Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Switch to LLD as default linker for {arm,thumb}v4t-none-eabi #109721

Merged
merged 1 commit into from
Apr 1, 2023
Merged

Switch to LLD as default linker for {arm,thumb}v4t-none-eabi #109721

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
11 changes: 2 additions & 9 deletions compiler/rustc_target/src/spec/armv4t_none_eabi.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand All @@ -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.
Expand Down
11 changes: 1 addition & 10 deletions compiler/rustc_target/src/spec/thumbv4t_none_eabi.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -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 {
Expand All @@ -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
Expand Down
7 changes: 0 additions & 7 deletions src/doc/rustc/src/platform-support/armv4t-none-eabi.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -17,13 +17,6 @@ specific with this target, so any ARMv4T device should work fine.

The target is cross-compiled, and uses static linking.

The linker that comes with rustc cannot link for this platform (the platform is
too old). You will need the `arm-none-eabi-ld` linker from a GNU Binutils
targeting ARM. This can be obtained for Windows/Mac/Linux from the [ARM
Developer Website][arm-dev], or possibly from your OS's package manager.

[arm-dev]: https://developer.arm.com/Tools%20and%20Software/GNU%20Toolchain

This target doesn't provide a linker script, you'll need to bring your own
according to the specific device you want to target. Pass
`-Clink-arg=-Tyour_script.ld` as a rustc argument to make the linker use
Expand Down