rtdlib-sys can call td for rust.

The first you need read td know how to build td.

And then, when you have tdjson dylib file (.so/.lib/.dll) copy the file to the path of the system $PATH variable.

Or set an environment RUSTFLAGS, in the development phase, you can set RUSTFLAGS environment to you IDE.

export RUSTFLAGS="-C link-args=-Wl,-rpath,/path/to/lib_dir"
cargo run

MSVC

RUSTFLAGS=-C link-args=-LIBPATH:D:/path/to/lib_dir