Update locally-built rustc instructions

This commit is contained in:
Camelid 2020-10-29 17:00:12 -07:00
parent 08ab8ce670
commit 1496462a89

View File

@ -141,19 +141,22 @@ 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
cd rustc
cp config.toml.example config.toml
# Now edit `config.toml` and set `debug-assertions = true`.
# This step can take 30 minutes and more.
./x.py build src/rustc
# Build a stage 2 rustc.
# This step can take 30 minutes or more.
./x.py build --stage 2 compiler/rustc
# If you change something, you can get a faster rebuild by doing
./x.py --keep-stage 0 build src/rustc
./x.py build --keep-stage 0 --stage 2 compiler/rustc
# You may have to change the architecture in the next command
rustup toolchain link custom build/x86_64-unknown-linux-gnu/stage2
# Now cd to your Miri directory, then configure rustup
rustup override set custom
```
With this, you should now have a working development setup! See
With this, you should now have a working development setup! See
[above](#building-and-testing-miri) for how to proceed working on Miri.