[rustc.git] / compiler / rustc_error_codes / src / error_codes / E0455.md

Linking with `kind=framework` is only supported when targeting macOS,
as frameworks are specific to that operating system.

Erroneous code example:

```ignore (should-compile_fail-but-cannot-doctest-conditionally-without-macos)
#[link(name = "FooCoreServices", kind = "framework")] extern "C" {}
// OS used to compile is Linux for example
```

To solve this error you can use conditional compilation:

```
#[cfg_attr(target="macos", link(name = "FooCoreServices", kind = "framework"))]
extern "C" {}
```

Learn more in the [Conditional Compilation][conditional-compilation] section
of the Reference.

[conditional-compilation]: https://doc.rust-lang.org/reference/attributes.html#conditional-compilation
Commit	Line	Data
60c5eb7d XL	1	Linking with `kind=framework` is only supported when targeting macOS,
	2	as frameworks are specific to that operating system.
	3
	4	Erroneous code example:
	5
	6	```ignore (should-compile_fail-but-cannot-doctest-conditionally-without-macos)
5869c6ff	7	#[link(name = "FooCoreServices", kind = "framework")] extern "C" {}
60c5eb7d XL	8	// OS used to compile is Linux for example
	9	```
	10
	11	To solve this error you can use conditional compilation:
	12
	13	```
	14	#[cfg_attr(target="macos", link(name = "FooCoreServices", kind = "framework"))]
5869c6ff	15	extern "C" {}
60c5eb7d XL	16	```
60c5eb7d XL	17
74b04a01 XL	18	Learn more in the [Conditional Compilation][conditional-compilation] section
	19	of the Reference.
	20
	21	[conditional-compilation]: https://doc.rust-lang.org/reference/attributes.html#conditional-compilation