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Auto merge of #139734 - ChrisDenton:rollup-28qn740, r=ChrisDenton 

Rollup of 6 pull requests

Successful merges:

 - #139107 (std: make `cmath` functions safe)
 - #139607 (Add regression test for #127424)
 - #139691 (Document that `opt-dist` requires metrics to be enabled)
 - #139707 (Fix comment in bootstrap)
 - #139708 (Fix name of field in doc comment)
 - #139709 (bootstrap: fix typo in doc string)

r? `@ghost`
`@rustbot` modify labels: rollup
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src/building/optimized-build.md
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@ -109,11 +109,16 @@ like Python or LLVM.
Here is an example of how can `opt-dist` be used locally (outside of CI): Here is an example of how can `opt-dist` be used locally (outside of CI):
1. Build the tool with the following command: 1. Enable metrics in your `bootstrap.toml` file, because `opt-dist` expects it to be enabled:
```toml
[build]
metrics = true
```
2. Build the tool with the following command:
```bash ```bash
./x build tools/opt-dist ./x build tools/opt-dist
``` ```
2. Run the tool with the `local` mode and provide necessary parameters: 3. Run the tool with the `local` mode and provide necessary parameters:
```bash ```bash
./build/host/stage0-tools-bin/opt-dist local \ ./build/host/stage0-tools-bin/opt-dist local \
--target-triple <target> \ # select target, e.g. "x86_64-unknown-linux-gnu" --target-triple <target> \ # select target, e.g. "x86_64-unknown-linux-gnu"