From f040cc41c228c38c5811def9555493c1ad5f960b Mon Sep 17 00:00:00 2001
From: Michael R Sweet <msweet@msweet.org>
Date: Mon, 24 Jun 2024 09:03:46 -0400
Subject: [PATCH] Add #define guard to allow MingW to build PDFio; note that
 MingW is NOT a supported toolchain for PDFio (Issue #66)

---
 CHANGES.md      | 2 ++
 pdfio-private.h | 8 +++++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/CHANGES.md b/CHANGES.md
index 279c08a..1fce4fe 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,6 +8,8 @@ v1.3.0 (Month DD, YYYY)
 - Added `pdfioFileGetCatalog` API for accessing the root/catalog object of a
   PDF file (Issue #67)
 - Updated number support to avoid locale issues (Issue #61)
+- Updated the PDFio private header to allow compilation with MingW; note that
+  MingW is NOT a supported toolchain for PDFio (Issue #66)
 - Optimized string pool code.
 
 
diff --git a/pdfio-private.h b/pdfio-private.h
index 1a3efa2..d03b54f 100644
--- a/pdfio-private.h
+++ b/pdfio-private.h
@@ -38,9 +38,11 @@
 #    define unlink	_unlink
 #    define vsnprintf	_vsnprintf
 #    define write	_write
-#    define F_OK	00		// POSIX parameters/flags
-#    define W_OK	02
-#    define R_OK	04
+#    ifndef F_OK
+#      define F_OK	00		// POSIX parameters/flags
+#      define W_OK	02
+#      define R_OK	04
+#    endif // !F_OK
 #    define O_RDONLY	_O_RDONLY	// Map standard POSIX open flags
 #    define O_WRONLY	_O_WRONLY
 #    define O_CREAT	_O_CREAT