472 lines
19 KiB
ReStructuredText
472 lines
19 KiB
ReStructuredText
CMake 3.0.0 Release Notes
|
|
*************************
|
|
|
|
.. only:: html
|
|
|
|
.. contents::
|
|
|
|
Changes made since CMake 2.8.12.2 include the following.
|
|
|
|
Documentation Changes
|
|
=====================
|
|
|
|
* The CMake documentation has been converted to reStructuredText and
|
|
now transforms via Sphinx (`<http://sphinx-doc.org>`__) into man and
|
|
html pages. This allows the documentation to be properly indexed
|
|
and to contain cross-references.
|
|
|
|
Conversion from the old internal documentation format was done by
|
|
an automatic process so some documents may still contain artifacts.
|
|
They will be updated incrementally over time.
|
|
|
|
A basic reStructuredText processor has been implemented to support
|
|
``cmake --help-command`` and similar command-line options.
|
|
|
|
* New manuals were added:
|
|
|
|
- :manual:`cmake-buildsystem(7)`
|
|
- :manual:`cmake-commands(7)`, replacing ``cmakecommands(1)``
|
|
and ``cmakecompat(1)``
|
|
- :manual:`cmake-developer(7)`
|
|
- :manual:`cmake-generator-expressions(7)`
|
|
- :manual:`cmake-generators(7)`
|
|
- :manual:`cmake-language(7)`
|
|
- :manual:`cmake-modules(7)`, replacing ``cmakemodules(1)``
|
|
- :manual:`cmake-packages(7)`
|
|
- :manual:`cmake-policies(7)`, replacing ``cmakepolicies(1)``
|
|
- :manual:`cmake-properties(7)`, replacing ``cmakeprops(1)``
|
|
- :manual:`cmake-qt(7)`
|
|
- :manual:`cmake-toolchains(7)`
|
|
- :manual:`cmake-variables(7)`, replacing ``cmakevars(1)``
|
|
|
|
* Release notes for CMake 3.0.0 and above will now be included with
|
|
the html documentation.
|
|
|
|
New Features
|
|
============
|
|
|
|
Syntax
|
|
------
|
|
|
|
* The CMake language has been extended with
|
|
:ref:`Bracket Argument` and :ref:`Bracket Comment`
|
|
syntax inspired by Lua long brackets::
|
|
|
|
set(x [===[bracket argument]===] #[[bracket comment]])
|
|
|
|
Content between equal-length open- and close-brackets is taken
|
|
literally with no variable replacements.
|
|
|
|
.. warning::
|
|
This syntax change could not be made in a fully compatible
|
|
way. No policy is possible because syntax parsing occurs before
|
|
any chance to set a policy. Existing code using an unquoted
|
|
argument that starts with an open bracket will be interpreted
|
|
differently without any diagnostic. Fortunately the syntax is
|
|
obscure enough that this problem is unlikely in practice.
|
|
|
|
Generators
|
|
----------
|
|
|
|
* A new :generator:`CodeLite` extra generator is available
|
|
for use with the Makefile or Ninja generators.
|
|
|
|
* A new :generator:`Kate` extra generator is available
|
|
for use with the Makefile or Ninja generators.
|
|
|
|
* The :generator:`Ninja` generator learned to use ``ninja`` job pools
|
|
when specified by a new :prop_gbl:`JOB_POOLS` global property.
|
|
|
|
Commands
|
|
--------
|
|
|
|
* The :command:`add_library` command learned a new ``INTERFACE``
|
|
library type. Interface libraries have no build rules but may
|
|
have properties defining
|
|
:manual:`usage requirements <cmake-buildsystem(7)>`
|
|
and may be installed, exported, and imported. This is useful to
|
|
create header-only libraries that have concrete link dependencies
|
|
on other libraries.
|
|
|
|
* The :command:`export()` command learned a new ``EXPORT`` mode that
|
|
retrieves the list of targets to export from an export set configured
|
|
by the :command:`install(TARGETS)` command ``EXPORT`` option. This
|
|
makes it easy to export from the build tree the same targets that
|
|
are exported from the install tree.
|
|
|
|
* The :command:`export` command learned to work with multiple dependent
|
|
export sets, thus allowing multiple packages to be built and exported
|
|
from a single tree. The feature requires CMake to wait until the
|
|
generation step to write the output file. This means one should not
|
|
:command:`include` the generated targets file later during project
|
|
configuration because it will not be available.
|
|
Use :ref:`Alias Targets` instead. See policy :policy:`CMP0024`.
|
|
|
|
* The :command:`install(FILES)` command learned to support
|
|
:manual:`generator expressions <cmake-generator-expressions(7)>`
|
|
in the list of files.
|
|
|
|
* The :command:`project` command learned to set some version variables
|
|
to values specified by the new ``VERSION`` option or to empty strings.
|
|
See policy :policy:`CMP0048`.
|
|
|
|
* The :command:`string` command learned a new ``CONCAT`` mode.
|
|
It is particularly useful in combination with the new
|
|
:ref:`Bracket Argument` syntax.
|
|
|
|
* The :command:`unset` command learned a ``PARENT_SCOPE`` option
|
|
matching that of the :command:`set` command.
|
|
|
|
* The :command:`include_external_msproject` command learned
|
|
to handle non-C++ projects like ``.vbproj`` or ``.csproj``.
|
|
|
|
* The :command:`ctest_update` command learned to update work trees
|
|
managed by the Perforce (p4) version control tool.
|
|
|
|
* The :command:`message` command learned a ``DEPRECATION`` mode. Such
|
|
messages are not issued by default, but may be issued as a warning if
|
|
:variable:`CMAKE_WARN_DEPRECATED` is enabled, or as an error if
|
|
:variable:`CMAKE_ERROR_DEPRECATED` is enabled.
|
|
|
|
* The :command:`target_link_libraries` command now allows repeated use of
|
|
the ``LINK_PUBLIC`` and ``LINK_PRIVATE`` keywords.
|
|
|
|
Variables
|
|
---------
|
|
|
|
* Variable :variable:`CMAKE_FIND_NO_INSTALL_PREFIX` has been
|
|
introduced to tell CMake not to add the value of
|
|
:variable:`CMAKE_INSTALL_PREFIX` to the
|
|
:variable:`CMAKE_SYSTEM_PREFIX_PATH` variable by default.
|
|
This is useful when building a project that installs some
|
|
of its own dependencies to avoid finding files it is about
|
|
to replace.
|
|
|
|
* Variable :variable:`CMAKE_STAGING_PREFIX` was introduced for use
|
|
when cross-compiling to specify an installation prefix on the
|
|
host system that differs from a :variable:`CMAKE_INSTALL_PREFIX`
|
|
value meant for the target system.
|
|
|
|
* Variable :variable:`CMAKE_SYSROOT` was introduced to specify the
|
|
toolchain SDK installation prefix, typically for cross-compiling.
|
|
This is used to pass a ``--sysroot`` option to the compiler and
|
|
as a prefix searched by ``find_*`` commands.
|
|
|
|
* Variable :variable:`CMAKE_<LANG>_COMPILER_TARGET` was introduced
|
|
for use when cross-compiling to specify the target platform in the
|
|
:ref:`toolchain file <Cross Compiling Toolchain>` specified by the
|
|
:variable:`CMAKE_TOOLCHAIN_FILE` variable.
|
|
This is used to pass an option such as ``--target=<triple>`` to some
|
|
cross-compiling compiler drivers.
|
|
|
|
* Variable :variable:`CMAKE_MAP_IMPORTED_CONFIG_<CONFIG>` has been
|
|
introduced to optionally initialize the
|
|
:prop_tgt:`MAP_IMPORTED_CONFIG_<CONFIG>` target property.
|
|
|
|
Properties
|
|
----------
|
|
|
|
* The :prop_dir:`ADDITIONAL_MAKE_CLEAN_FILES` directory property
|
|
learned to support
|
|
:manual:`generator expressions <cmake-generator-expressions(7)>`.
|
|
|
|
* A new directory property :prop_dir:`CMAKE_CONFIGURE_DEPENDS`
|
|
was introduced to allow projects to specify additional
|
|
files on which the configuration process depends. CMake will
|
|
re-run at build time when one of these files is modified.
|
|
Previously this was only possible to achieve by specifying
|
|
such files as the input to a :command:`configure_file` command.
|
|
|
|
* A new :ref:`Qt AUTORCC` feature replaces the need to
|
|
invoke ``qt4_add_resources()`` by allowing ``.qrc`` files to
|
|
be listed as target sources.
|
|
|
|
* A new :ref:`Qt AUTOUIC` feature replaces the need to
|
|
invoke ``qt4_wrap_ui()``.
|
|
|
|
* Test properties learned to support
|
|
:manual:`generator expressions <cmake-generator-expressions(7)>`.
|
|
This is useful to specify per-configuration values for test
|
|
properties like :prop_test:`REQUIRED_FILES` and
|
|
:prop_test:`WORKING_DIRECTORY`.
|
|
|
|
* A new :prop_test:`SKIP_RETURN_CODE` test property was introduced
|
|
to tell :manual:`ctest(1)` to treat a particular test return code as
|
|
if the test were not run. This is useful for test drivers to report
|
|
that certain test requirements were not available.
|
|
|
|
* New types of :ref:`Compatible Interface Properties` were introduced,
|
|
namely the :prop_tgt:`COMPATIBLE_INTERFACE_NUMBER_MAX` and
|
|
:prop_tgt:`COMPATIBLE_INTERFACE_NUMBER_MIN` for calculating numeric
|
|
maximum and minimum values respectively.
|
|
|
|
Modules
|
|
-------
|
|
|
|
* The :module:`CheckTypeSize` module ``check_type_size`` macro and
|
|
the :module:`CheckStructHasMember` module ``check_struct_has_member``
|
|
macro learned a new ``LANGUAGE`` option to optionally check C++ types.
|
|
|
|
* The :module:`ExternalData` module learned to work with no
|
|
URL templates if a local store is available.
|
|
|
|
* The :module:`ExternalProject` function ``ExternalProject_Add``
|
|
learned a new ``GIT_SUBMODULES`` option to specify a subset
|
|
of available submodules to checkout.
|
|
|
|
* A new :module:`FindBacktrace` module has been added to support
|
|
:command:`find_package(Backtrace)` calls.
|
|
|
|
* A new :module:`FindLua` module has been added to support
|
|
:command:`find_package(Lua)` calls.
|
|
|
|
* The :module:`FindBoost` module learned a new ``Boost_NAMESPACE``
|
|
option to change the ``boost`` prefix on library names.
|
|
|
|
* The :module:`FindBoost` module learned to control search
|
|
for libraies with the ``g`` tag (for MS debug runtime) with
|
|
a new ``Boost_USE_DEBUG_RUNTIME`` option. It is ``ON`` by
|
|
default to preserve existing behavior.
|
|
|
|
* The :module:`FindJava` and :module:`FindJNI` modules learned
|
|
to use a ``JAVA_HOME`` CMake variable or environment variable,
|
|
and then try ``/usr/libexec/java_home`` on OS X.
|
|
|
|
* The :module:`UseJava` module ``add_jar`` function learned a new
|
|
``MANIFEST`` option to pass the ``-m`` option to ``jar``.
|
|
|
|
* A new :module:`CMakeFindDependencyMacro` module was introduced with
|
|
a ``find_dependency`` macro to find transitive dependencies in
|
|
a :manual:`package configuration file <cmake-packages(7)>`. Such
|
|
dependencies are omitted by the listing of the :module:`FeatureSummary`
|
|
module.
|
|
|
|
* The :module:`FindQt4` module learned to create :ref:`Imported Targets`
|
|
for Qt executables. This helps disambiguate when using multiple
|
|
:manual:`Qt versions <cmake-qt(7)>` in the same buildsystem.
|
|
|
|
Generator Expressions
|
|
---------------------
|
|
|
|
* New ``$<PLATFORM_ID>`` and ``$<PLATFORM_ID:...>``
|
|
:manual:`generator expressions <cmake-generator-expressions(7)>`
|
|
have been added.
|
|
|
|
* The ``$<CONFIG>``
|
|
:manual:`generator expression <cmake-generator-expressions(7)>` now has
|
|
a variant which takes no argument. This is equivalent to the
|
|
``$<CONFIGURATION>`` expression.
|
|
|
|
* New ``$<UPPER_CASE:...>`` and ``$<LOWER_CASE:...>``
|
|
:manual:`generator expressions <cmake-generator-expressions(7)>`
|
|
generator expressions have been added.
|
|
|
|
* A new ``$<MAKE_C_IDENTIFIER:...>``
|
|
:manual:`generator expression <cmake-generator-expressions(7)>` has
|
|
been added.
|
|
|
|
Other
|
|
-----
|
|
|
|
* The :manual:`cmake(1)` ``-E`` option learned a new ``sleep`` command.
|
|
|
|
* The :manual:`ccmake(1)` dialog learned to honor the
|
|
:prop_cache:`STRINGS` cache entry property to cycle through
|
|
the enumerated list of possible values.
|
|
|
|
* The :manual:`cmake-gui(1)` dialog learned to remember window
|
|
settings between sessions.
|
|
|
|
* The :manual:`cmake-gui(1)` dialog learned to remember the type
|
|
of a cache entry for completion in the ``Add Entry`` dialog.
|
|
|
|
New Diagnostics
|
|
===============
|
|
|
|
* Directories named in the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES`
|
|
target property of imported targets linked conditionally by a
|
|
:manual:`generator expression <cmake-generator-expressions(7)>`
|
|
were not checked for existence. Now they are checked.
|
|
See policy :policy:`CMP0027`.
|
|
|
|
* Build target names must now match a validity pattern and may no longer
|
|
conflict with CMake-defined targets. See policy :policy:`CMP0037`.
|
|
|
|
* Build targets that specify themselves as a link dependency were
|
|
silently accepted but are now diagnosed. See :policy:`CMP0038`.
|
|
|
|
* The :command:`target_link_libraries` command used to silently ignore
|
|
calls specifying as their first argument build targets created by
|
|
:command:`add_custom_target` but now diagnoses this mistake.
|
|
See policy :policy:`CMP0039`.
|
|
|
|
* The :command:`add_custom_command` command used to silently ignore
|
|
calls specifying the ``TARGET`` option with a non-existent target
|
|
but now diagnoses this mistake. See policy :policy:`CMP0040`.
|
|
|
|
* Relative paths in the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES`
|
|
target property used to be silently accepted if they contained a
|
|
:manual:`generator expression <cmake-generator-expressions(7)>`
|
|
but are now rejected. See policy :policy:`CMP0041`.
|
|
|
|
* The :command:`get_target_property` command learned to reject calls
|
|
specifying a non-existent target. See policy :policy:`CMP0045`.
|
|
|
|
* The :command:`add_dependencies` command learned to reject calls
|
|
specifying a dependency on a non-existent target.
|
|
See policy :policy:`CMP0046`.
|
|
|
|
* Link dependency analysis learned to assume names containing ``::``
|
|
refer to :ref:`Alias Targets` or :ref:`Imported Targets`. It will
|
|
now produce an error if such a linked target is missing. Previously
|
|
in this case CMake generated a link line that failed at build time.
|
|
See policy :policy:`CMP0028`.
|
|
|
|
* When the :command:`project` or :command:`enable_language` commands
|
|
initialize support for a language, it is now an error if the full
|
|
path to the compiler cannot be found and stored in the corresponding
|
|
:variable:`CMAKE_<LANG>_COMPILER` variable. This produces nicer error
|
|
messages up front and stops processing when no working compiler
|
|
is known to be available.
|
|
|
|
* Target sources specified with the :command:`add_library` or
|
|
:command:`add_executable` command learned to reject items which
|
|
require an undocumented extra layer of variable expansion.
|
|
See policy :policy:`CMP0049`.
|
|
|
|
* Use of :command:`add_custom_command` undocumented ``SOURCE``
|
|
signatures now results in an error. See policy :policy:`CMP0050`.
|
|
|
|
Deprecated and Removed Features
|
|
===============================
|
|
|
|
* Compatibility options supporting code written for CMake versions
|
|
prior to 2.4 have been removed.
|
|
|
|
* Several long-outdated commands that should no longer be called
|
|
have been disallowed in new code by policies:
|
|
|
|
- Policy :policy:`CMP0029` disallows :command:`subdir_depends`
|
|
- Policy :policy:`CMP0030` disallows :command:`use_mangled_mesa`
|
|
- Policy :policy:`CMP0031` disallows :command:`load_command`
|
|
- Policy :policy:`CMP0032` disallows :command:`output_required_files`
|
|
- Policy :policy:`CMP0033` disallows :command:`export_library_dependencies`
|
|
- Policy :policy:`CMP0034` disallows :command:`utility_source`
|
|
- Policy :policy:`CMP0035` disallows :command:`variable_requires`
|
|
- Policy :policy:`CMP0036` disallows :command:`build_name`
|
|
|
|
* The :manual:`cmake(1)` ``-i`` wizard mode has been removed.
|
|
Instead use an interactive dialog such as :manual:`ccmake(1)`
|
|
or use the ``-D`` option to set cache values from the command line.
|
|
|
|
* The builtin documentation formatters that supported command-line
|
|
options such as ``--help-man`` and ``--help-html`` have been removed
|
|
in favor of the above-mentioned new documentation system. These and
|
|
other command-line options that used to generate man- and html-
|
|
formatted pages no longer work. The :manual:`cmake(1)`
|
|
``--help-custom-modules`` option now produces a warning at runtime
|
|
and generates a minimal document that reports the limitation.
|
|
|
|
* The :prop_dir:`COMPILE_DEFINITIONS_<CONFIG>` directory properties and the
|
|
:prop_tgt:`COMPILE_DEFINITIONS_<CONFIG>` target properties have been
|
|
deprecated. Instead set the corresponding :prop_dir:`COMPILE_DEFINITIONS`
|
|
directory property or :prop_tgt:`COMPILE_DEFINITIONS` target property and
|
|
use :manual:`generator expressions <cmake-generator-expressions(7)>` like
|
|
``$<CONFIG:...>`` to specify per-configuration definitions.
|
|
See policy :policy:`CMP0043`.
|
|
|
|
* The :prop_tgt:`LOCATION` target property should no longer be read from
|
|
non-IMPORTED targets. It does not make sense in multi-configuration
|
|
generators since the build configuration is not known while configuring
|
|
the project. It has been superseded by the ``$<TARGET_FILE>`` generator
|
|
expression. See policy :policy:`CMP0026`.
|
|
|
|
* The :prop_tgt:`COMPILE_FLAGS` target property is now documented
|
|
as deprecated, though no warning is issued. Use the
|
|
:prop_tgt:`COMPILE_OPTIONS` target property or the
|
|
:command:`target_compile_options` command instead.
|
|
|
|
* The :module:`GenerateExportHeader` module ``add_compiler_export_flags``
|
|
function is now deprecated. It has been superseded by the
|
|
:prop_tgt:`<LANG>_VISIBILITY_PRESET` and
|
|
:prop_tgt:`VISIBILITY_INLINES_HIDDEN` target properties.
|
|
|
|
Other Changes
|
|
=============
|
|
|
|
* The version scheme was changed to use only two components for
|
|
the feature level instead of three. The third component will
|
|
now be used for bug-fix releases or the date of development versions.
|
|
See the :variable:`CMAKE_VERSION` variable documentation for details.
|
|
|
|
* The default install locations of CMake itself on Windows and
|
|
OS X no longer contain the CMake version number. This allows
|
|
for easy replacement without re-generating local build trees
|
|
manually.
|
|
|
|
* Generators for Visual Studio 10 (2010) and later were renamed to
|
|
include the product year like generators for older VS versions:
|
|
|
|
- ``Visual Studio 10`` -> :generator:`Visual Studio 10 2010`
|
|
- ``Visual Studio 11`` -> :generator:`Visual Studio 11 2012`
|
|
- ``Visual Studio 12`` -> :generator:`Visual Studio 12 2013`
|
|
|
|
This clarifies which generator goes with each Visual Studio
|
|
version. The old names are recognized for compatibility.
|
|
|
|
* The :variable:`CMAKE_<LANG>_COMPILER_ID` value for Apple-provided
|
|
Clang is now ``AppleClang``. It must be distinct from upstream
|
|
Clang because the version numbers differ.
|
|
See policy :policy:`CMP0025`.
|
|
|
|
* The :variable:`CMAKE_<LANG>_COMPILER_ID` value for ``qcc`` on QNX
|
|
is now ``QCC``. It must be distinct from ``GNU`` because the
|
|
command-line options differ. See policy :policy:`CMP0047`.
|
|
|
|
* On 64-bit OS X the :variable:`CMAKE_HOST_SYSTEM_PROCESSOR` value
|
|
is now correctly detected as ``x86_64`` instead of ``i386``.
|
|
|
|
* On OS X, CMake learned to enable behavior specified by the
|
|
:prop_tgt:`MACOSX_RPATH` target property by default. This activates
|
|
use of ``@rpath`` for runtime shared library searches.
|
|
See policy :policy:`CMP0042`.
|
|
|
|
* The :command:`build_command` command now returns a :manual:`cmake(1)`
|
|
``--build`` command line instead of a direct invocation of the native
|
|
build tool. When using ``Visual Studio`` generators, CMake and CTest
|
|
no longer require :variable:`CMAKE_MAKE_PROGRAM` to be located up front.
|
|
Selection of the proper msbuild or devenv tool is now performed as
|
|
late as possible when the solution (``.sln``) file is available so
|
|
it can depend on project content.
|
|
|
|
* The :manual:`cmake(1)` ``--build`` command now shares its own stdout
|
|
and stderr pipes with the native build tool by default.
|
|
The ``--use-stderr`` option that once activated this is now ignored.
|
|
|
|
* The ``$<C_COMPILER_ID:...>`` and ``$<CXX_COMPILER_ID:...>``
|
|
:manual:`generator expressions <cmake-generator-expressions(7)>`
|
|
used to perform case-insensitive comparison but have now been
|
|
corrected to perform case-sensitive comparison.
|
|
See policy :policy:`CMP0044`.
|
|
|
|
* The builtin ``edit_cache`` target will no longer select
|
|
:manual:`ccmake(1)` by default when no interactive terminal will
|
|
be available (e.g. with :generator:`Ninja` or an IDE generator).
|
|
Instead :manual:`cmake-gui(1)` will be preferred if available.
|
|
|
|
* The :module:`ExternalProject` download step learned to
|
|
re-attempt download in certain cases to be more robust to
|
|
temporary network failure.
|
|
|
|
* The :module:`FeatureSummary` no longer lists transitive
|
|
dependencies since they were not directly requested by the
|
|
current project.
|
|
|
|
* The ``cmake-mode.el`` major Emacs editing mode has been cleaned
|
|
up and enhanced in several ways.
|
|
|
|
* Include directories specified in the
|
|
:prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of :ref:`Imported Targets`
|
|
are treated as ``SYSTEM`` includes by default when handled as
|
|
:ref:`usage requirements <Include Directories and Usage Requirements>`.
|