CMP0027ΒΆ
Conditionally linked imported targets with missing include directories.
CMake 2.8.11 introduced introduced the concept of
INTERFACE_INCLUDE_DIRECTORIES
, and a check at cmake time that the
entries in the INTERFACE_INCLUDE_DIRECTORIES
of an IMPORTED
target actually exist. CMake 2.8.11 also introduced generator expression
support in the target_link_libraries()
command. However, if an
imported target is linked as a result of a generator expression evaluation, the
entries in the 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 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 INTERFACE_INCLUDE_DIRECTORIES
of a generator-expression
conditionally linked IMPORTED
target does not exist.
This policy was introduced in CMake version 3.0.
It may be set by cmake_policy()
or cmake_minimum_required()
.
If it is not set, CMake warns, and uses OLD
behavior.
Note
The OLD
behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.