[ANNOUNCE] CMake 3.29.0-rc2 is ready for testing

John Parent john.parent at kitware.com
Thu Feb 22 23:10:18 GMT 2024 

  I am proud to announce the second CMake 3.29 release candidate.
  https://cmake.org/download/

Documentation is available at:
  https://cmake.org/cmake/help/v3.29

Release notes appear below and are also published at
  https://cmake.org/cmake/help/v3.29/release/3.29.html

Release milestone is available at:
  https://gitlab.kitware.com/cmake/cmake/-/milestones/136

Some of the more significant changes in CMake 3.29 are:

* The LLVM/Clang GNU-like frontend on Windows ("clang++") may now be
  used to compile "CUDA" language sources.

* TI Clang-based compilers are now supported with compiler id
  "TIClang".

* The "cmake_language(EXIT)" sub-command was added to terminate "cmake
  -P" scripts with a specified exit code.

* The "export(SETUP)" sub-command was added to configure export sets.
  Its "PACKAGE_DEPENDENCY" option configures how "find_dependency()"
  calls are exported.  Its "TARGET" option's "XCFRAMEWORK_LOCATION"
  setting specifies the location of a ".xcframework" that can be
  substituted for an installed target.

* "install(EXPORT)" and "export(EXPORT)" learned a new
  "EXPORT_PACKAGE_DEPENDENCIES" argument, which can be used to
  generate "find_dependency()" calls based on what targets the
  exported targets depend on.

* The "CMAKE_LINKER_TYPE" variable and corresponding "LINKER_TYPE"
  target property were added to specify what linker to use with some
  toolchains.

* A "CMAKE_TEST_LAUNCHER" variable and corresponding "TEST_LAUNCHER"
  target property were added to specify a launcher to be used by
  executable targets when invoked by tests added by the "add_test()"
  command.



CMake 3.29 Release Notes
************************

Changes made since CMake 3.28 include the following.


New Features
============


Command-Line
------------

* "cmake(1)" "-E cat" can now print the standard input by passing the
  "-" argument.


Generators
----------

* Visual Studio Generators now support selecting between the Intel
  oneAPI Fortran compiler ("ifx") and the Intel classic Fortran
  compiler ("ifort") using a "fortran=" field in
  "CMAKE_GENERATOR_TOOLSET".


File-Based API
--------------

* The "cmake-file-api(7)" "codemodel" version 2 "version" field has
  been updated to 2.7.

* The "cmake-file-api(7)" "codemodel" version 2 "target" object gained
  a new "launchers" field.


Compilers
---------

* The LLVM/Clang GNU-like frontend on Windows ("clang++") may now be
  used to compile "CUDA" language sources.

* Compilers targeting the GNU ABI on Windows (MinGW) may now be used
  to compile Objective C ("OBJC") and Objective C++ ("OBJCXX").  These
  include GNU compilers ("gcc" and "g++") and the LLVM/Clang GNU-like
  frontends ("clang" and "clang++").

* TI Clang-based compilers are now supported with compiler id
  "TIClang".


Commands
--------

* The add_custom_command(TARGET) signature now supports adding build
  events through Alias Targets.

* The "cmake_language(EXIT)" sub-command was added to terminate "cmake
  -P" scripts with a specified exit code.

* The "export(SETUP)" sub-command was added to configure export sets.
  Its "PACKAGE_DEPENDENCY" option configures how "find_dependency()"
  calls are exported.  Its "TARGET" option's "XCFRAMEWORK_LOCATION"
  setting specifies the location of a ".xcframework" that can be
  substituted for an installed target.

* The "if()" command gained new tests "IS_READABLE", "IS_WRITABLE" and
  "IS_EXECUTABLE" to check file or directory permissions.

* "install(EXPORT)" and "export(EXPORT)" learned a new
  "EXPORT_PACKAGE_DEPENDENCIES" argument, which can be used to
  generate "find_dependency()" calls based on what targets the
  exported targets depend on.


Variables
---------

* The "CMAKE_INSTALL_PREFIX" environment variable was added to provide
  a default value for the "CMAKE_INSTALL_PREFIX" variable.

* The "CMAKE_LINKER_TYPE" variable and corresponding "LINKER_TYPE"
  target property were added to specify what linker to use with some
  toolchains.

* The "CMAKE_<LANG>_COMPILER_LINKER",
  "CMAKE_<LANG>_COMPILER_LINKER_ID",
  "CMAKE_<LANG>_COMPILER_LINKER_VERSION" and
  "CMAKE_<LANG>_COMPILER_LINKER_FRONTEND_VARIANT" variables were added
  to describe the linker used by the language's link step.

* The "CMAKE_PROJECT_INCLUDE", "CMAKE_PROJECT_INCLUDE_BEFORE",
  "CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE", and "CMAKE_PROJECT_<PROJECT-
  NAME>_INCLUDE_BEFORE" variables learned to support a semicolon-
  separated list of CMake language files to be included sequentially.
  These variables can also reference module names to be found in
  "CMAKE_MODULE_PATH" or builtin to CMake.

* The "CMAKE_SKIP_TEST_ALL_DEPENDENCY" variable was added to control
  whether the "test" (or "RUN_TESTS") buildsystem target depends on
  the "all" (or "ALL_BUILD") target.

* A "CMAKE_TEST_LAUNCHER" variable and corresponding "TEST_LAUNCHER"
  target property were added to specify a launcher to be used by
  executable targets when invoked by tests added by the "add_test()"
  command.


Properties
----------

* The "CROSSCOMPILING_EMULATOR" target property now supports
  "generator expressions".

* The "EXPORT_FIND_PACKAGE_NAME" target property was added to allow
  targets to specify what package name to pass when exporting
  "find_dependency()" calls. This property is initialized with a new
  "CMAKE_EXPORT_FIND_PACKAGE_NAME" variable.

* The "UNITY_BUILD" target property now supports the Objective C
  ("OBJC") and Objective C++ ("OBJCXX") languages.

* The "XCODE_EMBED_XPC_SERVICES" target property was added to tell the
  "Xcode" generator what targets to put in the "Embed XPC Resources"
  build phase.


Modules
-------

* The "CMakePackageConfigHelpers" module gained new
  "generate_apple_platform_selection_file()" and
  "generate_apple_architecture_selection_file()" functions, which can
  be used to generate a file that includes another Apple-platform-
  specific file or the includes an architecture-specific
  implementation of a package for an Apple platform, respectively.

* The "FindOpenGL" module learned to find a GLU include directory
  different than the GL include directory.  A new
  "OPENGL_INCLUDE_DIRS" result variable provides all include
  directories.


CTest
-----

* "ctest(1)" gained a "--http-header" option to add custom headers on
  submission to CDash.

* "ctest(1)" gained the "--tests-from-file" and "--exclude-from-file"
  options to run or exclude tests named in a file.

* "ctest(1)" now supports job server integration on POSIX systems.

* The "ctest_test()" command gained options "INCLUDE_FROM_FILE" and
  "EXCLUDE_FROM_FILE" to run or exclude tests named in a file.


CPack
-----

* The "CPack DEB Generator" "CPACK_DEBIAN_FILE_NAME" variable may now
  be set without any suffix, and the ".deb" suffix will be added
  automatically.

* The "CPack RPM Generator" "CPACK_RPM_FILE_NAME" variable may now be
  set without any suffix, and the ".rpm" suffix will be added
  automatically.

* The "CPack WIX Generator" gained a new variable,
  "CPACK_WIX_INSTALL_SCOPE", to control the "InstallScope" property of
  WiX MSI installers.


Other Changes
=============

* CMake learned to de-duplicate libraries on link lines based on
  linker capabilities.  See policy "CMP0156".

* The "add_test()" command now honors "CMAKE_CROSSCOMPILING_EMULATOR"
  only when cross-compiling. See policy "CMP0158".

* "FetchContent_MakeAvailable()" now sets the
  "CMAKE_EXPORT_FIND_PACKAGE_NAME" variable for CMake projects.

* On Windows, when targeting the MSVC ABI, the "find_library()"
  command now accepts ".a" file names after first considering ".lib".
  This is symmetric with existing behavior when targeting the GNU ABI,
  in which the command accepts ".lib" file names after first
  considering ".a".

* On Windows, when targeting the MSVC ABI, the "find_library()"
  command now considers ".dll.lib" file names before ".lib".  This is
  the default suffix for DLL import libraries created by Rust
  toolchains for the MSVC ABI.

* The "Ninja" and "NMake Makefiles" generators now use the
  "-external:I" flag for system includes when using IntelLLVM as of
  version 2021.4. The "-external:W0" flag is also used as of version
  2022.2.

* The "create_test_sourcelist()" command now provides a full path to
  the generated driver source file.

* The "CPACK_PRODUCTBUILD_DOMAINS" variable now defaults to true. See
  policy "CMP0161".

* The "CPack WIX Generator" now produces WiX MSI installers that
  create start menu and uninstall entries for all users by default, as
  documented by the "CPACK_WIX_INSTALL_SCOPE" variable "perMachine"
  value.  Previously, without a custom WiX template, it produced
  installers that would only create start menu and uninstall entries
  for the current user, even though they install for all users.

----------------------------------------------------------------------------
Changes made since CMake 3.29.0-rc1:

Ben Boeckel (21):
  cmDyndepCollation: collapse full path before looking up
  Tests/CXXModules: support testing rebuild conditions
  cxxmodules: return failure from the collator when private usage is found
  Tests/CXXModules: test that objects depend on their modmap files
  cxxmodules: depend on the modmap contents
  cmNinjaTargetGenerator: use `emplace_back` for scanning deps
  Tests/CXXModules: test that objects depend on dependent modules json files
  cmNinjaTargetGenerator: scanning depends on the module metadata
  Tests/CXXModules: add a test to ensure that `restat` works for collation
  Ninja: make the collator rule use `restat = 1`
  Tests/CXXModules: document `CMake_TEST_MODULE_COMPILATION` items
  Tests/CXXModules: support building a project with `Ninja`
  Tests/CXXModules: add a test importing from a `Ninja` install
  cmGeneratorTarget: store synthetic targets in its cache
  Tests/CXXModules: add a test with transitive targets
  cmTarget: copy link libraries from the right properties
  Tests/CXXModules: test transitive modules usage
  cmExportFileGenerator: export link libraries as-is
  cmGeneratorTarget: discover synthetic targets recursively
  Tests/CXXModules: test `cxx_std_20` coming from a dependency
  Clang: detect -resource-dir for clang-scan-deps

Brad King (12):
  Tests: Remove unnecessary RunCMake.cmake_language expected result files
  cmake_language: Fix EXIT inside control flow blocks
  librhash: aligned_alloc is not available with glibc < 2.15
  Tests/CommandLength: Refactor test commands to reduce test run time
  ci: update to WiX 3.14.0.8606 release
  VS: Verify toolset version= field format more strictly
  VS: Fix '-T version=14.40' under VS 17.10 preview 1
  Tests: Fix BuildDepends on macOS arm64 without rosetta
  Help: Modernize BUILD_SHARED_LIBS documentation
  Tests: Update RunCMake.TargetObjects cmake_minimum_required version
  Restore support for TARGET_OBJECTS in link interfaces with unity builds
  CMake 3.29.0-rc2

Craig Scott (1):
  Help: Advise calling option(BUILD_SHARED_LIBS) early enough

Johannes Schultz (1):
  Help: Fix example for return command

Robert Maynard (1):
  Help: Explicitly discourage absolute install destinations

Ruslan Baratov (1):
  IPO: Support duplicate object names in large archives
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