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Make optimize_attribute conditional on libstd #752

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Make optimize_attribute conditional on libstd #752

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12 changes: 11 additions & 1 deletion crates/as-if-std/src/lib.rs
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Expand Up @@ -2,7 +2,17 @@
// submodule into the standard library. We try to set this crate up similarly
// to the standard library itself to minimize the likelihood of issues when
// updating the `backtrace` crate.
#![feature(optimize_attribute)]
#![cfg_attr(
// Only used by the gimli backend, see src/symbolize/mod.rs
all(
backtrace_in_libstd,
feature = "backtrace",
any(unix, all(windows, target_env = "gnu")),
not(target_vendor = "uwp"),
not(target_os = "emscripten"),
),
feature(optimize_attribute)
)]
#![no_std]

extern crate alloc;
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