CMake 3.26.0-rc4 is ready for testing
February 22, 2023
I am proud to announce the fourth CMake 3.26 release candidate.
https://cmake.org/download/
Documentation is available at:
https://cmake.org/cmake/help/v3.26
Release notes appear below and are also published at
https://cmake.org/cmake/help/v3.26/release/3.26.html
Some of the more significant changes in CMake 3.26 are:
- The “ASM_MARMASM” language was added to support the Microsoft ARM
assembler language. - 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. - The “cmake-file-api(7)” “codemodel” version 2 “target” object gained
a new “fileSets” field and associated “fileSetIndex” field to
“sources” objects. - The “$<build_local_interface:…>” generator expression was added to
prevent usage requirements from being exported to dependent
projects. - Language Standard Flags, such as “-std=c++11”, when generated due to
“target_compile_features()” or “CMAKE_<lang>_STANDARD”, are now
placed before flags added by “target_compile_options()”, rather than
after them. - 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.
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_<lang>_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 "<lang>_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_<lang>_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 "<build_local_interface:...>" 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=<action>" 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_<lang>_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. ---------------------------------------------------------------------------- Changes made since CMake 3.26.0-rc3: Brad King (7): nghttp2: Drop unused configuration value from build within CMake nghttp2: Update import script to fix version header nghttp2: Update script to get nghttp2 1.52.0 Xcode: Restore suppression of header maps FindOpenSSL: Fix regression in dependency on threads BundleUtilities: Avoid unnecessary chmod in fixup_bundle_item CMake 3.26.0-rc4 Chuanqi Xu (1): cmCxxModuleMapper: Specify clang's BMI dependency with new form Kefu Chai (1): ci: use the latest clang-scan-deps options nghttp2 upstream (1): nghttp2 2023-02-13 (be049129)