From 840ced943e01dd551e03cb78ed51aa5c8896ba1e Mon Sep 17 00:00:00 2001
From: Oleksandr Babak <alexanderbabak@proton.me>
Date: Wed, 1 Jul 2026 18:23:56 +0200
Subject: [PATCH] fix: add #[used] for autogenerated __INTERRUTS static

---
 CHANGELOG.md              | 2 ++
 src/generate/interrupt.rs | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24056472..01e9e5ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+- Add `#[used]` to the generated interrupt vector table statics so they are not
+  dropped by the linker with lto
 - Improve documentation for RISC-V settings file
 - Use marker struct instead of address in `Periph` with `PeripheralSpec` trait
 - Add `--skip-peripherals-struct` flag to skip generating the `Peripherals`
diff --git a/src/generate/interrupt.rs b/src/generate/interrupt.rs
index 3888ee46..88a14769 100644
--- a/src/generate/interrupt.rs
+++ b/src/generate/interrupt.rs
@@ -154,6 +154,7 @@ pub fn render(
                 #[doc(hidden)]
                 #link_section_attr
                 #nomangle
+                #[used]
                 pub static __INTERRUPTS: [Vector; #num_of_interrupts] = [
                     #elements
                 ];
@@ -228,6 +229,7 @@ pub fn render(
                 #[doc(hidden)]
                 #link_section_attr
                 #nomangle
+                #[used]
                 pub static __EXTERNAL_INTERRUPTS: [Vector; #num_of_interrupts] = [
                     #elements
                 ];
@@ -263,6 +265,7 @@ pub fn render(
                 #[doc(hidden)]
                 #link_section_attr
                 #nomangle
+                #[used]
                 pub static __INTERRUPTS: [Vector; #num_of_interrupts] = [
                     #elements
                 ];