https://github.com/Kitware/CMake
Tip revision: b45f9b364382839995c76bc9794bb5ae8fb787b5 authored by Brad King on 01 November 2022, 17:10:48 UTC
CMake 3.25.0-rc3
CMake 3.25.0-rc3
Tip revision: b45f9b3
CMP0028.rst
CMP0028
-------
Double colon in target name means ``ALIAS`` or ``IMPORTED`` target.
CMake 2.8.12 and lower allowed the use of targets and files with double
colons in :command:`target_link_libraries`, with some buildsystem generators.
The use of double-colons is a common pattern used to namespace ``IMPORTED``
targets and ``ALIAS`` targets. When computing the link dependencies of
a target, the name of each dependency could either be a target, or a file
on disk. Previously, if a target was not found with a matching name, the name
was considered to refer to a file on disk. This can lead to confusing error
messages if there is a typo in what should be a target name.
See also the :prop_tgt:`LINK_LIBRARIES_ONLY_TARGETS` target property.
The ``OLD`` behavior for this policy is to search for targets, then files on
disk, even if the search term contains double-colons. The ``NEW`` behavior
for this policy is to issue a ``FATAL_ERROR`` if a link dependency contains
double-colons but is not an ``IMPORTED`` target or an ``ALIAS`` target.
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