IF (${USE_BLACKLIST})
  ADD_LIBRARY(blacklist blacklist.cpp)

  TARGET_INCLUDE_DIRECTORIES(blacklist PUBLIC .)
  TARGET_COMPILE_DEFINITIONS(blacklist INTERFACE DEMO_USE_BLACKLIST=1) # <--- INTERFACE
ELSE()
  ADD_LIBRARY(blacklist INTERFACE)
  TARGET_COMPILE_DEFINITIONS(blacklist INTERFACE DEMO_USE_BLACKLIST=0) # <--- INTERFACE
ENDIF()