target_link_libraries() reports error if its only argument is not a target.
In CMake 2.8.2 and lower the
target_link_libraries() command silently ignored if it was called with only one argument, and this argument wasn’t a valid target. In CMake 2.8.3 and above it reports an error in this case.
This policy was introduced in CMake version 2.8.3. CMake version 3.19.0-rc3 warns when the policy is not set and uses
OLD behavior. Use the
cmake_policy() command to set it to
OLD behavior of a policy is
deprecated by definition and may be removed in a future version of CMake.
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