From 4e94034e9231f5d8312497b7504f21b7a6062bf4 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Tue, 27 May 2025 16:12:01 -0700
Subject: [PATCH] Define ATTRIBUTE_UNUSED if its not defined

ATTRIBUTE_UNUSED is not defined in libxml2 2.14+, so check if the define is
not there then define it.

Fixes build errors e.g.
../xmlstarlet-1.6.1/src/xml_pyx.c:203:36: error: expected ')'
  203 | pyxExternalSubsetHandler(void *ctx ATTRIBUTE_UNUSED, const xmlChar *name,
      |                                    ^

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 src/xml_pyx.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/xml_pyx.c b/src/xml_pyx.c
index ab295f1..f1a1884 100644
--- a/src/xml_pyx.c
+++ b/src/xml_pyx.c
@@ -21,6 +21,13 @@
 
 #include "xmlstar.h"
 
+/**
+ * Unbreak build with libxml2 2.14
+ */
+#ifndef ATTRIBUTE_UNUSED
+#define ATTRIBUTE_UNUSED __attribute__((unused))
+#endif
+
 /**
  *  Output newline and tab characters as escapes
  *  Required both for attribute values and character data (#PCDATA)