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use crate::spec::{
Cc, LinkerFlavor, Lld, RustcAbi, SanitizerSet, StackProbeType, Target, TargetMetadata, base,
};
pub(crate) fn target() -> Target {
let mut base = base::linux_gnu::opts();
base.rustc_abi = Some(RustcAbi::X86Sse2);
// Dear distribution packager, if you are changing the base CPU model with the goal of removing
// the SSE2 requirement, make sure to also set the `rustc_abi` to `None` above or else the compiler
// will complain that the chosen ABI cannot be realized with the given CPU features.
// Also note that x86 without SSE2 is *not* considered a Tier 1 target by the Rust project, and
// it has some known floating-point correctness issues mostly caused by a lack of people caring
// for LLVM's x87 support (double-rounding, value truncation; see
// <https://github.com/rust-lang/rust/issues/114479> for details). This can lead to incorrect
// math (Rust generally promises exact math, so this can break code in unexpected ways) and it
// can lead to memory safety violations if floating-point values are used e.g. to access an
// array. If users run into such issues and report bugs upstream and then it turns out that the
// bugs are caused by distribution patches, that leads to confusion and frustration.
base.cpu = "pentium4".into();
base.max_atomic_width = Some(64);
base.supported_sanitizers = SanitizerSet::ADDRESS;
base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32"]);
base.stack_probes = StackProbeType::Inline;
Target {
llvm_target: "i686-unknown-linux-gnu".into(),
metadata: TargetMetadata {
description: Some("32-bit Linux (kernel 3.2, glibc 2.17+)".into()),
tier: Some(1),
host_tools: Some(true),
std: Some(true),
},
pointer_width: 32,
data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
i128:128-f64:32:64-f80:32-n8:16:32-S128"
.into(),
arch: "x86".into(),
options: base,
}
}
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