message: Removed custom processing of CMAKE_INSTALL_PREFIX
  Replaces legacy behaviour of keeping '/usr' as default install folder. New scenario - use default (mostly /usr/local) if user didn't defined CMAKE_INSTALL_PREFIX or use this var if user defined it
diff: @@ -75,12 +75,6 @@ endif(UNIX)
  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
  set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
  -if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT OR ${CMAKE_INSTALL_PREFIX} STREQUAL "/usr") # default is "/usr/local", pcm default is "/usr"
  - set(CMAKE_INSTALL_PREFIX "/usr" CACHE PATH "..." FORCE)
  -else()
  - set(CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}/usr" CACHE PATH "..." FORCE)
  -endif()
  -
  add_subdirectory(src)
  add_subdirectory(examples)
  add_subdirectory(tests)
  