rustc_target/spec/targets/
i686_unknown_linux_musl.rs

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