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Mention why we need extern crate panic_halt.

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Andrew Walbran
2023-03-20 14:24:44 +00:00
parent 4f9b354019
commit 6dd2a9f002
1 changed files with 2 additions and 0 deletions
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src/bare-metal/alloc.md
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@@ -15,5 +15,7 @@ To use `alloc` you must implement a
allocate regions of up to 2**32 bytes. allocate regions of up to 2**32 bytes.
* If any crate in your dependency tree depends on `alloc` then you must have exactly one global * If any crate in your dependency tree depends on `alloc` then you must have exactly one global
allocator defined in your binary. Usually this is done in the top-level binary crate. allocator defined in your binary. Usually this is done in the top-level binary crate.
* `extern crate panic_halt as _` is necessary to ensure that the `panic_halt` crate is linked in so
we get its panic handler.
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