When using the cc crate...

what is the proper way to set up build.rs and/or Cargo.toml so that cargo will automatically recompile and relink the C/C++ files if they are changed since the last compilation? Maybe even list the local header files so changing them will trigger recompilation/relink as well?

Alternatively, what is the proper way to force cargo to recompile all the C/C++ files?

Right now I can always remove the target/{debug,release} directories to force recompilation but it seems like a hack.