From 724d9e3418f858953b0f91db1a0b4924c87cb240 Mon Sep 17 00:00:00 2001
From: Ronald Oussoren <ronaldoussoren@mac.com>
Date: Sat, 14 Nov 2020 12:17:16 +0100
Subject: [PATCH] bpo-42351: Avoid error when opening header with non-UTF8
 encoding

grep_headers_for() would error out when a header contained
text that cannot be interpreted as UTF-8.
---
 setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index c12b5f5042551a..91358af9b616b2 100644
--- a/setup.py
+++ b/setup.py
@@ -241,7 +241,7 @@ 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