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CMake/Help/command/target_compile_definitions.rst
Deniz Bahadir fe4b25ec2f Teach target_* commands to set INTERFACE properties of IMPORTED targets
Now, several `INTERFACE_*` properties can be set on `IMPORTED` targets,
not only via `set_property` and `set_target_properties` but also via
`target_compile_definitions`, `target_compile_features`,
`target_compile_options`, `target_include_directories`, `target_sources`
and `target_link_libraries`.

Fixes: #15689
Issue: #17197
2017-10-26 09:11:04 -04:00

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target_compile_definitions
--------------------------
Add compile definitions to a target.
::
target_compile_definitions(<target>
<INTERFACE|PUBLIC|PRIVATE> [items1...]
[<INTERFACE|PUBLIC|PRIVATE> [items2...] ...])
Specify compile definitions to use when compiling a given ``<target>``. The
named ``<target>`` must have been created by a command such as
:command:`add_executable` or :command:`add_library` and must not be an
:ref:`ALIAS target <Alias Targets>`.
The ``INTERFACE``, ``PUBLIC`` and ``PRIVATE`` keywords are required to
specify the scope of the following arguments. ``PRIVATE`` and ``PUBLIC``
items will populate the :prop_tgt:`COMPILE_DEFINITIONS` property of
``<target>``. ``PUBLIC`` and ``INTERFACE`` items will populate the
:prop_tgt:`INTERFACE_COMPILE_DEFINITIONS` property of ``<target>``.
(:ref:`IMPORTED targets <Imported Targets>` only support ``INTERFACE`` items.)
The following arguments specify compile definitions. Repeated calls for the
same ``<target>`` append items in the order called.
Arguments to ``target_compile_definitions`` may use "generator expressions"
with the syntax ``$<...>``. See the :manual:`cmake-generator-expressions(7)`
manual for available expressions. See the :manual:`cmake-buildsystem(7)`
manual for more on defining buildsystem properties.