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CMAKE_Swift_COMPILATION_MODE
----------------------------
.. versionadded:: 3.29
Specify how Swift compiles a target. This variable is used to initialize the
:prop_tgt:`Swift_COMPILATION_MODE` property on targets as they are created.
The allowed values are:
.. include:: ../prop_tgt/Swift_COMPILATION_MODE-VALUES.txt
Use :manual:`generator expressions <cmake-generator-expressions(7)>` to support
per-configuration specification. For example, the code:
.. code-block:: cmake
set(CMAKE_Swift_COMPILATION_MODE
"$<IF:$<CONFIG:Release>,wholemodule,incremental>")
sets the default Swift compilation mode to wholemodule mode when building a
release configuration and to incremental mode in other configurations.
If this variable is not set then the :prop_tgt:`Swift_COMPILATION_MODE` target
property will not be set automatically. If that property is unset then CMake
uses the default value ``incremental`` to build the Swift source files.
.. note::
This property only has effect when policy :policy:`CMP0157` is set to ``NEW``
prior to the first :command:`project` or :command:`enable_language` command
that enables the Swift language.
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