From fc9b8372f40bc611ca5df9a62dea00e8e8d3cfaa Mon Sep 17 00:00:00 2001
From: bigfarts <bigfarts@punymail.com>
Date: Mon, 29 Aug 2022 17:15:10 -0700
Subject: [PATCH] On darwin, explicitly set CMAKE_OSX_ARCHITECTURES to avoid
 creating fat libraries.

---
 src/lib.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 3c6bfd9..9a00b60 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -628,6 +628,16 @@ impl Config {
                 cmd.arg("-DCMAKE_OSX_SYSROOT=/");
                 cmd.arg("-DCMAKE_OSX_DEPLOYMENT_TARGET=");
             }
+        } else if target.contains("darwin") {
+            if !self.defined("CMAKE_OSX_ARCHITECTURES") {
+                if target.contains("x86_64") {
+                    cmd.arg("-DCMAKE_OSX_ARCHITECTURES=x86_64");
+                } else if target.contains("aarch64") {
+                    cmd.arg("-DCMAKE_OSX_ARCHITECTURES=arm64");
+                } else {
+                    panic!("unsupported darwin target: {}", target);
+                }
+            }
         }
         if let Some(ref generator) = generator {
             cmd.arg("-G").arg(generator);