From 0d8f9520e92f1c50244035e96143fe9d1b5935ad Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Tue, 9 Sep 2025 01:05:20 +0200
Subject: [PATCH] CVaList support on MacOS aarch64.

---
 lib/std/core/cinterop.c3 | 11 +++++++++++
 releasenotes.md          |  1 +
 2 files changed, 12 insertions(+)

diff --git a/lib/std/core/cinterop.c3 b/lib/std/core/cinterop.c3
index 7888115d0..f20c6990f 100644
--- a/lib/std/core/cinterop.c3
+++ b/lib/std/core/cinterop.c3
@@ -59,3 +59,14 @@ macro typeid unsigned_int_from_bitsize(usz $bitsize) @private
 		$default: $error("Invalid bitsize");
 	$endswitch
 }
+
+module std::core::cinterop @if(env::MACOS && env::AARCH64);
+
+typedef CVaList = void*;
+macro CVaList.next(&self, $Type)
+{
+	void *ptr = mem::aligned_pointer((void*)*self, max($Type.alignof, 8));
+	defer *self = (CVaList)(ptr + 1);
+	return *($Type*)ptr;
+}
+
diff --git a/releasenotes.md b/releasenotes.md
index 16687dfb6..fb39ed3e4 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -26,6 +26,7 @@
   `path::public_share_directory`, `path::templates_directory`, `path::saved_games_directory`, `path::music_directory`, `path::downloads_directory`.
 - Add `LinkedList` array_view to support `[]` and `foreach`/`foreach_r`. #2438
 - Make `LinkedList` printable and add `==` operator. #2438
+- CVaList support on MacOS aarch64.
 
 ## 0.7.5 Change list