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Feature-gate #![no_std] 

Fixes #21833.

[breaking-change]
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Keegan McAllister 2015-02-05 16:14:42 -08:00 committed by Manish Goregaokar
parent f59a3c9d4a
commit 5ced43062a
1 changed files with 6 additions and 0 deletions
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@ -2467,6 +2467,12 @@ The currently implemented features of the reference compiler are:
* `associated_types` - Allows type aliases in traits. Experimental.
* `no_std` - Allows the `#![no_std]` crate attribute, which disables the implicit
`extern crate std`. This typically requires use of the unstable APIs
behind the libstd "facade", such as libcore and libcollections. It
may also cause problems when using syntax extensions, including
`#[derive]`.
If a feature is promoted to a language feature, then all existing programs will
start to receive compilation warnings about #[feature] directives which enabled
the new feature (because the directive is no longer necessary). However, if a