34 lines
1.4 KiB
ReStructuredText
34 lines
1.4 KiB
ReStructuredText
CMP0023
|
|
-------
|
|
|
|
Plain and keyword target_link_libraries signatures cannot be mixed.
|
|
|
|
CMake 2.8.12 introduced the target_link_libraries signature using the
|
|
PUBLIC, PRIVATE, and INTERFACE keywords to generalize the LINK_PUBLIC
|
|
and LINK_PRIVATE keywords introduced in CMake 2.8.7. Use of
|
|
signatures with any of these keywords sets the link interface of a
|
|
target explicitly, even if empty. This produces confusing behavior
|
|
when used in combination with the historical behavior of the plain
|
|
target_link_libraries signature. For example, consider the code:
|
|
|
|
::
|
|
|
|
target_link_libraries(mylib A)
|
|
target_link_libraries(mylib PRIVATE B)
|
|
|
|
After the first line the link interface has not been set explicitly so
|
|
CMake would use the link implementation, A, as the link interface.
|
|
However, the second line sets the link interface to empty. In order
|
|
to avoid this subtle behavior CMake now prefers to disallow mixing the
|
|
plain and keyword signatures of target_link_libraries for a single
|
|
target.
|
|
|
|
The OLD behavior for this policy is to allow keyword and plain
|
|
target_link_libraries signatures to be mixed. The NEW behavior for
|
|
this policy is to not to allow mixing of the keyword and plain
|
|
signatures.
|
|
|
|
This policy was introduced in CMake version 2.8.12. CMake version
|
|
|release| warns when the policy is not set and uses OLD behavior. Use
|
|
the cmake_policy command to set it to OLD or NEW explicitly.
|