rustc_target/spec/targets/
i686_unknown_linux_musl.rs

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1use crate::spec::{
2    Cc, FramePointer, LinkerFlavor, Lld, RustcAbi, StackProbeType, Target, TargetMetadata, base,
3};
4
5pub(crate) fn target() -> Target {
6    let mut base = base::linux_musl::opts();
7    base.rustc_abi = Some(RustcAbi::X86Sse2);
8    // If you want to change the base CPU, please see `i686_unknown_linux_gnu.rs`
9    // for an important comment.
10    base.cpu = "pentium4".into();
11    base.max_atomic_width = Some(64);
12    base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32", "-Wl,-melf_i386"]);
13    base.stack_probes = StackProbeType::Inline;
14    // FIXME(compiler-team#422): musl targets should be dynamically linked by default.
15    base.crt_static_default = true;
16
17    // The unwinder used by i686-unknown-linux-musl, the LLVM libunwind
18    // implementation, apparently relies on frame pointers existing... somehow.
19    // It's not clear to me why nor where this dependency is introduced, but the
20    // test suite does not pass with frame pointers eliminated and it passes
21    // with frame pointers present.
22    //
23    // If you think that this is no longer necessary, then please feel free to
24    // ignore! If it still passes the test suite and the bots then sounds good
25    // to me.
26    //
27    // This may or may not be related to this bug:
28    // https://llvm.org/bugs/show_bug.cgi?id=30879
29    base.frame_pointer = FramePointer::Always;
30
31    Target {
32        llvm_target: "i686-unknown-linux-musl".into(),
33        metadata: TargetMetadata {
34            description: Some("32-bit Linux with musl 1.2.3".into()),
35            tier: Some(2),
36            host_tools: Some(false),
37            std: Some(true),
38        },
39        pointer_width: 32,
40        data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
41            i128:128-f64:32:64-f80:32-n8:16:32-S128"
42            .into(),
43        arch: "x86".into(),
44        options: base,
45    }
46}
rustc_target/spec/targets/i686_unknown_linux_musl.rs

rustc_target/spec/targets/
i686_unknown_linux_musl.rs
