c705279bae
This change ony concerns directives that appear in the document body. The guidelines for inserting version directives: * Baseline version is CMake 3.0, i.e. directives start at 3.1. * Always use `.. versionadded::` directive, avoid ad-hoc version references. Exception: policy pages. * For new command signatures, put `versionadded` on a separate line after the signature. * For a group of new signatures in a new document section, a single version note at the beginning of the section is sufficient. * For new options, put `versionadded` on a separate line before option description. * If all the option descriptions in the list are short one-liners, it's fine to put `versionadded` on the same line as the description. * If multiple option descriptions in close proximity would have the same ..versionadded directive, consider adding a single directive after the list, mentioning all added options. * For compact value lists and sub-option lists, put a single `versionadded` directive after the list mentioning all additions. * When a change is described in a single paragraph, put `versionadded` into that paragraph. * When only part of the paragraph has changed, separate the changed part if it doesn't break the flow. Otherwise, write a follow-up clarification paragraph and apply version directive to that. * When multiple version directives are close by, order earlier additions before later additions. * Indent related lists and code blocks to include them in the scope of `versionadded` directive. Issue: #19715
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target_compile_features
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-----------------------
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.. versionadded:: 3.1
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Add expected compiler features to a target.
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.. code-block:: cmake
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target_compile_features(<target> <PRIVATE|PUBLIC|INTERFACE> <feature> [...])
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Specifies compiler features required when compiling a given target. If the
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feature is not listed in the :variable:`CMAKE_C_COMPILE_FEATURES`,
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:variable:`CMAKE_CUDA_COMPILE_FEATURES`, or :variable:`CMAKE_CXX_COMPILE_FEATURES`
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variables, then an error will be reported by CMake. If the use of the feature requires
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an additional compiler flag, such as ``-std=gnu++11``, the flag will be added
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automatically.
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The ``INTERFACE``, ``PUBLIC`` and ``PRIVATE`` keywords are required to
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specify the scope of the features. ``PRIVATE`` and ``PUBLIC`` items will
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populate the :prop_tgt:`COMPILE_FEATURES` property of ``<target>``.
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``PUBLIC`` and ``INTERFACE`` items will populate the
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:prop_tgt:`INTERFACE_COMPILE_FEATURES` property of ``<target>``.
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Repeated calls for the same ``<target>`` append items.
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.. versionadded:: 3.11
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Allow setting ``INTERFACE`` items on :ref:`IMPORTED targets <Imported Targets>`.
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The named ``<target>`` must have been created by a command such as
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:command:`add_executable` or :command:`add_library` and must not be an
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:ref:`ALIAS target <Alias Targets>`.
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Arguments to ``target_compile_features`` may use "generator expressions"
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with the syntax ``$<...>``.
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See the :manual:`cmake-generator-expressions(7)` manual for available
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expressions. See the :manual:`cmake-compile-features(7)` manual for
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information on compile features and a list of supported compilers.
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