build on rpi 4 fails

[gingibash]

Compiling gstreamer-audio v0.17.2 error: linking with cc failed: exit status: 1

= note: /usr/bin/ld: cannot find -lndi collect2: error: ld returned 1 exit status

[sdroege]

You need to have libndi.so in your library search path, e.g. in /usr/lib or in a directory pointed to be RUSTFLAGS="-L/path/to/directory

[gingibash]

thanks @sdroege