From c46e7ca79d6262082ce66b91c0895801c20abd38 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Mon, 5 Apr 2021 22:37:57 +0900
Subject: [PATCH] bpo-43651: Fix EncodingWarning in sysconfig

---
 Lib/sysconfig.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
index 507c51f7642376..b8b1aca17e24d9 100644
--- a/Lib/sysconfig.py
+++ b/Lib/sysconfig.py
@@ -240,7 +240,8 @@ def _parse_makefile(filename, vars=None):
     done = {}
     notdone = {}
 
-    with open(filename, errors="surrogateescape") as f:
+    with open(filename, encoding=sys.getfilesystemencoding(),
+              errors="surrogateescape") as f:
         lines = f.readlines()
 
     for line in lines:
@@ -388,7 +389,7 @@ def _generate_posix_vars():
     # load the installed pyconfig.h:
     config_h = get_config_h_filename()
     try:
-        with open(config_h) as f:
+        with open(config_h, encoding="utf-8") as f:
             parse_config_h(f, vars)
     except OSError as e:
         msg = "invalid Python installation: unable to open %s" % config_h