main
  SFML (subtree synced with the official git repo)
  src
    <various modules>
    General (here lies the binary)

sfml‑system
sfml‑window
sfml‑network
sfml‑graphics
sfml‑audio
sfml‑main

add_executable(main ${main_SRCS})
target_link_libraries (main
  sfml‑system
  sfml‑window
  sfml‑network
  sfml‑graphics
  sfml‑audio
  sfml‑main
  # Other stuff here
)

/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lsfml‑system
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lsfml‑window
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lsfml‑network
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lsfml‑graphics
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lsfml‑audio
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.2/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lsfml‑main