CMP0131ΒΆ
New in version 3.24.
LINK_LIBRARIES supports the $<LINK_ONLY:...>
generator expression.
CMake 3.23 and below documented the $<LINK_ONLY:...> generator
expression only for use in INTERFACE_LINK_LIBRARIES.
When used in LINK_LIBRARIES, the content guarded inside
$<LINK_ONLY:...> was always used, even when collecting non-linking
usage requirements such as INTERFACE_COMPILE_DEFINITIONS.
CMake 3.24 and above prefer to support $<LINK_ONLY:...>, when
used in LINK_LIBRARIES, by using the guarded content only
for link dependencies and not other usage requirements. This policy
provides compatibility for projects that have not been updated to
account for this change.
The OLD behavior for this policy is to use LINK_LIBRARIES
content guarded by $<LINK_ONLY:...> even for non-linking
usage requirements. The NEW behavior for this policy is to use
the guarded content only for link dependencies.
This policy was introduced in CMake version 3.24. Use the
cmake_policy() command to set this policy to OLD or NEW
explicitly. Unlike many policies, CMake version 3.26.6 does not
warn when this policy is not set, and simply uses OLD behavior.
Note
The OLD behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.