# Clone the rust-lang/rust repo.
git clone https://github.com/rust-lang/rust rustc
cd rustc
-cp config.toml.example config.toml
-# Now edit `config.toml` and set `debug-assertions = true`.
+# Create a config.toml with defaults for working on miri.
+./x.py setup compiler
+ # Now edit `config.toml` and under `[rust]` set `debug-assertions = true`.
# Build a stage 1 rustc, and build the rustc libraries with that rustc.
# This step can take 30 minutes or more.
rustup override set stage1
```
+For more information about building and configuring a local compiler,
+see <https://rustc-dev-guide.rust-lang.org/building/how-to-build-and-run.html>.
+
With this, you should now have a working development setup! See
[above](#building-and-testing-miri) for how to proceed working on Miri.