CMake Error at CMP0023-NEW.cmake:11 \(target_link_libraries\): Policy CMP0023 is not set: Plain and keyword target_link_libraries signatures cannot be mixed. Run "cmake --help-policy CMP0023" for policy details. Use the cmake_policy command to set the policy and suppress this warning. The plain signature for target_link_libraries has already been used with the target "foo". All uses of target_link_libraries with a target must be either all-keyword or all-plain. The uses of the plain signature are here: \* CMP0023-NEW.cmake:10 \(target_link_libraries\) Call Stack \(most recent call first\): CMakeLists.txt:3 \(include\)