From 0dbb43436b849bbbc8c3f8f055e01d80936c206b Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Thu, 11 Apr 2024 07:59:01 +0000
Subject: Add O_ACCMODE fow Windows, in case it is not defined

---
 win/tclWinPort.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/win/tclWinPort.h b/win/tclWinPort.h
index 5e7f9c3..ef6918f 100644
--- a/win/tclWinPort.h
+++ b/win/tclWinPort.h
@@ -355,6 +355,9 @@ typedef DWORD_PTR * PDWORD_PTR;
 #ifndef R_OK
 #    define R_OK 04
 #endif
+#ifndef O_ACCMODE
+#    define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
+#endif
 
 /*
  * Define macros to query file type bits, if they're not already
-- 
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