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Mention feature="foo" is a Cargo convention. #833

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Jun 16, 2020
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Mention feature="foo" is a Cargo convention. #833

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5 changes: 5 additions & 0 deletions src/conditional-compilation.md
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Expand Up @@ -64,6 +64,10 @@ configuration option from within the source code of the crate being compiled.
> **Note**: For `rustc`, arbitrary-set configuration options are set using the
> [`--cfg`] flag.

> **Note**: Configuration options with the key `feature` are a convention used
> by [Cargo][cargo-feature] for specifying compile-time options and optional
> dependencies.

<div class="warning">

Warning: It is possible for arbitrarily-set configuration options to have the
Expand Down Expand Up @@ -326,5 +330,6 @@ println!("I'm running on a {} machine!", machine_kind);
[`target_feature` attribute]: attributes/codegen.md#the-target_feature-attribute
[attribute]: attributes.md
[attributes]: attributes.md
[cargo-feature]: ../cargo/reference/features.html
[crate type]: linkage.md
[static C runtime]: linkage.md#static-and-dynamic-c-runtimes