-## Env vars
-
-<dl>
- <dt>CG_CLIF_JIT</dt>
- <dd>Enable JIT mode to immediately run a program instead of writing an executable file.</dd>
- <dt>CG_CLIF_JIT_ARGS</dt>
- <dd>When JIT mode is enable pass these arguments to the program.</dd>
- <dt>CG_CLIF_INCR_CACHE_DISABLED</dt>
- <dd>Don't cache object files in the incremental cache. Useful during development of cg_clif
- to make it possible to use incremental mode for all analyses performed by rustc without caching
- object files when their content should have been changed by a change to cg_clif.</dd>
- <dt>CG_CLIF_DISPLAY_CG_TIME</dt>
- <dd>Display the time it took to perform codegen for a crate</dd>
-</dl>
+This will build your project with rustc_codegen_cranelift instead of the usual LLVM backend.
+
+For additional ways to use rustc_codegen_cranelift like the JIT mode see [usage.md](docs/usage.md).
+
+## Configuration
+
+See the documentation on the `BackendConfig` struct in [config.rs](src/config.rs) for all
+configuration options.