CMake Warning \(dev\) at CMP0076-WARN/CMakeLists.txt:2 \(target_sources\):
  Policy CMP0076 is not set: target_sources\(\) command converts relative paths
  to absolute.  Run "cmake --help-policy CMP0076" for policy details.  Use
  the cmake_policy command to set the policy and suppress this warning.

  An interface source of target "publiclib" has a relative path.
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning \(dev\) at CMP0076-WARN/CMakeLists.txt:2 \(target_sources\):
  Policy CMP0076 is not set: target_sources\(\) command converts relative paths
  to absolute.  Run "cmake --help-policy CMP0076" for policy details.  Use
  the cmake_policy command to set the policy and suppress this warning.

  A private source from a directory other than that of target "publiclib" has
  a relative path.
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error in CMakeLists.txt:
  Target "publiclib" contains relative path in its INTERFACE_SOURCES:

    "CMP0076-WARN/subdir_empty_1.cpp"