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diff --git a/compiler/rustc_error_codes/src/error_codes/E0463.md b/compiler/rustc_error_codes/src/error_codes/E0463.md new file mode 100644 index 000000000..d0cd1b1dc --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0463.md @@ -0,0 +1,34 @@ +A plugin/crate was declared but cannot be found. + +Erroneous code example: + +```compile_fail,E0463 +#![feature(plugin)] +#![plugin(cookie_monster)] // error: can't find crate for `cookie_monster` +extern crate cake_is_a_lie; // error: can't find crate for `cake_is_a_lie` +``` + +You need to link your code to the relevant crate in order to be able to use it +(through Cargo or the `-L` option of rustc example). Plugins are crates as +well, and you link to them the same way. + +## Common causes + +- The crate is not present at all. If using Cargo, add it to `[dependencies]` + in Cargo.toml. +- The crate is present, but under a different name. If using Cargo, look for + `package = ` under `[dependencies]` in Cargo.toml. + +## Common causes for missing `std` or `core` + +- You are cross-compiling for a target which doesn't have `std` prepackaged. + Consider one of the following: + + Adding a pre-compiled version of std with `rustup target add` + + Building std from source with `cargo build -Z build-std` + + Using `#![no_std]` at the crate root, so you won't need `std` in the first + place. +- You are developing the compiler itself and haven't built libstd from source. + You can usually build it with `x.py build library/std`. More information + about x.py is available in the [rustc-dev-guide]. + +[rustc-dev-guide]: https://rustc-dev-guide.rust-lang.org/building/how-to-build-and-run.html#building-the-compiler |