Changes made since CMake 3.14 include the following.
Preliminary support for the
Swiftlanguage was added to the
SWIFTCenvironment variable to specify a compiler.
Swift_MODULE_NAMEtarget property was added to customize the Swift module name.
Swift_DIAGNOSTICS_FILEsource property was added to indicate where to write the serialised Swift diagnostics.
The Swift support is experimental, not considered stable, and may change in future releases of CMake.
Clangcompiler variant on Windows that targets the MSVC ABI but has a GNU-like command line is now supported.
Support for the Clang-based ARM compiler was added with compiler id
Support was added for the IAR compiler architectures Renesas RX, RL78, RH850 and Texas Instruments MSP430.
Support was added for the IAR compilers built for Linux (IAR BuildLx).
CMAKE_GENERATORenvironment variable was added to specify a default generator to use when
cmake(1)is run without a
-Goption. Additionally, environment variables
CMAKE_GENERATOR_INSTANCEwere created to configure the generator.
--targetparameter gained support for multiple targets, e.g.
cmake --build . --target Library1 Library2. It now also has a short form
cmake --build . -t Library1 Library2.
cmake(1)command gained a new
--installoption. This may be used after building a project to run installation without using the generated build system or the native build tool.
cmake(1)command learned a new CLI option
-E remove_directorycommand-line tool learned to support removing multiple directories.
-E tartool has been improved:
It now continues adding files to an archive even if some of the files are not readable. This behavior is more consistent with the classic
It now parses all flags, and if an invalid flag was provided, a warning is issued.
It now displays an error if no action flag was specified, along with a list of possible actions:
It now supports extracting (
-x) or listing (
-t) only specific files or directories.
It now supports Zstandard compression with a
--zstdoption. Zstandard was designed to give a compression ratio comparable to that of the DEFLATE (zip) algorithm, but faster, especially for decompression.
ALIASoption learned to support import libraries of the
cmake_parse_arguments()command gained an additional
<prefix>_KEYWORDS_MISSING_VALUESoutput variable to report keyword arguments that were given by the caller with no values.
file(INSTALL)command learned a new argument,
FOLLOW_SYMLINK_CHAIN, which can be used to recursively resolve and install symlinks.
list()learned new sub-commands:
message()command learned new types:
string()learned a new sub-command
VS_JUST_MY_CODE_DEBUGGINGtarget property were added to enable the Just My Code feature of the Visual Studio Debugger when compiling with MSVC cl 19.05 and higher.
PRIVATE_HEADERproperties may now be set on Interface Libraries. The headers specified by those properties can be installed using the
install(TARGETS)command by passing the
VS_PROJECT_IMPORTtarget property was added to allow managed Visual Studio project files to import external
FindBoostmodule was reworked to expose a more consistent user experience between its "Config" and "Module" modes and with other find modules in general.
A new imported target
Boost::headersis now defined (same as
New output variables
QUIETargument passed to
find_package()is no longer ignored in config mode. Note that the CMake package shipped with Boost
QUIETargument passed to
find_package(). This is fixed in the next Boost release.
The input switch
Boost_VERSIONnow reports the version in
x.y.zformat in module mode. See policy
FindCupsmodule now provides imported targets.
FindGLEWmodule now provides an interface more consistent with what upstream GLEW provides in its own CMake package files.
FindPostgreSQLmodule learned to find debug and release variants separately.
UseSWIGmodule learned to manage alternate library names by passing
CSharplanguage to the
PLATFORM_IDlearned to support matching one value from a comma-separated list.
generator expressionswere added.
generator expressionhas been added.
generator expressionhas been added.
generator expressiongained support for a list of paths.
generator expressionswere added to retrieve the prefix, base name, and suffix of the file names of various artifacts:
generator expressionis now supported on
MODULElibraries and executables.
ctest_submit()command learned a new option:
BUILD_ID. This can be used to store the ID assigned to this build by CDash to a variable.
ctest_update()command learned to honor a new variable:
CTEST_UPDATE_VERSION_OVERRIDE. This can be used to specify the current version of your source tree rather than using the update command to discover the current version that is checked out.
CMAKE_AUTOMOC_RELAXED_MODEis considered deprecated. Support still exists but will be removed in future versions.
Xcodegenerator now requires at least Xcode 5.
An explicit deprecation diagnostic was added for policy
CMP0065and below were already deprecated). The
cmake-policies(7)manual explains that the OLD behaviors of all policies are deprecated and that projects should port to the NEW behaviors.
If a feature specified by
target_compile_features()is available in the compiler's default standard level, CMake 3.14 and below incorrectly added unnecessary
-std=flags that could lower the standard level. This bug has been fixed in CMake 3.15. This behavior change may expose bugs in existing projects that were relying on undocumented implementation details. Specifying compile features only ensures that the compiler runs in a mode that has those features, not that any specific standard level is used or explicit
CMake learned how to compile C++14 with the IBM AIX XL compiler and the SunPro compiler and to compile C++20 with the AppleClang compiler.
IBM Clang-based XL compilers that define
__ibmxl__now use the compiler id
XL. See policy
file(REMOVE_RECURSE)commands were changed to ignore empty arguments with a warning instead of treating them as a relative path and removing the contents of the current directory.
Changes made since CMake 3.15.0 include the following.
In CMake 3.15.0 support for the GNU-like
Clangcompiler targeting the MSVC ABI implemented
CMAKE_CXX_STANDARDvalues 98 and 11 using the corresponding
-std=flags. However, these modes do not work with the MSVC standard library. Therefore CMake 3.15.1 passes C++14 standard flags even for C++98 and C++11. This is consistent with MSVC itself which always runs in a mode aware of C++14.
Preliminary Swift support added in 3.15.0 has been updated.
CrayPrgEnvcompiler wrapper support has been updated for the 19.06 release of the Cray Programming Environment for which the default linking mode on XC Cray systems is now dynamic instead of static.