Document use of `compiler_builtins` with `no_std` binaries See discussion in #43264. The docs for the `compiler_builtins_lib` feature were removed in PR #42899. But, though the `compiler_builtins` library has been migrated out-of-tree, the language feature remains, and is needed to use the stand-alone crate. So, we reintroduce the docs for the feature, and add a reference to them when describing how to create a `no_std` executable. |
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| Cargo.toml | ||