From 20b5cf3e4d3d6279f45e7014a5108788a24763ba Mon Sep 17 00:00:00 2001
From: Logan McNaughton <848146+loganmc10@users.noreply.github.com>
Date: Thu, 2 Apr 2026 00:19:32 -0600
Subject: [PATCH] Improve MacOS opt flags (#705)

---
 .cargo/config.toml | 5 ++++-
 build.rs           | 4 +++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/.cargo/config.toml b/.cargo/config.toml
index 2174311f..1f1025e3 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -10,7 +10,10 @@ rustflags = ["-C", "link-arg=/STACK:8388608"]
 [target.'cfg(target_arch = "x86_64")']
 rustflags = ["-C", "target-cpu=x86-64-v3"]
 
-[target.'cfg(target_arch = "aarch64")']
+[target.'cfg(all(target_arch = "aarch64", target_os = "macos"))']
+rustflags = ["-C", "target-cpu=apple-m1"]
+
+[target.'cfg(all(target_arch = "aarch64", not(target_os = "macos")))']
 rustflags = ["-C", "target-cpu=cortex-a76"]
 
 [env]
diff --git a/build.rs b/build.rs
index ea98211f..1b108c0a 100644
--- a/build.rs
+++ b/build.rs
@@ -73,7 +73,9 @@ fn main() {
     let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
     let opt_flag = if arch == "x86_64" {
         "-march=x86-64-v3"
-    } else if arch == "aarch64" {
+    } else if arch == "aarch64" && os == "macos" {
+        "-march=armv8.4-a"
+    } else if arch == "aarch64" && os != "macos" {
         "-march=armv8.2-a"
     } else {
         panic!("unknown arch")