^CMake Warning \(dev\) at TARGETS-Defaults-Cache.cmake:[0-9]+ \(install\):
  Target lib3 has PRIVATE_HEADER files but no PRIVATE_HEADER DESTINATION.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning \(dev\) at TARGETS-Defaults-Cache.cmake:[0-9]+ \(install\):
  Target lib4 has PUBLIC_HEADER files but no PUBLIC_HEADER DESTINATION.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
This warning is for project developers.  Use -Wno-dev to suppress it.$