From 09b9701a17618939fa0746ff532449f933213a68 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
Date: Thu, 15 Apr 2021 11:32:15 +0200
Subject: [PATCH] Python modules check: Assert exit code, not empty output

Distutils is deprecated in Python 3.10+:
https://www.python.org/dev/peps/pep-0632/

When importing it, there is a warning:

    DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives

The configure script falsely assumed this is an error.
Instead, we now check for the exit code, which is more explicit.

In the long term, we need to migrate away from distutils, this is a stopgap measure only.
---
 Bindings/Python/bindings.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Bindings/Python/bindings.m4 b/Bindings/Python/bindings.m4
index 784418f0c..ee28525fc 100644
--- a/Bindings/Python/bindings.m4
+++ b/Bindings/Python/bindings.m4
@@ -40,7 +40,7 @@ else
    for python_module in sys distutils.sysconfig
    do
       python_error="`"${PYTHON}" -c "import ${python_module};" 2>&1`"
-      if test -n "${python_error}"
+      if test $? -ne 0
       then
          AC_MSG_WARN([Python module not found: ${python_module}: ${python_error}])
          PYTHON_OK=false