| CMake 3.30 Release Notes | |
| ************************ | |
| .. only:: html | |
| .. contents:: | |
| Changes made since CMake 3.29 include the following. | |
| New Features | |
| ============ | |
| Presets | |
| ------- | |
| * :manual:`cmake-presets(7)` files now support schema version ``9``. | |
| ``include`` fields now expand all macros except ``$env{}`` and | |
| preset-specific macros, i.e., those derived from the fields | |
| inside a preset's definition. | |
| File-Based API | |
| -------------- | |
| * The :manual:`cmake-file-api(7)` "cmakeFiles" version 1 object's ``version`` | |
| field has been updated to 1.1. It gained a ``globsDependent`` field to | |
| report :command:`file(GLOB)` calls using ``CONFIGURE_DEPENDS``. | |
| Generators | |
| ---------- | |
| * :ref:`Visual Studio Generators` now add ``UseDebugLibraries`` indicators to | |
| ``.vcxproj`` files to denote which configurations are debug configurations. | |
| See policy :policy:`CMP0162`. | |
| Languages | |
| --------- | |
| * The :manual:`Compile Features <cmake-compile-features(7)>` functionality | |
| now implements support for the ``cxx_std_26`` and ``cuda_std_26`` | |
| meta-features to indicate that the compiler mode must be at least C++26. | |
| These meta-features were first documented by CMake 3.25, but were not fully | |
| implemented. | |
| Commands | |
| -------- | |
| * The :command:`add_library` command, on platforms that do not support shared | |
| libraries, now rejects creation of shared libraries instead of automatically | |
| converting them to static libraries. See policy :policy:`CMP0164`. | |
| * The :command:`enable_language` command now fails with an error | |
| if it is called before the first :command:`project` call. | |
| See policy :policy:`CMP0165`. | |
| * The :command:`file(DOWNLOAD)` and :command:`file(UPLOAD)` commands | |
| gained a ``TLS_VERSION <min>`` option to specify the minimum TLS | |
| version for connections to ``https://`` URLs. | |
| Variables | |
| --------- | |
| * The :variable:`CMAKE_<LANG>_STANDARD_LATEST` variable was added to | |
| describe the latest ``<LANG>`` language standard CMake supports for | |
| the selected compiler. | |
| * The :envvar:`CMAKE_TLS_VERIFY` environment variable was added as a fallback | |
| to the existing :variable:`CMAKE_TLS_VERIFY` variable. It specifies | |
| whether to verify the server certificate for ``https://`` URLs by default. | |
| * The :variable:`CMAKE_TLS_VERSION` variable and :envvar:`CMAKE_TLS_VERSION` | |
| environment variable were added to specify a default minimum TLS version | |
| for connections to ``https://`` URLs by the :command:`file(DOWNLOAD)` | |
| and :command:`file(UPLOAD)` commands. | |
| * The :variable:`CMAKE_VS_USE_DEBUG_LIBRARIES` variable and corresponding | |
| :prop_tgt:`VS_USE_DEBUG_LIBRARIES` target property were added to explicitly | |
| control ``UseDebugLibraries`` indicators in ``.vcxproj`` files. | |
| Properties | |
| ---------- | |
| * The :prop_sf:`GENERATED` source file property is now visible in all | |
| directories. See policy :policy:`CMP0163`. Policy :policy:`CMP0118`'s | |
| documentation has been revised to describe its actual effects. | |
| * The :prop_gbl:`PROPAGATE_TOP_LEVEL_INCLUDES_TO_TRY_COMPILE` global property | |
| can be used to propagate :variable:`CMAKE_PROJECT_TOP_LEVEL_INCLUDES` into | |
| :command:`try_compile` calls that use the | |
| :ref:`whole-project signature <Try Compiling Whole Projects>`. | |
| This is primarily intended as a way for dependency providers to be enabled | |
| in such :command:`try_compile` calls. | |
| * A :prop_tgt:`VS_FILTER_PROPS` target property was added to tell | |
| :ref:`Visual Studio Generators` to use a custom MSBuild filter | |
| ``.props`` file. | |
| Modules | |
| ------- | |
| * The :module:`ExternalProject` module's :command:`ExternalProject_Add` | |
| command gained a ``TLS_VERSION <min>`` option, and support for the | |
| :variable:`CMAKE_TLS_VERSION` variable and :envvar:`CMAKE_TLS_VERSION` | |
| environment variable, to specify the minimum TLS version for connections | |
| to ``https://`` URLs. | |
| * The :module:`FindBacktrace` module now provides an imported target. | |
| * The :module:`FindBLAS` and :module:`FindLAPACK` modules gained | |
| support for ``libblastrampoline``. | |
| * The :module:`FindCUDAToolkit` module now provides a target for | |
| ``libnvfatbin`` and ``libnvfatbin_static``, if found. | |
| * The :module:`FindCUDAToolkit` module now searches the | |
| :variable:`CMAKE_CUDA_COMPILER <CMAKE_<LANG>_COMPILER>` | |
| variable and the :envvar:`CUDACXX` environment variable | |
| even when the ``CUDA`` language isn't enabled. | |
| * The :module:`FindOpenMP` module gained an ``OpenMP_RUNTIME_MSVC`` | |
| option to control the OpenMP runtime used with MSVC. | |
| * The :module:`FindPython` and :module:`FindPython3` modules gained | |
| support for the free threaded Python version. | |
| * The :module:`FindPython`, :module:`FindPython2`, and :module:`FindPython3` | |
| modules, on Windows, now offer better support for the Python debug variant: | |
| * new variables: | |
| * ``Python_EXECUTABLE_DEBUG`` | |
| * ``Python_INTERPRETER`` | |
| * ``Python_DEBUG_POSTFIX`` | |
| * new targets: | |
| * ``Python::InterpreterDebug`` | |
| * ``Python::InterpreterMultiConfig`` | |
| The ``python_add_library()`` command now manages the | |
| :prop_tgt:`DEBUG_POSTFIX` target property based on the value | |
| of the ``Python_DEBUG_POSTFIX`` variable. | |
| Generator Expressions | |
| --------------------- | |
| * The :genex:`<LANG>_COMPILER_FRONTEND_VARIANT <C_COMPILER_FRONTEND_VARIANT>` | |
| family of generator expressions were added to access the value of the | |
| associated :variable:`CMAKE_<LANG>_COMPILER_FRONTEND_VARIANT` variables. | |
| * Link features, as used with the :genex:`LINK_LIBRARY` generator expression, | |
| gained the ability to have attributes that describe their behavior by | |
| specifying the :variable:`CMAKE_LINK_LIBRARY_<FEATURE>_ATTRIBUTES` or | |
| :variable:`CMAKE_<LANG>_LINK_LIBRARY_<FEATURE>_ATTRIBUTES` variables. | |
| * The :genex:`QUOTE` generator expression was added to evaluate to ``"``. | |
| * The :genex:`TARGET_PROPERTY` generator expression learned to evaluate | |
| :ref:`custom transitive properties <Custom Transitive Properties>` | |
| defined by new :prop_tgt:`TRANSITIVE_COMPILE_PROPERTIES` and | |
| :prop_tgt:`TRANSITIVE_LINK_PROPERTIES` target properties. | |
| * The :genex:`TARGET_PROPERTY` generator expression now evaluates target | |
| properties :prop_tgt:`INTERFACE_LINK_OPTIONS`, | |
| :prop_tgt:`INTERFACE_LINK_DIRECTORIES`, and | |
| :prop_tgt:`INTERFACE_LINK_DEPENDS` correctly by following private | |
| dependencies of static libraries. See policy :policy:`CMP0166`. | |
| CTest | |
| ----- | |
| * The :command:`ctest_submit` command and :option:`ctest -T Submit <ctest -T>` | |
| step gained ``TLSVersion`` and ``TLSVerify`` options to control negotiation | |
| with ``https://`` URLs. See the :variable:`CTEST_TLS_VERSION` and | |
| :variable:`CTEST_TLS_VERIFY` variables. | |
| CPack | |
| ----- | |
| * The :cpack_gen:`CPack Inno Setup Generator` is now available | |
| on non-Windows hosts. | |
| * The :cpack_gen:`CPack NuGet Generator` gained the | |
| :variable:`CPACK_NUGET_PACKAGE_README`, | |
| :variable:`CPACK_NUGET_PACKAGE_REPOSITORY_URL`, | |
| :variable:`CPACK_NUGET_PACKAGE_REPOSITORY_TYPE`, | |
| :variable:`CPACK_NUGET_PACKAGE_REPOSITORY_BRANCH`, and | |
| :variable:`CPACK_NUGET_PACKAGE_REPOSITORY_COMMIT` variables. | |
| * The :cpack_gen:`CPack NuGet Generator` can now generate dependency groups | |
| for framework-specific dependencies. The :variable:`CPACK_NUGET_PACKAGE_TFMS` | |
| variable was added to specify a list of target framework monikers (TFMs) | |
| for which groups should be generated. | |
| * The :cpack_gen:`CPack WIX Generator` gained support for WiX Toolset v4. | |
| See the :variable:`CPACK_WIX_VERSION` variable. | |
| Deprecated and Removed Features | |
| =============================== | |
| * The :module:`FindBoost` module has been removed by policy :policy:`CMP0167`. | |
| Port projects to upstream Boost's ``BoostConfig.cmake`` package | |
| configuration file, for which ``find_package(Boost)`` now searches. | |
| * Calling :command:`FetchContent_Populate` with just the name of a | |
| dependency is now deprecated. Projects should call | |
| :command:`FetchContent_MakeAvailable` instead. See policy :policy:`CMP0169`. | |
| Calling :command:`FetchContent_Populate` with full population details | |
| rather than just a dependency name remains fully supported. | |
| * The :generator:`Visual Studio 9 2008` generator has been removed. | |
| Other Changes | |
| ============= | |
| * :manual:`ctest(1)` now rejects unknown command-line arguments with an error. | |
| Previously they were silently ignored. | |
| * The precompiled Windows ``.msi`` installers provided on | |
| `cmake.org <https://cmake.org/download/>`_, when performing a fresh | |
| installation, now modify the system-wide ``PATH`` by default. | |
| When replacing an existing installation of 3.30 or later, the ``PATH`` | |
| modification preference is preserved by default. | |
| * The official ``.zip`` source archive provided on | |
| `cmake.org <https://cmake.org/download/>`_ now uses LF newlines, | |
| instead of CRLF newlines, for consistency with modern conventions. | |
| * The durations printed after "Configuring done" and "Generating done" | |
| messages now reflect time spent in generator-specific steps, and | |
| in a code model evaluation step at the beginning of generation that | |
| was not previously captured. Printed durations may appear longer | |
| than in previous versions of CMake, but are more accurate. | |
| * :module:`FetchContent` now prefers to populate content directly rather | |
| than using a separate sub-build. This may significantly improve configure | |
| times on some systems (Windows especially, but also on macOS when using | |
| the Xcode generator). :option:`cmake --fresh` also forces the download, | |
| update, and patch steps of directly populated dependencies to be re-executed. | |
| Policy :policy:`CMP0168` provides backward compatibility for those projects | |
| that still rely on using a sub-build for content population. | |
| * When :variable:`FETCHCONTENT_FULLY_DISCONNECTED` is set to true, | |
| :command:`FetchContent_MakeAvailable` and the single-argument form of | |
| :command:`FetchContent_Populate` require that the dependency's source | |
| directory has already been populated. CMake 3.29 and earlier did not | |
| check this requirement, but it is now enforced, subject to policy | |
| :policy:`CMP0170`. | |
| Updates | |
| ======= | |
| Changes made since CMake 3.30.0 include the following. | |
| 3.30.1, 3.30.2 | |
| -------------- | |
| * These versions made no changes to documented features or interfaces. | |
| Some implementation updates were made to support ecosystem changes | |
| and/or fix regressions. | |
| 3.30.3 | |
| ------ | |
| * The :command:`project(<PROJECT-NAME>)` command now sets | |
| :variable:`<PROJECT-NAME>_SOURCE_DIR`, :variable:`<PROJECT-NAME>_BINARY_DIR`, | |
| and :variable:`<PROJECT-NAME>_IS_TOP_LEVEL` as normal variables in addition | |
| to setting them as cache entries. This is needed to preserve support for | |
| some :module:`FetchContent` use cases under policy :policy:`CMP0169`'s | |
| NEW behavior. | |
| * The :module:`FindPython` and :module:`FindPython3` modules now define, | |
| respectively, the ``Python_DEFINITIONS`` and ``Python3_DEFINITIONS`` | |
| variables on Windows to support development with the free threaded | |
| version of Python. The :prop_tgt:`INTERFACE_COMPILE_DEFINITIONS` target | |
| property is also defined for the various targets provided by these modules. | |
| 3.30.4 | |
| ------ | |
| * The :command:`project(<PROJECT-NAME>)` command now sets | |
| :variable:`<PROJECT-NAME>_SOURCE_DIR`, :variable:`<PROJECT-NAME>_BINARY_DIR`, | |
| and :variable:`<PROJECT-NAME>_IS_TOP_LEVEL` as normal variables only if they | |
| are already set as cache or non-cache variables when :command:`project` is | |
| invoked. Cache entries by the same names are always set as before. | |
| This refines 3.30.3's behavior change to restore behavior of nested | |
| directories that call :command:`project` with the same project name, | |
| but the implementation in this release is flawed (this release note has | |
| been retoractively updated). It can result in different behavior between | |
| the first and subsequent runs. Do not use CMake 3.30.4 if your project | |
| contains nested calls to :command:`project` with the same project name | |
| and you use these variables. | |
| 3.30.5 | |
| ------ | |
| * The :command:`project(<PROJECT-NAME>)` command now sets | |
| :variable:`<PROJECT-NAME>_SOURCE_DIR`, :variable:`<PROJECT-NAME>_BINARY_DIR`, | |
| and :variable:`<PROJECT-NAME>_IS_TOP_LEVEL` as non-cache variables only if | |
| they are already set as non-cache variables when :command:`project` is | |
| invoked. Cache entries by the same names are always set as before. | |
| This refines 3.30.3's behavior change to restore behavior of nested | |
| directories that call :command:`project` with the same project name, | |
| and it addresses the bug in the implementation introduced in 3.30.4. | |
| 3.30.6, 3.30.7 | |
| -------------- | |
| * These versions made no changes to documented features or interfaces. | |
| Some implementation updates were made to support ecosystem changes | |
| and/or fix regressions. | |