new ``APPEND`` subcommand. + +Variables +--------- + +* The :ref:`Makefile Generators` and the :generator:`Ninja` generator + learned to add compiler launcher tools like distcc and ccache along + with the compiler for ``C`` and ``CXX`` languages. See the + :variable:`CMAKE_<LANG>_COMPILER_LAUNCHER` variable and + :prop_tgt:`<LANG>_COMPILER_LAUNCHER` target property for details. + +* New :variable:`CMAKE_LINK_SEARCH_START_STATIC` and + :variable:`CMAKE_LINK_SEARCH_END_STATIC` variables were + introduced to initialize the + :prop_tgt:`LINK_SEARCH_START_STATIC` and + :prop_tgt:`LINK_SEARCH_END_STATIC` target properties, + respectively. + +Properties +---------- + +* :ref:`Visual Studio Generators` learned to support additonal + target properties to customize projects for NVIDIA Nsight + Tegra Visual Studio Edition: + + * :prop_tgt:`ANDROID_ANT_ADDITIONAL_OPTIONS` + * :prop_tgt:`ANDROID_ARCH` + * :prop_tgt:`ANDROID_ASSETS_DIRECTORIES` + * :prop_tgt:`ANDROID_JAR_DEPENDENCIES` + * :prop_tgt:`ANDROID_JAR_DIRECTORIES` + * :prop_tgt:`ANDROID_JAVA_SOURCE_DIR` + * :prop_tgt:`ANDROID_NATIVE_LIB_DEPENDENCIES` + * :prop_tgt:`ANDROID_NATIVE_LIB_DIRECTORIES` + * :prop_tgt:`ANDROID_PROCESS_MAX` + * :prop_tgt:`ANDROID_PROGUARD` + * :prop_tgt:`ANDROID_PROGUARD_CONFIG_PATH` + * :prop_tgt:`ANDROID_SECURE_PROPS_PATH` + * :prop_tgt:`ANDROID_SKIP_ANT_STEP` + * :prop_tgt:`ANDROID_STL_TYPE` + +* The :prop_tgt:`ARCHIVE_OUTPUT_DIRECTORY`, + :prop_tgt:`LIBRARY_OUTPUT_DIRECTORY`, and + :prop_tgt:`RUNTIME_OUTPUT_DIRECTORY` target properties learned to + support :manual:`generator expressions <cmake-generator-expressions(7)>`. + +* The :prop_tgt:`SOURCE_DIR` and :prop_tgt:`BINARY_DIR` target properties + were introduced to allow project code to query where a target is defined. + +* The :prop_tgt:`OUTPUT_NAME` target property and its variants learned to + support :manual:`generator expressions <cmake-generator-expressions(7)>`. + +* A :prop_gbl:`TARGET_MESSAGES` global property was added to tell the + :ref:`Makefile Generators` whether to generate commands to print output + after each target is completed. + +* On Windows with MS-compatible tools, CMake learned to optionally + generate a module definition (``.def``) file for ``SHARED`` libraries. + See the :prop_tgt:`WINDOWS_EXPORT_ALL_SYMBOLS` target property. + +Modules +------- + +* The :module:`ExternalProject` module :command:`ExternalProject_Add` + function ``GIT_SUBMODULES`` option now also limits the set of + submodules that are initialized in addition to the prior behavior + of limiting the set of submodules that are updated. + +* The :module:`ExternalProject` module learned new ``USES_TERMINAL`` + arguments for giving steps exclusive terminal access. This is + useful with the :generator:`Ninja` generator to monitor CMake + superbuild progress and prevent CPU oversubscription. + +* The :module:`FindBISON` module ``BISON_TARGET`` macro learned a + new ``DEFINES_FILE`` option to specify a custom output header + to be generated. + +* The :module:`FindHDF5` module learend a new ``HDF5_PREFER_PARALLEL`` + option allowing users to specify that a parallel HDF5 tool is + preferred if both are available. + +* The :module:`FindIce` module now provides imported targets. + +* The :module:`FindJava` module learned to optionally find + the ``idlj`` and ``jarsigner`` tools. + +* The :module:`FindOpenSSL` module now provides imported targets. + +* The :module:`FindOpenSSL` module learned a new ``OPENSSL_USE_STATIC_LIBS`` + option to search only for static libraries. + +* The :module:`FindPkgConfig` learned a new :command:`pkg_get_variable` + command which may be used to query for arbitrary variables from a package + (such as for related tools or data and plugin install paths). + +* The :module:`FindProtobuf` module gained a new + :command:`protobuf_generate_python` function to generate python + sources from ``.proto`` files. + +* The :module:`FindTIFF` module learned to search separately for + debug and release variants. + +* The :module:`FindwxWidgets` module learned to support version requests. + +* The :module:`FindXercesC` module learned to search separately for + debug and release variants. + +* The :module:`FindZLIB` module learned to search separately for + debug and release variants. + +* The :module:`GNUInstallDirs` module learned special default values + for certain installation prefixes according to the `GNU Coding + Standards`_ and the `Filesystem Hierarchy Standard`_. + +* The :module:`UseJava` module ``add_jar`` function learned + to support response files (e.g. ``@srcs.txt``) for source + specification. + +* The :module:`UseJava` module ``install_jar`` function learned + new ``DESTINATION`` and ``COMPONENT`` options to specify + the corresponding :command:`install` command options. + +* The :module:`UseJava` module gained a new ``create_javah`` + function to create C headers from Java classes. + +.. _`GNU Coding Standards`: https://www.gnu.org/prep/standards/html_node/Directory-Variables.html +.. _`Filesystem Hierarchy Standard`: https://refspecs.linuxfoundation.org/FHS_3.0/fhs/index.html + +Generator Expressions +--------------------- + +* A new ``$<SHELL_PATH:...>`` + :manual:`generator expression <cmake-generator-expressions(7)>` + has been added. + +CTest +----- + +* CTest learned to optionally measure the CPU load during parallel + testing and avoid starting tests that may cause the load to exceed + a given threshold. See the :manual:`ctest(1)` command ``--test-load`` + option, the ``TestLoad`` setting of the :ref:`CTest Test Step`, + the :variable:`CTEST_TEST_LOAD` variable, and the ``TEST_LOAD`` + option of the :command:`ctest_test` command. + +* :manual:`ctest(1)` learned options + ``--test-output-size-passed`` and ``--test-output-size-failed`` + to customize the limit on test output size submitted when + running as a :ref:`Dashboard Client`. + +CPack +----- + +* The :module:`CPackDeb` module learned to set package dependencies + per component. See variables: + + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_BREAKS` + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_CONFLICTS` + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_ENHANCES` + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_PREDEPENDS` + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_PROVIDES` + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_RECOMMENDS` + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_REPLACES` + * :variable:`CPACK_DEBIAN_<COMPONENT>_PACKAGE_SUGGESTS` + +* The :module:`CPack` module learned to package empty directories. + +* The :module:`CPack` module gained a new setting, ``CPACK_VERBATIM_VARIABLES``, + which can be used to ensure the cpack program receives the settings' values + exactly as they were set, even if they contain CMake-special characters. + For compatibility, it's off by default. + +Other +----- + +* The :manual:`Compile Features <cmake-compile-features(7)>` functionality + is now aware of features supported by GNU C compilers on Windows. + +* CMake learned to honor ``*.manifest`` source files with MSVC tools. + Manifest files named as sources of ``.exe`` and ``.dll`` targets + will be merged with linker-generated manifests and embedded in the + binary. + +* The `Concurrent Fortran 77 <https://ccur.com>`__ compiler is now supported. + Its :variable:`compiler id <CMAKE_<LANG>_COMPILER_ID>` is ``CCur``. + +* :manual:`cmake(1)` gained a new ``--trace-expand`` command line option + that is like ``--trace`` but expands variable references in the output. + +Deprecated and Removed Features +=============================== + +* The :module:`CMakeExpandImportedTargets` module is now documented + as deprecated. See module documentation for an explanation. + +* The :variable:`CMAKE_USE_RELATIVE_PATHS` variable no longer has any + effect. Previously it was partially implemented and unreliable. + +Other Changes +============= + +* The :module:`CheckFunctionExists`, :module:`CheckLibraryExists`, + :module:`CheckSymbolExists`, and :module:`FindThreads` modules learned to + work in environments where only CXX is enabled. + +* The :module:`CPackDeb` module now correctly excludes symlinks during package + checksum calculation. + +* The :module:`CPackDeb` no longer uses fakeroot and system tar program for + packaging. + +* The :module:`CPack` module no longer mangles settings with CMake-special + characters when they're used as defaults for other settings. The macro + ``cpack_set_if_not_set``, which was responsible for this, is now deprecated. + +* CMake no longer links executables with flags to export symbols + unless the :prop_tgt:`ENABLE_EXPORTS` target property is set. + See policy :policy:`CMP0065`. + +* The ``SONAME`` field is no longer set for ``MODULE`` libraries + created with the :command:`add_library` command. ``MODULE`` + libraries are meant for explicit dynamic loading at runtime. + They cannot be linked so ``SONAME`` is not useful. + +* The internal :variable:`CMAKE_<LANG>_COMPILE_OBJECT` rule variable now + substitutes compiler include flags in a separate ``<INCLUDES>`` placeholder + instead of the main ``<FLAGS>`` placeholder. |