rustc_target/spec/targets/
thumbv7a_pc_windows_msvc.rs

1use crate::spec::{
2    FloatAbi, LinkerFlavor, Lld, PanicStrategy, Target, TargetMetadata, TargetOptions, base,
3};
4
5pub(crate) fn target() -> Target {
6    let mut base = base::windows_msvc::opts();
7    // Prevent error LNK2013: BRANCH24(T) fixup overflow
8    // The LBR optimization tries to eliminate branch islands,
9    // but if the displacement is larger than can fit
10    // in the instruction, this error will occur. The linker
11    // should be smart enough to insert branch islands only
12    // where necessary, but this is not the observed behavior.
13    // Disabling the LBR optimization works around the issue.
14    base.add_pre_link_args(LinkerFlavor::Msvc(Lld::No), &["/OPT:NOLBR"]);
15
16    Target {
17        llvm_target: "thumbv7a-pc-windows-msvc".into(),
18        metadata: TargetMetadata {
19            description: None,
20            tier: Some(3),
21            host_tools: Some(false),
22            std: None, // ?
23        },
24        pointer_width: 32,
25        data_layout: "e-m:w-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
26        arch: "arm".into(),
27        options: TargetOptions {
28            llvm_floatabi: Some(FloatAbi::Hard),
29            features: "+vfp3,+neon".into(),
30            max_atomic_width: Some(64),
31            // FIXME(jordanrh): use PanicStrategy::Unwind when SEH is
32            // implemented for windows/arm in LLVM
33            panic_strategy: PanicStrategy::Abort,
34            ..base
35        },
36    }
37}