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Disable DWARF in linker options for i686-unknown-uefi #136791

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merged 1 commit into from
Feb 10, 2025
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Disable DWARF in linker options for i686-unknown-uefi #136791

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9 changes: 8 additions & 1 deletion compiler/rustc_target/src/spec/targets/i686_unknown_uefi.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
// The cdecl ABI is used. It differs from the stdcall or fastcall ABI.
// "i686-unknown-windows" is used to get the minimal subset of windows-specific features.

use crate::spec::{RustcAbi, Target, base};
use crate::spec::{LinkerFlavor, Lld, RustcAbi, Target, add_link_args, base};

pub(crate) fn target() -> Target {
let mut base = base::uefi_msvc::opts();
Expand All @@ -24,6 +24,13 @@ pub(crate) fn target() -> Target {
base.features = "-mmx,-sse,+soft-float".into();
base.rustc_abi = Some(RustcAbi::X86Softfloat);

// Turn off DWARF. This fixes an lld warning, "section name .debug_frame is longer than 8
// characters and will use a non-standard string table". That section will not be created if
// DWARF is disabled.
//
// This is only needed in the i686 target due to using the `-gnu` LLVM target (see below).
add_link_args(&mut base.post_link_args, LinkerFlavor::Msvc(Lld::No), &["/DEBUG:NODWARF"]);

// Use -GNU here, because of the reason below:
// Background and Problem:
// If we use i686-unknown-windows, the LLVM IA32 MSVC generates compiler intrinsic
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