NS-3: undefined reference to `ns3::AnimationInterface::AnimationInterface

Suppose you're modifying code in `ns-3/examples/`

Locate `CMakeLists.txt` of your example code; e.g. mine's locate at `ns-3/examples/tcp/CMakeLists.txt`.

Add `${libnetanim}` to LIBRARIES_TO_LINK.

build_example(

NAME tcp-star-server

SOURCE_FILES tcp-star-server.cc

LIBRARIES_TO_LINK

${libpoint-to-point}

${libapplications}

${libinternet}

)

becomes

build_example(

NAME tcp-large-transfer

SOURCE_FILES tcp-large-transfer.cc

LIBRARIES_TO_LINK

${libpoint-to-point}

${libapplications}

${libinternet}

${libnetanim}

)

Old document only says `Add 'netanim' to your wscript`. This is how you solve it.