CMake 3.26.0-rc1已准备好进行测试

CMake 3.26 Release Notes
************************Changes made since CMake 3.25 include the following.

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

Languages
———

* The “ASM_MARMASM” language was added to support the Microsoft ARM
assembler language.

Command-Line
————

* The “cmake -E copy” command-line tool now supports a “-t” argument.

* The “cmake -E copy_directory_if_different” command-line tool was
added.

Configure Log
————-

* CMake now writes a YAML log of configure-time checks to
“CMakeFiles/CMakeConfigureLog.yaml” under the top of the build tree.
See the “cmake-configure-log(7)” manual.

File-Based API
————–

* The “cmake-file-api(7)” “codemodel” version 2 “version” field has
been updated to 2.5.

* The “cmake-file-api(7)” “codemodel” version 2 “target” object gained
a new “fileSets” field and associated “fileSetIndex” field to
“sources” objects.

* The “cmake-file-api(7)” gained a new “configureLog” object kind that
enables stable access to the “cmake-configure-log(7)”.

Commands
——–

* The “add_custom_command()” and “add_custom_target()” commands now
support “generator expressions” in their “COMMENT” option.

* The “message()” command gained a “CONFIGURE_LOG” mode to record an
entry in the “cmake-configure-log(7)”.

* The “string(TIMESTAMP)” and “file(TIMESTAMP)” commands now support
the “%z” and “%Z” specifiers for the time zone.

* The “try_compile()” and “try_run()” commands gained a
“LOG_DESCRIPTION” option specifying text to be recorded in the
“cmake-configure-log(7)”.

* The “try_compile()” and “try_run()” commands gained a “NO_LOG”
option to skip recording a “cmake-configure-log(7)” entry.

Variables
———

* The “CMAKE__COMPILER_FRONTEND_VARIANT” variable is now set for
“GNU”, “MSVC”, and “AppleClang” compilers that have only one
frontend variant.

* A “CMAKE_VS_VERSION_BUILD_NUMBER” variable is now set by Visual
Studio Generators for VS 2017 and above to report the four-component
Visual Studio version number.

Properties
———-

* The “_CLANG_TIDY_EXPORT_FIXES_DIR” target property was added
to allow the “clang-tidy” tool to export its suggested fixes to a
set of “.yaml” files. A new
“CMAKE__CLANG_TIDY_EXPORT_FIXES_DIR” variable was created to
initialize this property.

* The “XCODE_EMBED_EXTENSIONKIT_EXTENSIONS” target property was added
to tell the “Xcode” generator to ExtensionKit-based extensions such
as extensions using the Background Assets framework. Aspects of the
embedding can be customized with:

* “XCODE_EMBED_EXTENSIONKIT_EXTENSIONS_PATH”

* “XCODE_EMBED_EXTENSIONKIT_EXTENSIONS_CODE_SIGN_ON_COPY”

* “XCODE_EMBED_EXTENSIONKIT_EXTENSIONS_REMOVE_HEADERS_ON_COPY”

Modules
——-

* The “ExternalProject” module “ExternalProject_Add()” command gained
an “INSTALL_BYPRODUCTS” option to specify files generated by the
“install” step.

* The “FindCUDAToolkit” module:

* gained support for the “sbsa-linux” cross compilation target, and

* now provides an imported target for “nvrtc_static”, if found.

* The “FindImageMagick” module now provides imported targets.

* The “FindPython3” and “FindPython” modules gained support for the
Stable Application Binary Interface.

* The “UseSWIG” module gained the support for the “perl5” language.

Generator Expressions
———————

* The “$” generator expression was added to
prevent usage requirements from being exported to dependent
projects.

CTest
—–

* The “CTEST_NO_TESTS_ACTION” environment variable was added to
provide a default value for the “–no-tests=” command line
argument of “ctest(1)”.

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

* The “CMakeFiles/CMakeOutput.log” and “CMakeFiles/CMakeError.log”
files are no longer populated by CMake’s builtin modules, and
“cmake(1)” no longer suggests looking at them after a “CMake Error”
occurs. Information previously logged to those files is instead
logged to “CMakeFiles/CMakeConfigureLog.yaml”, the “cmake-configure-
log(7)”.

* On CYGWIN, the undocumented “CMAKE_LEGACY_CYGWIN_WIN32” mode for
compatibility with CMake versions older than 2.8.4 has been removed.

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

* Language Standard Flags, such as “-std=c++11”, when generated due to
“target_compile_features()” or “CMAKE__STANDARD”, are now
placed before flags added by “target_compile_options()”, rather than
after them.

* For all “COMPILE_DEFINITIONS” properties, any leading “-D” on an
item is removed whether or not it was specified by a generator
expression.

* The “compile_commands.json” database enabled by
“CMAKE_EXPORT_COMPILE_COMMANDS” now provides the “output” field in
the compile commands objects. This allows multi-config generators,
such as the “Ninja Multi-Config” generator, to provide the compile
commands for all configurations.

* The “USE_FOLDERS” global property is treated as “ON” by default. See
policy “CMP0143”.

* The top-level “project()” call will now emit an author warning if
the documented command order in relation to
“cmake_minimum_required()” is not respected.

* The “cmake –trace” option now follows “try_compile()” and
“try_run()” invocations.