CMake 3.30.0-rc4 is ready for testing
June 24, 2024
I am proud to announce the fourth CMake 3.30 release candidate.
https://cmake.org/download/
Documentation is available at:
https://cmake.org/cmake/help/v3.30
Release notes appear below and are also published at
https://cmake.org/cmake/help/v3.30/release/3.30.html
Release milestone is available at:
release milestone
Some of the most significant changes in CMake 3.30 are:
-
“cmake-presets(7)” files now support schema version “9”. “include”
fields now expand all macros except “$env{}” and preset-specific
macros, i.e., those derived from the fields inside a preset’s
definition. -
The “Compile Features” functionality now implements support for the
“cxx_std_26” and “cuda_std_26” meta-features to indicate that the
compiler mode must be at least C++26. These meta-features were first
documented by CMake 3.25, but were not fully implemented. -
The “CMAKE_<LANG>_STANDARD_LATEST” variable was added to describe
the latest “<LANG>” language standard CMake supports for the
selected compiler. -
The “CMAKE_TLS_VERSION” variable and “CMAKE_TLS_VERSION” environment
variable were added to specify a default minimum TLS version for
connections to “https://” URLs by the “file(DOWNLOAD)” and
“file(UPLOAD)” commands. -
The “GENERATED” source file property is now visible in all
directories. See policy “CMP0163”. Policy “CMP0118″‘s
documentation has been revised to describe its actual effects. -
The “FindPython”, “FindPython2”, and “FindPython3” modules, on
Windows, now offer better support for the Python debug variant. -
The “TARGET_PROPERTY” generator expression learned to evaluate
custom transitive properties defined by new
“TRANSITIVE_COMPILE_PROPERTIES” and “TRANSITIVE_LINK_PROPERTIES”
target properties. -
The “CPack WIX Generator” gained support for WiX Toolset v4. See the
“CPACK_WIX_VERSION” variable. -
The “FindBoost” module has been removed by policy “CMP0167”. Port
projects to upstream Boost’s “BoostConfig.cmake” package
configuration file, for which “find_package(Boost)” now searches. -
The precompiled Windows “.msi” installers provided on cmake.org,
when performing a fresh installation, now modify the system-wide
“PATH” by default.
CMake 3.30 Release Notes
************************
Changes made since CMake 3.29 include the following.
New Features
============
Presets
-------
* "cmake-presets(7)" files now support schema version "9". "include"
fields now expand all macros except "$env{}" and preset-specific
macros, i.e., those derived from the fields inside a preset's
definition.
File-Based API
--------------
* The "cmake-file-api(7)" "cmakeFiles" version 1 object's "version"
field has been updated to 1.1. It gained a "globsDependent" field
to report "file(GLOB)" calls using "CONFIGURE_DEPENDS".
Generators
----------
* Visual Studio Generators now add "UseDebugLibraries" indicators to
".vcxproj" files to denote which configurations are debug
configurations. See policy "CMP0162".
Languages
---------
* The "Compile Features" 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 "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
"CMP0164".
* The "enable_language()" command now fails with an error if it is
called before the first "project()" call. See policy "CMP0165".
* The "file(DOWNLOAD)" and "file(UPLOAD)" commands gained a
"TLS_VERSION <min>" option to specify the minimum TLS version for
connections to "https://" URLs.
Variables
---------
* The "CMAKE_<LANG>_STANDARD_LATEST" variable was added to describe
the latest "<LANG>" language standard CMake supports for the
selected compiler.
* The "CMAKE_TLS_VERIFY" environment variable was added as a fallback
to the existing "CMAKE_TLS_VERIFY" variable. It specifies whether
to verify the server certificate for "https://" URLs by default.
* The "CMAKE_TLS_VERSION" variable and "CMAKE_TLS_VERSION" environment
variable were added to specify a default minimum TLS version for
connections to "https://" URLs by the "file(DOWNLOAD)" and
"file(UPLOAD)" commands.
* The "CMAKE_VS_USE_DEBUG_LIBRARIES" variable and corresponding
"VS_USE_DEBUG_LIBRARIES" target property were added to explicitly
control "UseDebugLibraries" indicators in ".vcxproj" files.
Properties
----------
* The "GENERATED" source file property is now visible in all
directories. See policy "CMP0163". Policy "CMP0118"'s
documentation has been revised to describe its actual effects.
* The "PROPAGATE_TOP_LEVEL_INCLUDES_TO_TRY_COMPILE" global property
can be used to propagate "CMAKE_PROJECT_TOP_LEVEL_INCLUDES" into
"try_compile()" calls that use the whole-project signature. This is
primarily intended as a way for dependency providers to be enabled
in such "try_compile()" calls.
* A "VS_FILTER_PROPS" target property was added to tell Visual Studio
Generators to use a custom MSBuild filter ".props" file.
Modules
-------
* The "ExternalProject" module's "ExternalProject_Add()" command
gained a "TLS_VERSION <min>" option, and support for the
"CMAKE_TLS_VERSION" variable and "CMAKE_TLS_VERSION" environment
variable, to specify the minimum TLS version for connections to
"https://" URLs.
* The "FindBacktrace" module now provides an imported target.
* The "FindBLAS" and "FindLAPACK" modules gained support for
"libblastrampoline".
* The "FindCUDAToolkit" module now provides a target for "libnvfatbin"
and "libnvfatbin_static", if found.
* The "FindCUDAToolkit" module now searches the "CMAKE_CUDA_COMPILER"
variable and the "CUDACXX" environment variable even when the "CUDA"
language isn't enabled.
* The "FindOpenMP" module gained an "OpenMP_RUNTIME_MSVC" option to
control the OpenMP runtime used with MSVC.
* The "FindPython" and "FindPython3" modules gained support for the
free threaded Python version.
* The "FindPython", "FindPython2", and "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 "DEBUG_POSTFIX"
target property based on the value of the "Python_DEBUG_POSTFIX"
variable.
Generator Expressions
---------------------
* The "<LANG>_COMPILER_FRONTEND_VARIANT" family of generator
expressions were added to access the value of the associated
"CMAKE_<LANG>_COMPILER_FRONTEND_VARIANT" variables.
* Link features, as used with the "LINK_LIBRARY" generator expression,
gained the ability to have attributes that describe their behavior
by specifying the "CMAKE_LINK_LIBRARY_<FEATURE>_ATTRIBUTES" or
"CMAKE_<LANG>_LINK_LIBRARY_<FEATURE>_ATTRIBUTES" variables.
* The "QUOTE" generator expression was added to evaluate to """.
* The "TARGET_PROPERTY" generator expression learned to evaluate
custom transitive properties defined by new
"TRANSITIVE_COMPILE_PROPERTIES" and "TRANSITIVE_LINK_PROPERTIES"
target properties.
* The "TARGET_PROPERTY" generator expression now evaluates target
properties "INTERFACE_LINK_OPTIONS", "INTERFACE_LINK_DIRECTORIES",
and "INTERFACE_LINK_DEPENDS" correctly by following private
dependencies of static libraries. See policy "CMP0166".
CTest
-----
* The "ctest_submit()" command and "ctest -T Submit" step gained
"TLSVersion" and "TLSVerify" options to control negotiation with
"https://" URLs. See the "CTEST_TLS_VERSION" and "CTEST_TLS_VERIFY"
variables.
CPack
-----
* The "CPack Inno Setup Generator" is now available on non-Windows
hosts.
* The "CPack NuGet Generator" gained the
"CPACK_NUGET_PACKAGE_README",
"CPACK_NUGET_PACKAGE_REPOSITORY_URL",
"CPACK_NUGET_PACKAGE_REPOSITORY_TYPE",
"CPACK_NUGET_PACKAGE_REPOSITORY_BRANCH", and
"CPACK_NUGET_PACKAGE_REPOSITORY_COMMIT" variables.
* The "CPack NuGet Generator" can now generate dependency groups for
framework-specific dependencies. The "CPACK_NUGET_PACKAGE_TFMS"
variable was added to specify a list of target framework monikers
(TFMs) for which groups should be generated.
* The "CPack WIX Generator" gained support for WiX Toolset v4. See the
"CPACK_WIX_VERSION" variable.
Deprecated and Removed Features
===============================
* The "FindBoost" module has been removed by policy "CMP0167". Port
projects to upstream Boost's "BoostConfig.cmake" package
configuration file, for which "find_package(Boost)" now searches.
* Calling "FetchContent_Populate()" with just the name of a dependency
is now deprecated. Projects should call
"FetchContent_MakeAvailable()" instead. See policy "CMP0169".
Calling "FetchContent_Populate()" with full population details
rather than just a dependency name remains fully supported.
* The "Visual Studio 9 2008" generator has been removed.
Other Changes
=============
* The precompiled Windows ".msi" installers provided on cmake.org,
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 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.
* "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). "cmake --fresh" also forces the
download, update, and patch steps of directly populated dependencies
to be re-executed. Policy "CMP0168" provides backward compatibility
for those projects that still rely on using a sub-build for content
population.
* When "FETCHCONTENT_FULLY_DISCONNECTED" is set to true,
"FetchContent_MakeAvailable()" and the single-argument form of
"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
"CMP0170".
----------------------------------------------------------------------------
Changes made since CMake 3.30.0-rc3:
Adrian DC (1):
CPack/RPM: Fix debuginfo permissions check
Alex Turbov (7):
Help: Reorder variables as they mentioned in the official spec
Help: CPack/NuGet add deprecation notes according to the current spec
Help: CPack/NuGet fix `versionadded` position
Help: CPack/NuGet add description to the added variables
Help: CPack/NuGet add `:Supported:` to some variables
Help: CPack/NuGet avoid deprecated variables in the usage example
Help: Mention CPack/NuGet additions in the 3.30 release notes
Brad King (9):
ci: Update CMake version to 3.30.0-rc3
cmGlobalNinjaGenerator: De-duplicate CMAKE_CONFIGURATION_TYPES lookup
cmGlobalNinjaGenerator: Factor out helper for global config list lookup
cmGlobalNinjaGenerator: Reuse local generator caching of config list
Ninja Multi-Config: Fix crash if config list is changed in subdirectory
libuv: macos: reap child processes more reliably when using kqueue
libuv: macos: restore use of kqueue instead of posix poll
VS: Fix '-T version=14.4x' under VS 17.1x
CMake 3.30.0-rc4
Craig Scott (1):
Help: Improve link library feature properties docs
Marc Chevrier (2):
Libraries processing: update configuration wording
Link feature attributes: stabilization
eutro (1):
cmake-mode.el: fix bracket string/comment syntax-propertize