I am proud to announce the second* CMake 3.27 release candidate.
https://cmake.org/download/
Documentation is available at:
https://cmake.org/cmake/help/v3.27
Release notes appear below and are also published at
https://cmake.org/cmake/help/v3.27/release/3.27.html
*Note: The first release candidate, 3.27.0-rc1, was released but not announced
due to regressions discovered prior to the announcement process.
Some of the more significant changes in CMake 3.27 are:
-
“cmake(1)” now supports interactive debugging of the CMake language.
See the “–debugger” option. -
The Visual Studio Generators for VS 2015 and above learned to select
the Windows SDK version explicitly using a “version=” field in the
“CMAKE_GENERATOR_PLATFORM” variable. See Visual Studio Platform
Selection. -
Apple text-based stubs (i.e. “.tbd” files) may now be created for
shared libraries on macOS. See the “ENABLE_EXPORTS” property. -
The “SKIP_LINTING” source file property was added to suppress
target-wide code checks on specific sources. -
The “COMPILE_ONLY” generator expression was added to specify
compilation usage requirements without any linking requirements. -
Compatibility with versions of CMake older than 3.5 is now
deprecated and will be removed from a future version. Calls to
“cmake_minimum_required()” or “cmake_policy()” that set the policy
version to an older value now issue a deprecation diagnostic. -
The “FindCUDA” module, which has been deprecated since CMake 3.10,
has been removed by policy “CMP0146”. Port projects to CMake’s
first-class “CUDA” language support. -
The “FindPythonInterp” and “FindPythonLibs” modules, which have been
deprecated since CMake 3.12, have been removed by policy “CMP0148”.
Port projects to “FindPython3”, “FindPython2”, or “FindPython”. -
“cmake --build $dir --verbose” will now print the working directory
and command line used to perform the build.
CMake 3.27 Release Notes
Changes made since CMake 3.26 include the following.
New Features
Debugger
- “cmake(1)” now supports interactive debugging of the CMake language.
See the “–debugger” option.
Presets
-
“cmake-presets(7)” files now support schema version “7”.
-
“cmake-presets(7)” now supports “$penv{}” macro expansion in
“include” fields.
Generators
-
The Makefile and Ninja generators now support using the “–
dependency-file” linker flag, added by GNU Binutils 2.35 and LLVM’s
LLD 12.0.0, so that files read by the linker will cause a relink if
they change (typically modified timestamps). See the
“CMAKE_LINK_DEPENDS_USE_LINKER” variable. -
The Visual Studio Generators for VS 2015 and above learned to select
the Windows SDK version explicitly using a “version=” field in the
“CMAKE_GENERATOR_PLATFORM” variable. See Visual Studio Platform
Selection.
Languages
- The “CXX” language now treats source file extensions “.ccm”,
“.cxxm”, and “.c++m” as C++.
File-Based API
-
The “cmake-file-api(7)” “codemodel” version 2 “version” field has
been updated to 2.6. -
The “cmake-file-api(7)” “codemodel” version 2 “target” object gained
a new “frameworks” field in the “compileGroups” objects.
Platforms
- Apple text-based stubs (i.e. “.tbd” files) may now be created for
shared libraries on macOS. See the “ENABLE_EXPORTS” property.
Commands
-
The “add_custom_command()” command gained a new
“DEPENDS_EXPLICIT_ONLY” option to tell the Ninja Generators not to
add any dependencies implied by the target to which it is attached.
The “CMAKE_ADD_CUSTOM_COMMAND_DEPENDS_EXPLICIT_ONLY” variable was
added to enable “DEPENDS_EXPLICIT_ONLY” on all calls to
“add_custom_command()” command. -
The “cmake_file_api()” command was added for projects to add “CMake
file API” queries for the current CMake run. -
The “find_package()” command now searches prefixes specified by
upper-case “_ROOT” CMake variables and upper-case
“_ROOT” environment variables. See policy “CMP0144”. -
The “install(CODE)” and “install(SCRIPT)” commands now support the
“$<INSTALL_PREFIX>” generator expression.
Variables
-
The “CMAKE_DLL_NAME_WITH_SOVERSION” variable and associated
“DLL_NAME_WITH_SOVERSION” target property were added to optionally
append the “SOVERSION” to the filename of the “.dll” part of a
shared library on Windows. -
Variables “CMAKE_VS_DEBUGGER_COMMAND”,
“CMAKE_VS_DEBUGGER_COMMAND_ARGUMENTS”,
“CMAKE_VS_DEBUGGER_ENVIRONMENT”, and
“CMAKE_VS_DEBUGGER_WORKING_DIRECTORY” were added to initialize
corresponding target properties. -
The “CMAKE_VS_WINDOWS_TARGET_PLATFORM_MIN_VERSION” variable was
added to initialize the “VS_WINDOWS_TARGET_PLATFORM_MIN_VERSION”
target property on all targets when they are created.
Properties
-
A “CUDA_CUBIN_COMPILATION” target property was added to Object
Libraries to support compiling to “.cubin” files instead of host
object files. Currently only supported with NVIDIA. -
A “CUDA_FATBIN_COMPILATION” target property was added to Object
Libraries to support compiling to “.fatbin” files instead of host
object files. Currently only supported with NVIDIA. -
A “CUDA_OPTIX_COMPILATION” target property was added to Object
Libraries to support compiling to “.optixir” files instead of host
object files. Currently only supported with NVIDIA. -
The “_CLANG_TIDY”, “_CPPCHECK”, “_CPPLINT”, and
“_INCLUDE_WHAT_YOU_USE”, target properties now support
“generator expressions”. -
The “_LINKER_LAUNCHER” target property now supports “generator
expressions”. -
The “SKIP_LINTING” source file property was added to suppress
target-wide code checks on specific sources.
Modules
-
The “FindCUDAToolkit” module now provides an imported target for
“cudla”, and imported targets for CUPTI’s “nvperf” and “pcsampling”
components. -
The “FindDoxygen” module’s “doxygen_add_docs()” command gained a
“CONFIG_FILE” option to specify a custom doxygen configuration file. -
The “FindOpenGL” module gained support for components “GLES2” and
“GLES3”. -
The “FindwxWidgets” module now provides an imported target.
Generator Expressions
-
The “COMPILE_ONLY” generator expression was added to specify
compilation usage requirements without any linking requirements. -
“$LIST:...” generator expressions were added for query,
transformation, and ordering operations on lists. -
“$PATH:...” generator expressions for decomposition and
transformation operations learned to process lists of paths element-
wise.
Autogen
-
The “CMAKE_AUTOMOC_EXECUTABLE”, “CMAKE_AUTORCC_EXECUTABLE”, and
“CMAKE_AUTOUIC_EXECUTABLE” variables were added to initialize the
corresponding target properties as targets are created. -
The “AUTOGEN_USE_SYSTEM_INCLUDE” target property and corresponding
“CMAKE_AUTOGEN_USE_SYSTEM_INCLUDE” variable were added to explicitly
control whether autogen headers are considered system headers. -
The “INTERFACE_AUTOMOC_MACRO_NAMES” target property was added to
specify macro names for “moc” as a transitive usage requirement.
CTest
- The “TIMEOUT_SIGNAL_NAME” and “TIMEOUT_SIGNAL_GRACE_PERIOD” test
properties were added to specify a POSIX signal to send to a test
process when its timeout is reached.
CPack
- The “CPack Inno Setup Generator” was added to package using Inno
Setup.
Deprecated and Removed Features
-
Compatibility with versions of CMake older than 3.5 is now
deprecated and will be removed from a future version. Calls to
“cmake_minimum_required()” or “cmake_policy()” that set the policy
version to an older value now issue a deprecation diagnostic. -
The Extra Generators have been deprecated. IDEs may use the “cmake-
file-api(7)” to view CMake-generated project build trees. -
The “FindCUDA” module, which has been deprecated since CMake 3.10,
has been removed by policy “CMP0146”. Port projects to CMake’s
first-class “CUDA” language support. -
The “FindPythonInterp” and “FindPythonLibs” modules, which have been
deprecated since CMake 3.12, have been removed by policy “CMP0148”.
Port projects to “FindPython3”, “FindPython2”, or “FindPython”. -
The “Dart” and “FindDart” modules have been deprecated via policy
“CMP0145”. Port projects to the “CTest” module. -
The “Visual Studio 9 2008” generator is now deprecated and will be
removed in a future version of CMake.
Other Changes
-
“cmake --build $dir --verbose” will now print the working directory
and command line used to perform the build. -
The “ExternalProject” and “FetchContent” modules now resolve
relative “GIT_REPOSITORY” paths as relative to the parent project’s
remote, not as a relative local file system path. See “CMP0150”. -
The “ExternalProject” “configure” step no longer re-runs on every
build when the “UPDATE_DISCONNECTED” option is enabled. It will only
re-run if details of the “download”, “update”, or “patch” step
change. -
The “ExternalProject” “update” and “patch” steps now always re-run
if any of their details change, even if the “UPDATE_DISCONNECTED”
option is enabled. If using the “GIT” download method, and the
“GIT_TAG” is changed to a commit that is not already known locally,
an error is now issued instead of silently using the previous
“GIT_TAG”. -
The “FindPython”, “FindPython2” and “FindPython3” modules now
support the Windows ARM64 platform. -
The “file(GET_RUNTIME_DEPENDENCIES)” command now case-preserves DLL
names reported on Windows. They are still converted to lowercase
for filter matching. -
The “SYSTEM” target property is now honored for Apple Frameworks.
-
Visual Studio Generators, for VS 15.8 (2017) and newer, now build
custom commands in parallel. See policy “CMP0147”.
Changes made since CMake 3.27.0-rc1:
Ben Boeckel (1):
- Makefiles: quote
$(COLOR)expansions
Björn Esser (1):
- bootstrap: Add --(no-)system-cppdap configuration switch
Brad King (2):
- Modules: Restore unnecessary inclusions for compatibility
- CMake 3.27.0-rc2
Marc Chevrier (1):
- add_test: Restore support for empty test arguments