beta: only true stage0 needs feature(global_allocator) #52709
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We use `#[global_allocator]` for `stage0` builds of libstd, and also with `feature = "force_alloc_system"` that's set for a local rebuild, where the bootstrap compiler is the same version and otherwise uses the `--cfg stage1`. We only need the unstable `feature(global_allocator)` for a true `stage0` being 1.27. For rebuilds with 1.28, that feature is stable and causes a denied warning if it's enabled, so we should avoid it.
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Note that the master branch has removed this feature line altogether, so this patch is only needed on beta. |
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@bors: r+ |
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📌 Commit b0f15d3 has been approved by |
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🌲 The tree is currently closed for pull requests below priority 99, this pull request will be tested once the tree is reopened |
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…excrichton beta: only true stage0 needs feature(global_allocator) We use `#[global_allocator]` for `stage0` builds of libstd, and also with `feature = "force_alloc_system"` that's set for a local rebuild, where the bootstrap compiler is the same version and otherwise uses the `--cfg stage1`. We only need the unstable `feature(global_allocator)` for a true `stage0` being 1.27. For rebuilds with 1.28, that feature is stable and causes a denied warning if it's enabled, so we should avoid it.
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We use
#[global_allocator]forstage0builds of libstd, and alsowith
feature = "force_alloc_system"that's set for a local rebuild,where the bootstrap compiler is the same version and otherwise uses the
--cfg stage1.We only need the unstable
feature(global_allocator)for a truestage0being 1.27. For rebuilds with 1.28, that feature is stable and causes a
denied warning if it's enabled, so we should avoid it.