> We run (or this is the default) cargo with `--bin`, which is > necessary for everything which needs to be compiled and features > a Cargo.toml.
All crates have a Cargo.toml file. The interesting crates are the ones with a Cargo.lock file. > To "build" libraries, we have to explicitly tell cargo to not > run/build/whatever with --bin ? Building libraries is currently not very useful at the moment, since they are not meant to be libraries in the C sense, but in the sense that it's a collection of source code that can be reused in a rust project. One can create a library in the C sense, but most crates do not do this and are not intended to be abi compatible with C. > Or do I have to interprete what I read a while ago "we just need > to copy the libraries to the store" as literally "if we encounter > no Cargo.toml, let's copy everything to the store as is"? If we encounter no Cargo.lock file it generally means the above.
