From d9782f66445c9fa5d835ad29c23b22be85cde354 Mon Sep 17 00:00:00 2001
From: Ronald Oussoren <ronaldoussoren@mac.com>
Date: Sat, 14 Nov 2020 16:07:47 +0100
Subject: [PATCH] bpo-42351: Avoid error when opening header with non-UTF8
 encoding (GH-23279)

grep_headers_for() would error out when a header contained
text that cannot be interpreted as UTF-8.

cherry-picked from 7a27c7ed4b by Pedro Fonini <fonini@ip.tv>
---
 setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index 4aaa51e0d4..3556bbe041 100644
--- a/setup.py
+++ b/setup.py
@@ -184,7 +184,7 @@ def is_macosx_sdk_path(path):
 
 def grep_headers_for(function, headers):
     for header in headers:
-        with open(header, 'r') as f:
+        with open(header, 'r', errors='surrogateescape') as f:
             if function in f.read():
                 return True
     return False
-- 
2.34.1