From 6c094c1c1e8ec3b22d4c4af2c77bdcdb855a9132 Mon Sep 17 00:00:00 2001
From: Marc Chevrier <marc.chevrier@gmail.com>
Date: Wed, 23 Sep 2020 17:17:01 +0200
Subject: FindPython: Fix erroneous regex in ABI check

A regex added by commit 6fdfe2428d (FindPython: enhance ABI checks
against include directory, 2020-09-02, v3.18.3~17^2) was missing a
backslash.

Fixes: #21223
---
 Modules/FindPython/Support.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Modules/FindPython/Support.cmake b/Modules/FindPython/Support.cmake
index 42bb9fe..c8225c4 100644
--- a/Modules/FindPython/Support.cmake
+++ b/Modules/FindPython/Support.cmake
@@ -612,7 +612,7 @@ function (_PYTHON_GET_VERSION)
           if (NOT config)
             # pyconfig.h can be a wrapper to a platform specific pyconfig.h
             # In this case, try to identify ABI from include directory
-            if (_${_PYTHON_PREFIX}_INCLUDE_DIR MATCHES "python${version_major}\.${version_minor}+([dmu]*)")
+            if (_${_PYTHON_PREFIX}_INCLUDE_DIR MATCHES "python${version_major}\\.${version_minor}+([dmu]*)")
               set (abi "${CMAKE_MATCH_1}")
             else()
               set (abi "")
-- 
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