#2834: Change re module semantics, so that str and bytes mixing is forbidden,
and str (unicode) patterns get full unicode matching by default. The re.ASCII
flag is also introduced to ask for ASCII matching instead.
diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
index 3a120dd..b17743a 100644
--- a/Lib/distutils/sysconfig.py
+++ b/Lib/distutils/sysconfig.py
@@ -512,7 +512,7 @@
# patched up as well.
'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
flags = _config_vars[key]
- flags = re.sub('-arch\s+\w+\s', ' ', flags)
+ flags = re.sub('-arch\s+\w+\s', ' ', flags, re.ASCII)
flags = re.sub('-isysroot [^ \t]*', ' ', flags)
_config_vars[key] = flags