From 7f4ff7cf15f93759e8eae18cf8423035dba36c5e Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Thu, 18 Aug 2022 21:28:07 -0700
Subject: Rebuild on Linker change

---
 Makefile                      |  7 +++++++
 build.rs                      | 20 ++++++++++++++++++++
 src/bsp/raspberrypi/linker.ld |  1 +
 3 files changed, 28 insertions(+)
 create mode 100644 build.rs

diff --git a/Makefile b/Makefile
index d2b6c52..8c202d8 100644
--- a/Makefile
+++ b/Makefile
@@ -30,3 +30,10 @@ clean:
 
 run: build
 	qemu-system-arm -cpu cortex-a7 -m 1G -kernel target/armv7a-none-eabi/release/kernel -machine raspi2b -serial mon:stdio -nographic
+
+init:
+	rustup target install $(TARGET)
+	rustup target add $(TARGET)
+	rustup override set nightly
+	rustup component add llvm-tools-preview
+	cargo install cargo-binutils
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..721d6d6
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,20 @@
+use std::{env,fs,process};
+
+fn main() {
+	let ld_script_path = match env::var("LD_SCRIPT_PATH") {
+		Ok(var) => var,
+		_ => process::exit(0),
+	};
+
+	let files = fs::read_dir(ld_script_path).unwrap();
+	files
+		.filter_map(Result::ok)
+		.filter(|d| {
+			if let Some(e) = d.path().extension() {
+				e == "ld"
+			} else {
+				false
+			}
+		})
+		.for_each(|f| println!("cargo:rerun-if-changed={}", f.path().display()));
+}
diff --git a/src/bsp/raspberrypi/linker.ld b/src/bsp/raspberrypi/linker.ld
index daf4a05..2541a88 100644
--- a/src/bsp/raspberrypi/linker.ld
+++ b/src/bsp/raspberrypi/linker.ld
@@ -42,6 +42,7 @@ SECTIONS
 	/DISCARD/ :
 	{
 		*(.ARM.exidx);
+		*(.ARM.exidx*);
 		*(.ARM.extab.*);
 	}
 }
-- 
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