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Update bootstrap documentation with the new envvars for RUSTFLAGS #970

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Nov 24, 2020
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Update bootstrap documentation with the new envvars for RUSTFLAGS #970

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8 changes: 2 additions & 6 deletions src/building/bootstrapping.md
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Expand Up @@ -309,12 +309,8 @@ The following tables indicate the outputs of various stage actions:
## Passing stage-specific flags to `rustc`

`x.py` allows you to pass stage-specific flags to `rustc` when bootstrapping.
The `RUSTFLAGS_STAGE_0`, `RUSTFLAGS_STAGE_1` and `RUSTFLAGS_STAGE_2`
environment variables pass the given flags when building stage 0, 1, and 2
artifacts respectively.

Additionally, the `RUSTFLAGS_STAGE_NOT_0` variable, as its name suggests, passes
the given arguments if the stage is not 0.
The `RUSTFLAGS_BOOTSTRAP` environment variable is passed as RUSTFLAGS to the bootstrap stage
(stage0), and `RUSTFLAGS_NOT_BOOTSTRAP` is passed when building artifacts for later stages.

## Environment Variables

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