From 8db4198694030439e4adf1b22b6ef9ff082b086c Mon Sep 17 00:00:00 2001
From: Andrea Mazzoleni <amadvance@gmail.com>
Date: Mon, 18 May 2026 09:31:53 +0200
Subject: [PATCH] Portability

---
 cmdline/mingw.h    |  3 +++
 cmdline/portable.h | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/cmdline/mingw.h b/cmdline/mingw.h
index 6efd8842..35aed5cc 100644
--- a/cmdline/mingw.h
+++ b/cmdline/mingw.h
@@ -18,6 +18,9 @@
 #define HAVE_AVX2 1
 #endif
 
+/* map Windows name to POSIX name */
+#define strncasecmp _strnicmp
+
 /****************************************************************************/
 /* file */
 
diff --git a/cmdline/portable.h b/cmdline/portable.h
index 9862448b..725c175d 100644
--- a/cmdline/portable.h
+++ b/cmdline/portable.h
@@ -240,6 +240,24 @@
 #define HAVE_LOCKFILE 1
 #endif
 
+#ifdef HAVE_LINUX_CLOSE_RANGE_H
+#include <linux/close_range.h>
+#endif
+
+/* implement close_range for glibc 2.33 or earlier */
+#if defined(__linux__) && !defined(HAVE_CLOSE_RANGE)
+#include <sys/syscall.h>
+#ifndef __NR_close_range
+#define __NR_close_range 436
+#endif
+#define close_range close_range_impl
+static inline int close_range_impl(unsigned int first, unsigned int last, unsigned int flags)
+{
+	return syscall(__NR_close_range, first, last, flags);
+}
+#define HAVE_CLOSE_RANGE 1
+#endif
+
 /*
  * Flags for open()
  */