CMake Warning \(dev\) in CMakeLists.txt: Policy CMP0052 is not set: Reject source and build dirs in installed INTERFACE_INCLUDE_DIRECTORIES. Run "cmake --help-policy CMP0052" for policy details. Use the cmake_policy command to set the policy and suppress this warning. Directory: ".*Tests/RunCMake/IfacePaths_INCDIRS/prefix/src/foo" in INTERFACE_INCLUDE_DIRECTORIES of target "testTarget" is a subdirectory of the install directory: ".*Tests/RunCMake/IfacePaths_INCDIRS/prefix" however it is also a subdirectory of the source tree: ".*Tests/RunCMake/IfacePaths_INCDIRS/prefix/src" This warning is for project developers. Use -Wno-dev to suppress it.