bjoernager/rust
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Auto merge of #109721 - QuinnPainter:armv4t-lld, r=petrochenkov

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Switch to LLD as default linker for {arm,thumb}v4t-none-eabi

The LLVM 16 update brought ARMv4t support to LLD. We should use it by default so users don't need to install an external linker.

cc `@Lokathor`
This commit is contained in:
bors 2023-04-01 01:55:16 +00:00
commit 87e6b621a2
3 changed files with 3 additions and 26 deletions
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11
compiler/rustc_target/src/spec/armv4t_none_eabi.rs
View file

@ -4,13 +4,6 @@
//!
//! Please ping @Lokathor if changes are needed.
//!
//! This target profile assumes that you have the ARM binutils in your path
//! (specifically the linker, `arm-none-eabi-ld`). They can be obtained for free
//! for all major OSes from the ARM developer's website, and they may also be
//! available in your system's package manager. Unfortunately, the standard
//! linker that Rust uses (`lld`) only supports as far back as `ARMv5TE`, so we
//! must use the GNU `ld` linker.
//!
//! **Important:** This target profile **does not** specify a linker script. You
//! just get the default link script when you build a binary for this target.
//! The default link script is very likely wrong, so you should use
@ -35,8 +28,8 @@ pub fn target() -> Target {
data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
options: TargetOptions {
abi: "eabi".into(),
linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::No),
linker: Some("arm-none-eabi-ld".into()),
linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
linker: Some("rust-lld".into()),
asm_args: cvs!["-mthumb-interwork", "-march=armv4t", "-mlittle-endian",],
// Force-enable 32-bit atomics, which allows the use of atomic load/store only.
// The resulting atomics are ABI incompatible with atomics backed by libatomic.

11
compiler/rustc_target/src/spec/thumbv4t_none_eabi.rs
View file

@ -4,19 +4,12 @@
//!
//! Please ping @Lokathor if changes are needed.
//!
//! This target profile assumes that you have the ARM binutils in your path
//! (specifically the linker, `arm-none-eabi-ld`). They can be obtained for free
//! for all major OSes from the ARM developer's website, and they may also be
//! available in your system's package manager. Unfortunately, the standard
//! linker that Rust uses (`lld`) only supports as far back as `ARMv5TE`, so we
//! must use the GNU `ld` linker.
//!
//! **Important:** This target profile **does not** specify a linker script. You
//! just get the default link script when you build a binary for this target.
//! The default link script is very likely wrong, so you should use
//! `-Clink-arg=-Tmy_script.ld` to override that with a correct linker script.
use crate::spec::{cvs, Cc, FramePointer, LinkerFlavor, Lld};
use crate::spec::{cvs, FramePointer};
use crate::spec::{PanicStrategy, RelocModel, Target, TargetOptions};
pub fn target() -> Target {
@ -36,8 +29,6 @@ pub fn target() -> Target {
data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
options: TargetOptions {
abi: "eabi".into(),
linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::No),
linker: Some("arm-none-eabi-ld".into()),
// extra args passed to the external assembler (assuming `arm-none-eabi-as`):
// * activate t32/a32 interworking