CMake 中的新变化
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This is an abbreviated version of the CMake changlog with just the highlights for authors. Names for each release are arbitrarily picked by the author.
There were a ton of additions to this version of CMake, primarily to fill out the target interface. Some bits of needed functionality were missed and implemented in CMake 3.1 instead.
New documentation
INTERFACE libraries
Project VERSION support
Exporting build trees easily
Bracket arguments and comments available (not widely used)
Lots of improvements
This is the first release of CMake to support C++11. Combined with fixes to the new features of CMake 3.0, this is currently a common minimum version of CMake for libraries that want to support old CMake builds.
C++11 Support
Compile features support
Sources can be added later with target_sources
Better support for generator expressions and INTERFACE targets
This is a smaller release, with mostly small features and fixes. Internal changes, like better Windows and UTF8 support, were the focus.
continue() inside loops
File and directory locks added
This is notable for the useful IN_LIST option for if, but it also added better library search using $PATH (See CMake 3.6), dependencies for INTERFACE libraries, and several other useful improvements. The addition of a COMPILE_LANGUAGE generator expression would prove very useful in the future as more languages are added. Makefiles now produce better output in parallel.
IN_LIST added to if
*_INCLUDE_WHAT_YOU_USE property added
COMPILE_LANGUAGE generator expression (limited support in some generators)
This release adds lots of useful tools, support for the Swift language, and the usual improvements. It also started supporting compiler launchers, like CCache.
Added Swift language
Added BASE_DIR to get_filename_component
if(TEST ...) added
string(APPEND ...) added
CMAKE_*_COMPILER_LAUNCHER added for make and ninja
TARGET_MESSAGES allow makefiles to print messages after target is completed
Imported targets are beginning to show up in the official Find*.cmake files
This release expanded CMake to more platforms, and make warnings easier to control from the command line.
Multiple input files supported for several of the cmake -E commands.
cmake_parse_arguments now builtin
Boost, GTest, and more now support imported targets
ARMCC now supported, better support for iOS
XCode backslash fix
This release added Clang-Tidy support, along with more utilities and improvements. It also removed the search of $PATH on Unix systems due to problems, instead users should use $CMAKE_PREFIX_PATH.
EXCLUDE_FROM_ALL for install
list(FILTER added
CMAKE_*_STANDARD_INCLUDE_DIRECTORIES and CMAKE_*_STANDARD_LIBRARIES added for toolchains
Try-compile improvements
*_CLANG_TIDY property added
External projects can now be shallow clones, and other improvements
You can now cross-compile to Android. Useful new if statement options really help clarify code. And the new server mode should (eventually?) improve integration with IDEs. Support for the VIM editor was also improved.
PARSE_ARGV mode for cmake_parse_arguments
Better 32-bit support on 64-bit machines
Lots of useful new if comparisons, like VERSION_GREATER_EQUAL (really, why did it take this long?)
LINK_WHAT_YOU_USE added
Lots of custom properties related to files and directories
CMake Server added
Added --trace-source="filename" to monitor certain files only
This adds CUDA as a language, as well as cxx_std_11 as a compiler meta-feature. The new generator expression could be really useful if you can require CMake 3.8+!
Native support for C# as a language
Native support for CUDA as a language
Meta features cxx_std_11 (and 14, 17) added
try_compile has better language support
BUILD_RPATH property added
COMPILE_FLAGS now supports generator expression
*_CPPLINT added
$<IF:cond,true-value,false-value> added (wow!)
Lots of fixes to CUDA support went into this release, including PTX support and MSVC generators. Interprocedural Optimizations are now supported properly. Even more modules provide imported targets, including MPI.
CUDA supported for Windows
Better object library support in several situations
DESCRIPTION added to project
separate_arguments gets NATIVE_COMMAND
INTERPROCEDURAL_OPTIMIZATION enforced (and CMAKE_* initializer added, CheckIPOSupported added, Clang and GCC support)
New GoogleTest module
FindDoxygen drastically improved
CMake now is built with C++11 compilers. Lots of useful improvements help write cleaner code.
Support for flang Fortran compiler
Compiler launcher added to CUDA
Indented #cmakedefines now supported for configure_file
include_guard() added to ensure a file gets included only once
string(PREPEND added
*_CPPCHECK property added
LABELS added to directories
FindMPI vastly expanded
FindOpenMP improved
Dynamic test discovery for GoogleTest
Fortran supports compiler launchers
Xcode and Visual Studio support COMPILE_LANGUAGE generator expressions finally
You can now add INTERFACE targets directly to IMPORTED INTERFACE libraries (Wow!)
Source file properties have been expanded
FetchContent module now allows downloads to happen at configure time (Wow)
Very powerful release, containing lots of smaller long-requested features. One of the smaller but immediately noticeable changes is the addition of version ranges; you can now set both the minimum and maximum known CMake version easily. You can also set CONFIGURE_DEPENDS on a GLOBed set of files, and the build system will check those files and rerun if needed! You can use the general PackageName_ROOT for all find_package searches. Lots of additions to strings and lists, module updates, shiny new Python find module (2 and 3 versions too), and many more.
Support for cmake_minimum_required ranges (backward compatible)
Support for -j,--parallel in --build mode (passed on to build tool)
Support for $<SHELL: shell strings (not deduplicated)
New FindPython module
string(JOIN and list(JOIN, and list(TRANSFORM
file(TOUCH and file(GLOB CONFIGURE_DEPENDS
C++20 support
CUDA as a language improvements: CUDA < 7.5 supported
Support for OpenMP on macOS (command line only)
Several new properties and property initializers
CPack finally reads CMAKE_PROJECT_VERSION variables
You can now make symbolic links on Windows! Lots of new functions that fill out the popular requests for CMake, such as add_link_options, target_link_directories, and target_link_options. You can now do quite a bit more modification to targets outside of the source directory, for better file separation. Generator expressions can be used in more places. And, target_sources finally handles relative paths properly.
New ctest --progress option for live output
target_link_options and add_link_options added
target_link_directories added
Symbolic link creation, -E create_symlink, supported on Windows
IPO supported on Windows
You can use -S and -B for source and build directories
target_link_libraries and install work outside the current target directory
STATIC_LIBRARY_OPTIONS property added
target_sources is now relative to the current source directory
This release is much faster. You can also finally directly add INTERFACE targets to IMPORTED libraries (the internal Find*.cmake scripts should become much cleaner eventually).