From 13c6d1b7108a6807d6b33c78e53eee1434d8f472 Mon Sep 17 00:00:00 2001
From: Felix Schwarz <felix.schwarz@oss.schwarz.eu>
Date: Sun, 5 Nov 2023 11:48:16 +0100
Subject: [PATCH] include unistd.h in _chunker.c

With Python 3.13, Python.h no longer includes the <unistd.h> standard header file:
https://docs.python.org/3.13/whatsnew/3.13.html#id8
---
 src/borg/_chunker.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/borg/_chunker.c b/src/borg/_chunker.c
index dd141e87b..e5d9b54f8 100644
--- a/src/borg/_chunker.c
+++ b/src/borg/_chunker.c
@@ -1,5 +1,8 @@
 #include <Python.h>
 #include <fcntl.h>
+#if !defined(_MSC_VER)
+#   include <unistd.h>
+#endif
 
 /* Cyclic polynomial / buzhash