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CONTRIBUTING.md: Use build --stage 1 instead of build --stage 2

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It seems to work fine with `--stage 1` and it should be faster.
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Camelid 2020-10-30 14:33:12 -07:00
parent e4840ef4c9
commit bb59980b2d
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CONTRIBUTING.md
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@ -142,20 +142,20 @@ tracing) enabled.
The setup for a local rustc works as follows:
```sh
# Clone the rust-lang/rust repo.
git clone https://github.com/rust-lang/rust/ rustc
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`.
# Build a stage 2 rustc.
# Build a stage 1 rustc.
# This step can take 30 minutes or more.
./x.py build --stage 2 compiler/rustc
./x.py build --stage 1 compiler/rustc
# If you change something, you can get a faster rebuild by doing
./x.py build --keep-stage 0 --stage 2 compiler/rustc
./x.py build --keep-stage 0 --stage 1 compiler/rustc
# You may have to change the architecture in the next command
rustup toolchain link custom build/x86_64-unknown-linux-gnu/stage2
rustup toolchain link stage1 build/x86_64-unknown-linux-gnu/stage1
# Now cd to your Miri directory, then configure rustup
rustup override set custom
rustup override set stage1
```
With this, you should now have a working development setup! See