I am proud to announce the third CMake 3.21 release candidate.
https://cmake.org/download/

Documentation is available at:
https://cmake.org/cmake/help/v3.21

Release notes appear below and are also published at
https://cmake.org/cmake/help/v3.21/release/3.21.html

Some of the more significant changes in CMake 3.21 are:

  • CMake learned to support “HIP” as a first-class language that can be
    enabled via the “project()” and “enable_language()” commands.
  • The “Visual Studio 17 2022” generator was added. This is
    experimental and based on “Visual Studio 2022 Preview 1.1” because
    this version of VS has not been released.
  • The Makefile Generators and the “Ninja” generator learned to add
    linker launcher tools along with the linker for “C”, “CXX”, “OBJC”,
    and “OBJCXX” languages. See the “CMAKE_<LANG>_LINKER_LAUNCHER”
    variable and “<LANG>_LINKER_LAUNCHER” target property for details.
  • “C_STANDARD”, “OBJC_STANDARD”, and the “Compile Features”
    functionality gained support for C17 and C23.
  • “cmake(1)” gained the “–toolchain <path/to/file>” command-line
    option to specify a toolchain file.
  • Messages printed to a terminal now may be colored by message type.
  • The Fujitsu compiler is now supported using compiler id “Fujitsu” in
    traditional (“Trad”) mode, and compiler id “FujitsuClang” in “Clang”
    mode.
  • The “add_custom_command()” command “DEPFILE” option:
    • may now use “generator expressions”,
    • is now supported by Visual Studio Generators for VS 2012 and
      above, and
    • is now supported by the “Xcode” generator.
  • The “add_custom_command(TARGET)” command (for Build Events) gained
    support for resolving target-dependent generator expressions.
  • The “install(TARGETS)” command gained new “RUNTIME_DEPENDENCIES” and
    “RUNTIME_DEPENDENCY_SET” arguments, which can be used to install
    runtime dependencies using “file(GET_RUNTIME_DEPENDENCIES)”.
  • A new “TARGET_RUNTIME_DLLS” generator expression was added.
  • “ctest(1)” gained a “–output-junit” option to write test results to
    a JUnit XML file.
  • The “ctest_build()” command gained a “PARALLEL_LEVEL” option.
  • “ARMClang” cpu/arch compile and link flags are no longer added
    automatically based on the “CMAKE_SYSTEM_PROCESSOR” variable or the
    undocumented “CMAKE_SYSTEM_ARCH” variable. They must be specified
    explicitly. See policy “CMP0123”.
  • The “foreach()” command now isolates loop variables in the loop
    scope. See policy “CMP0124” for details.
CMake 3.21 Release Notes
************************

Changes made since CMake 3.20 include the following.

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

Presets
-------

* "cmake-presets(7)" gained support for specifying the install prefix
  in a configure preset.

* "cmake-presets(7)" gained support for conditional enabling of
  presets.

* "cmake-presets(7)" gained support for a "${hostSystemName}" macro.

* "cmake-presets(7)" gained support for omitting the "generator" and
  "binaryDir" fields.

Generators
----------

* The Makefile Generators and the "Ninja" generator learned to add
  linker launcher tools along with the linker for "C", "CXX", "OBJC",
  and "OBJCXX" languages. See the "CMAKE_<LANG>_LINKER_LAUNCHER"
  variable and "<LANG>_LINKER_LAUNCHER" target property for details.

* The "Visual Studio 17 2022" generator was added.  This is
  experimental and based on "Visual Studio 2022 Preview 1.1" because
  this version of VS has not been released.

Languages
---------

* CMake learned to support "HIP" as a first-class language that can be
  enabled via the "project()" and "enable_language()" commands.

* "C_STANDARD", "OBJC_STANDARD", and the "Compile Features"
  functionality gained support for C17 and C23.

* Source file extensions ".ixx" and ".cppm" are now treated as C++.

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

* "cmake(1)" gained the "--install-prefix <dir>" command-line option
  to specify the location of the install prefix.

* "cmake(1)" gained the "--toolchain <path/to/file>" command-line
  option to specify a toolchain file.

* "cmake(1)" "-E capabilities" output, for some generators, may now
  contain a "supportedPlatforms" field listing platforms known to be
  supported in "CMAKE_GENERATOR_PLATFORM".

* Messages printed to a terminal now may be colored by message type.

Compilers
---------

* The Fujitsu compiler is now supported using compiler id "Fujitsu" in
  traditional ("Trad") mode, and compiler id "FujitsuClang" in "Clang"
  mode.

Platforms
---------

* CMake now supports the MSYS runtime environment, much like CYGWIN.

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

* The "cmake-file-api(7)" "codemodel" version 2 "version" field has
  been updated to 2.3.

* The "cmake-file-api(7)" "codemodel" version 2 gained a new
  "directory" object containing directory-level information. This
  includes a list of installers generated by the "install()" command.

Commands
--------

* The "add_custom_command()" command "DEPFILE" option may now use
  "generator expressions", is now supported by Visual Studio Generators
  for VS 2012 and above, and is now supported by the "Xcode" generator.

* The "add_custom_command(TARGET)" command (for Build Events) gained
  support for resolving target-dependent generator expressions.

* The "build_command()" command gained a "PARALLEL_LEVEL" option.

* The "file(COPY_FILE)" command was added to copy a single file.

* The "file(GET_RUNTIME_DEPENDENCIES)" command gained new
  "POST_INCLUDE_FILES" and "POST_EXCLUDE_FILES" arguments.

* The "file(REAL_PATH)" command gained the option "EXPAND_TILDE" to
  replace any leading tilde with the path to the user's home
  directory.

* The "file(RENAME)" command learned to optionally capture failure in
  a result variable.  It also gained a "NO_REPLACE" option to fail if
  the destination exists.

* The "install()" command gained a new "IMPORTED_RUNTIME_ARTIFACTS"
  mode, which can be used to install the runtime artifacts of imported
  targets.

* The "install()" command gained a new "RUNTIME_DEPENDENCY_SET" mode,
  which can be used to install runtime dependencies using
  "file(GET_RUNTIME_DEPENDENCIES)".

* The "install(TARGETS)" command gained new "RUNTIME_DEPENDENCIES" and
  "RUNTIME_DEPENDENCY_SET" arguments, which can be used to install
  runtime dependencies using "file(GET_RUNTIME_DEPENDENCIES)".

* The "install(SCRIPT|CODE)" command supports a new option
  "ALL_COMPONENTS" which allows the corresponding code to run for
  every component of a per component installation.

* The "project()" command now sets variables "PROJECT_IS_TOP_LEVEL"
  and "<PROJECT-NAME>_IS_TOP_LEVEL" to indicate whether it was called
  in a top-level "CMakeLists.txt" file.

Variables
---------

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

Properties
----------

* The "IMPORTED_TARGETS" directory property was added to get a list of
  Imported Targets created in the current directory.

* The "XCODE_EMBED_APP_EXTENSIONS" target property was added to tell
  the "Xcode" generator to embed app extensions such as iMessage
  sticker packs. Aspects of the embedding can be customized with the
  "XCODE_EMBED_APP_EXTENSIONS_PATH",
  "XCODE_EMBED_APP_EXTENSIONS_CODE_SIGN_ON_COPY" and
  "XCODE_EMBED_APP_EXTENSIONS_REMOVE_HEADERS_ON_COPY" properties.

Modules
-------

* The "FindBLAS" and "FindLAPACK" modules learned to support the
  serial "Fujitsu_SSL2" and parallel "Fujitsu_SSL2BLAMP" libraries.

* The "FindDevIL" module now provides imported targets.

* The "FindIconv" module now has version support.

* The "FindIntl" module now has version support.

* The "FindMPI" module learned to support "Fujitsu" and "FujitsuClang"
  in both host and cross compiling modes.

* The "FindMsys" module was added to find MSYS installations. Like
  "FindCygwin", it is used automatically by some other find modules to
  locate UNIX-style tools on Windows.

* The "FindOpenMP" module learned to support "Fujitsu" and
  "FujitsuClang".

* The "FindVulkan" module gained imported targets "Vulkan::Headers"
  and "Vulkan::glslangValidator".

* The "UseJava" module command "add_jar" gained a "RESOURCES" option
  to allow explicit naming of resources with non-optional namespace.

* The "UseSWIG" module use now standard library naming conventions for
  the "CSharp" language. See policy "CMP0122".

* The "UseSWIG" module now supports using the "swig" tool to generate
  implicit dependencies with the "Xcode" generator.

Generator Expressions
---------------------

* A new "TARGET_RUNTIME_DLLS" generator expression was added.

CTest
-----

* "ctest(1)" gained documentation for its ability to capture
  Additional Test Measurements.

* "ctest(1)" learned to recognize files attached to a test at run
  time. Previously it was only possible to attach files to tests at
  configure time by using the "ATTACHED_FILES" or
  "ATTACHED_FILES_ON_FAIL" test properties. See Additional Test
  Measurements for more information.

* "ctest(1)" gained a "--output-junit" option to write test results to
  a JUnit XML file.

* The "ctest_build()" command gained a "PARALLEL_LEVEL" option.

CPack
-----

* The "CPack DragNDrop Generator" gained option "CPACK_DMG_FILESYSTEM"
  to control the ".dmg" filesystem.

* The "CPack IFW Generator" now supports hyphens in names given to
  "cpack_ifw_configure_component()" or
  "cpack_ifw_configure_component_group()" as "DEPENDS" or
  "DEPENDENCIES" arguments.  This requires QtIFW 3.1 or later.

* The "CPack NSIS Generator" gained a new "CPACK_NSIS_EXECUTABLE"
  variable to specify the "makensis" executable to use instead of the
  default one.

* The "CPACK_CUSTOM_INSTALL_VARIABLES" variable was added to set
  variables in "cmake_install.cmake" script invocations made by CPack.

Deprecated and Removed Features
===============================

* Undocumented "CMAKE_SYSTEM_NAME" version-stripping behavior has been
  removed entirely. If it is set by a "-D" flag or by a "toolchain
  file", it is left unaltered, even if it still contains a version
  number. Similar "CMAKE_HOST_SYSTEM_NAME" version-stripping behavior,
  also undocumented, has been moved earlier, before "project()" or
  "enable_language()" is called.

* "ARMClang" cpu/arch compile and link flags are no longer added
  automatically based on the "CMAKE_SYSTEM_PROCESSOR" variable or the
  undocumented "CMAKE_SYSTEM_ARCH" variable. They must be specified
  explicitly.  See policy "CMP0123".

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

* The "find_file()", "find_path()", "find_program()", and
  "find_library()" commands handle cache variables in the same way
  regardless how they are defined. See policy "CMP0125" for details.

* The "find_file()", "find_path()", "find_program()", and
  "find_library()" commands gained the option "NO_CACHE" to store find
  result in normal variable.

* The "foreach()" command now isolates loop variables in the loop
  scope. See policy "CMP0124" for details.

* The "list()" command's "GET", "INSERT", "SUBLIST", and "REMOVE_AT"
  subcommands now error with invalid (i.e., non-integer) values are
  given as any of their index arguments based on the setting of policy
  "CMP0121".

* The "set(CACHE)" command no longer removes a normal variable of the
  same name, if any. See policy "CMP0126".

* "target_link_libraries()" calls referencing object libraries via the
  "TARGET_OBJECTS" generator expression now place the object files
  before all libraries on the link line, regardless of their specified
  order.  See documentation on Linking Object Libraries via
  $<TARGET_OBJECTS> for details.

* The Ninja Generators now pass source files and include directories
  to the compiler using absolute paths.  This makes diagnostic
  messages and debug symbols more consistent, and matches the Makefile
  Generators.

* The "NMake Makefiles" generator now encodes the generated makefiles
  as UTF-8 with a BOM when using "nmake" from VS 9 or above.

* The Visual Studio Generators for VS 2010 and above now place per-
  source preprocessor definitions after target-wide preprocssor
  definitions.  This makes VS consistent with the Ninja Generators and
  the Makefile Generators.

* The precompiled binaries provided on cmake.org now support "liblzma"
  multi-threading.  See the "CPACK_THREADS" and
  "CPACK_ARCHIVE_THREADS" variables.

----------------------------------------------------------------------------
Changes made since CMake 3.21.0-rc2:

Ben Boeckel (2):
  ci: update to 3.21.0-rc2 for CI usage
  gitlab-ci: upload JUnit reports for builds

Brad King (9):
  Help: Document VS generator support for Intel Fortran
  DetermineCompiler: Restore identification of MSVC with no INCLUDE or LIB
  Tests: Fix newline matching in several RunCMake.* cases
  gitlab-ci: Rename CI config variable to avoid conflict with CMAKE_BUILD_TYPE
  IntelLLVM: Fix C/C++ standard level flags on Windows
  Help: Document when OBJC_STANDARD values as definition list
  Help: Document when OBJCXX_STANDARD values were added
  Help: Document when CUDA_STANDARD values were added
  CMake 3.21.0-rc3

Craig Scott (3):
  Help: Add missing versionadded 3.21 for file(RENAME) options
  Help: Tighten install(SCRIPT) wording for ALL_COMPONENTS option
  Help: Improve readability and accuracy of runtime deps-related content

Gregor Jasny (1):
  Xcode: Ignore deprecated build system

Jean-Marc Hengen (1):
  IAR: Use placeholders in linker and archiver rules

Kyle Edwards (1):
  CMakePresets.json: Make --list-presets show presets with no generator

Marc Chevrier (1):
  Makefiles: Normalize compiler-generated depfile paths

Michael Hirsch (3):
  Help: Note C_STANDARD values added in CMake 3.21
  Help: Note CXX_STANDARD values added vs. CMake version
  Help: Note PROJECT_IS_TOP_LEVEL behavior w.r.t. ExternalProject

Robert Maynard (3):
  Correct CUDAToolkit_VERSION_MINOR variable name typo
  FindCUDAToolkit: Properly document the version support
  Check*CompilerFlag: Do not set result as a normal variable too

Leave a Reply

X