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Auto merge of #42727 - alexcrichton:allocators-new, r=eddyb

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rustc: Implement the #[global_allocator] attribute

This PR is an implementation of [RFC 1974] which specifies a new method of
defining a global allocator for a program. This obsoletes the old
`#![allocator]` attribute and also removes support for it.

[RFC 1974]: https://github.com/rust-lang/rfcs/pull/1974

The new `#[global_allocator]` attribute solves many issues encountered with the
`#![allocator]` attribute such as composition and restrictions on the crate
graph itself. The compiler now has much more control over the ABI of the
allocator and how it's implemented, allowing much more freedom in terms of how
this feature is implemented.

cc #27389
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bors
2017-07-06 00:16:16 +00:00
parent 4d526e0d14 695dee063b
commit 1685c92986
115 changed files with 2860 additions and 1201 deletions
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src/rustllvm/llvm-rebuild-trigger
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@@ -1,4 +1,8 @@
# If this file is modified, then llvm will be (optionally) cleaned and then rebuilt.
# The actual contents of this file do not matter, but to trigger a change on the
# build bots then the contents should be changed so git updates the mtime.
<<<<<<< 37849a002ed91ac2b80aeb2172364b4e19250e05
2017-06-27
=======
2017-06-26
>>>>>>> rustc: Implement the #[global_allocator] attribute