https://github.com/Kitware/CMake
Tip revision: d421274e3e11a0e6480358faa8a8e5cf48d7b3c2 authored by Brad King on 15 July 2020, 11:19:20 UTC
CMake 3.18.0
CMake 3.18.0
Tip revision: d421274
CMP0027.rst
CMP0027
-------
Conditionally linked imported targets with missing include directories.
CMake 2.8.11 introduced introduced the concept of
:prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES`, and a check at cmake time that the
entries in the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of an ``IMPORTED``
target actually exist. CMake 2.8.11 also introduced generator expression
support in the :command:`target_link_libraries` command. However, if an
imported target is linked as a result of a generator expression evaluation, the
entries in the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of that target were not
checked for existence as they should be.
The ``OLD`` behavior of this policy is to report a warning if an entry in
the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of a generator-expression
conditionally linked ``IMPORTED`` target does not exist.
The ``NEW`` behavior of this policy is to report an error if an entry in
the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of a generator-expression
conditionally linked ``IMPORTED`` target does not exist.
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