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Some linking kinds are target-specific and not supported on all platforms.
Linking with `kind=framework` is only supported when targeting macOS,
as frameworks are specific to that operating system.
Similarly, `kind=raw-dylib` is only supported when targeting Windows-like
platforms.
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
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