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. CMake version
3.19.8 warns when the policy is not set and uses OLD
behavior. Use
the cmake_policy()
command to set it to OLD
or NEW
explicitly.
Note
The OLD
behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.