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}