https://github.com/Kitware/CMake
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Tip revision: b45f9b364382839995c76bc9794bb5ae8fb787b5 authored by Brad King on 01 November 2022, 17:10:48 UTC
CMake 3.25.0-rc3
Tip revision: b45f9b3
CMP0040.rst
CMP0040
-------

The target in the ``TARGET`` signature of :command:`add_custom_command`
must exist and must be defined in the current directory.

CMake 2.8.12 and lower silently ignored a custom command created with
the ``TARGET`` signature of :command:`add_custom_command`
if the target is unknown or was defined outside the current directory.

The ``OLD`` behavior for this policy is to ignore custom commands
for unknown targets.  The ``NEW`` behavior for this policy is to report
an error if the target referenced in :command:`add_custom_command` is
unknown or was defined outside the current directory.

This policy was introduced in CMake version 3.0.  CMake version
|release| warns when the policy is not set and uses ``OLD`` behavior.
Use the :command:`cmake_policy` command to set it to ``OLD`` or
``NEW`` explicitly.

.. include:: DEPRECATED.txt
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