From 1c0eeb7cb32ad071d95380dc3bc79952cbabd98d Mon Sep 17 00:00:00 2001
From: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Date: Wed, 15 Jun 2022 23:05:15 -0400
Subject: [PATCH] Don't try to set _USE_MATH_DEFINES if already defined

---
 src/hb.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb.hh b/src/hb.hh
index d574f0881..8ec638a2b 100644
--- a/src/hb.hh
+++ b/src/hb.hh
@@ -183,7 +183,7 @@
 #include <cassert>
 #include <cfloat>
 #include <climits>
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(_USE_MATH_DEFINES)
 # define _USE_MATH_DEFINES
 #endif
 #include <cmath>