use crate::spec::{
    Arch, Cc, FramePointer, LinkerFlavor, Lld, SanitizerSet, StackProbeType, Target,
    TargetMetadata, TargetOptions, base,
};

pub(crate) fn target() -> Target {
    let mut base = base::linux_musl::opts();
    base.max_atomic_width = Some(128);
    base.supports_xray = true;
    base.features = "+v8a,+outline-atomics".into();
    base.stack_probes = StackProbeType::Inline;
    base.supported_sanitizers = SanitizerSet::ADDRESS
        | SanitizerSet::CFI
        | SanitizerSet::LEAK
        | SanitizerSet::MEMORY
        | SanitizerSet::THREAD;

    // FIXME(compiler-team#422): musl targets should be dynamically linked by default.
    base.crt_static_default = true;

    Target {
        llvm_target: "aarch64-unknown-linux-musl".into(),
        metadata: TargetMetadata {
            description: Some("ARM64 Linux with musl 1.2.5".into()),
            tier: Some(2),
            host_tools: Some(true),
            std: Some(true),
        },
        pointer_width: 64,
        data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32".into(),
        arch: Arch::AArch64,
        options: TargetOptions {
            // Enable the Cortex-A53 errata 843419 mitigation by default
            pre_link_args: TargetOptions::link_args(
                LinkerFlavor::Gnu(Cc::Yes, Lld::No),
                &["-Wl,--fix-cortex-a53-843419"],
            ),
            // the AAPCS64 expects use of non-leaf frame pointers per
            // https://github.com/ARM-software/abi-aa/blob/4492d1570eb70c8fd146623e0db65b2d241f12e7/aapcs64/aapcs64.rst#the-frame-pointer
            // and we tend to encounter interesting bugs in AArch64 unwinding code if we do not
            frame_pointer: FramePointer::NonLeaf,
             mcount: "\u{1}_mcount".into(), ..base
         },
    }
}
