https://github.com/liblouis/liblouisxml/pull/7

commit 34cdeca863b17b3fc6f0d8e17186410c5878105c
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Wed Aug 20 10:03:09 2025 +0200

    libxml_errors: drop ATTRIBUTE_UNUSED
    
    libxml before 2.14 used to define it, but it's not part of its API, so
    we shouldn't have been using it.
    
    Fixes #6

diff --git a/liblouisxml/liblouisxml.c b/liblouisxml/liblouisxml.c
index e49360f..68c4a5a 100644
--- a/liblouisxml/liblouisxml.c
+++ b/liblouisxml/liblouisxml.c
@@ -46,7 +46,7 @@ lbx_version ()
 }
 
 static void
-liblouisxmlErrors (void *ctx ATTRIBUTE_UNUSED, const char *msg, ...)
+liblouisxmlErrors (void *ctx, const char *msg, ...)
 {
   va_list args;
   char buffer[MAXNAMELEN];
