From c6a4ca5c9e8c7c9c4c3fd3140bf8b1fc97f5cbfc Mon Sep 17 00:00:00 2001
From: Justin Abene <jabene@gmail.com>
Date: Mon, 20 Aug 2018 00:42:07 -0400
Subject: [PATCH] Prevent "cannot use a string pattern on a bytes-like object"

Fixes #21207
---
 modules/mono/config.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/modules/mono/config.py b/modules/mono/config.py
index c4f8dcfde8e..70fd1a35f12 100644
--- a/modules/mono/config.py
+++ b/modules/mono/config.py
@@ -265,11 +265,13 @@ def pkgconfig_try_find_mono_root(mono_lib_names, sharedlib_ext):
 
 
 def pkgconfig_try_find_mono_version():
+    from compat import decode_utf8
+
     lines = subprocess.check_output(['pkg-config', 'monosgen-2', '--modversion']).splitlines()
     greater_version = None
     for line in lines:
         try:
-            version = LooseVersion(line)
+            version = LooseVersion(decode_utf8(line))
             if greater_version is None or version > greater_version:
                 greater_version = version
         except ValueError: