From dfae2c6989d8fd277e77d0f4693a896ce2808049 Mon Sep 17 00:00:00 2001
From: Cheng <git@zcbenz.com>
Date: Thu, 10 Apr 2025 23:41:41 +0900
Subject: [PATCH] Fix MSVC build due to use of M_LN2 (#2058)

---
 mlx/backend/cpu/unary.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mlx/backend/cpu/unary.cpp b/mlx/backend/cpu/unary.cpp
index 89d1cafb3..eafe98866 100644
--- a/mlx/backend/cpu/unary.cpp
+++ b/mlx/backend/cpu/unary.cpp
@@ -1,5 +1,8 @@
 // Copyright © 2024 Apple Inc.
 
+// Required for using M_LN2 in MSVC.
+#define _USE_MATH_DEFINES
+
 #include <cassert>
 
 #include "mlx/backend/cpu/unary.h"