3 The tracking issue for this feature is: [#77933](https://github.com/rust-lang/rust/issues/77933).
5 ------------------------
7 This feature allows you to specify a path to a dynamic library to use as rustc's
8 code generation backend at runtime.
10 Set the `-Zcodegen-backend=<path>` compiler flag to specify the location of the
11 backend. The library must be of crate type `dylib` and must contain a function
12 named `__rustc_codegen_backend` with a signature of `fn() -> Box<dyn rustc_codegen_ssa::traits::CodegenBackend>`.
15 See also the [`hotplug_codegen_backend`](https://github.com/rust-lang/rust/tree/master/src/test/run-make-fulldeps/hotplug_codegen_backend) test
18 ```rust,ignore (partial-example)
19 use rustc_codegen_ssa::traits::CodegenBackend;
23 impl CodegenBackend for MyBackend {
24 // Implement codegen methods
28 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {