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Document fat LTO and codegen unit solution #55

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Jan 20, 2024
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Document fat LTO and codegen unit solution #55

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9 changes: 9 additions & 0 deletions README.md
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Expand Up @@ -91,6 +91,15 @@ enabled for the linker to deduce those do not panic.
lto = "thin"
```

If thin LTO doesn't work, the next step would be to try fat LTO with a single
codegen unit:

```toml
[profile.release]
lto = "fat"
codegen-units = 1
```

If you want no\_panic to just assume that some function you call doesn't panic,
and get Undefined Behavior if it does at runtime, see [dtolnay/no-panic#16]; try
wrapping that call in an `unsafe extern "C"` wrapper.
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