i686_unknown_linux_musl.rs

use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, RustcAbi, StackProbeType, Target, base};

pub(crate) fn target() -> Target {
    let mut base = base::linux_musl::opts();
    base.rustc_abi = Some(RustcAbi::X86Sse2);
    // If you want to change the base CPU, please see `i686_unknown_linux_gnu.rs`
    // for an important comment.
    base.cpu = "pentium4".into();
    base.max_atomic_width = Some(64);
    base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32", "-Wl,-melf_i386"]);
    base.stack_probes = StackProbeType::Inline;
    // FIXME(compiler-team#422): musl targets should be dynamically linked by default.
    base.crt_static_default = true;

    // The unwinder used by i686-unknown-linux-musl, the LLVM libunwind
    // implementation, apparently relies on frame pointers existing... somehow.
    // It's not clear to me why nor where this dependency is introduced, but the
    // test suite does not pass with frame pointers eliminated and it passes
    // with frame pointers present.
    //
    // If you think that this is no longer necessary, then please feel free to
    // ignore! If it still passes the test suite and the bots then sounds good
    // to me.
    //
    // This may or may not be related to this bug:
    // https://llvm.org/bugs/show_bug.cgi?id=30879
    base.frame_pointer = FramePointer::Always;

    Target {
        llvm_target: "i686-unknown-linux-musl".into(),
        metadata: crate::spec::TargetMetadata {
            description: Some("32-bit Linux with musl 1.2.3".into()),
            tier: Some(2),
            host_tools: Some(false),
            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,
    }
}