https://github.com/shevek/libspf2/pull/61

From 3857992da7e06b7bcb6fb77619929a2898c6a22c Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Wed, 11 Nov 2026 22:00:00 +0800
Subject: [PATCH] libreplace: convert K&R-style definition to ANSI C

C23 removes support for K&R-style function definitions, causing
__ns_get16.c to fail to compile when the compiler defaults to
or is explicitly invoked with that option:

> __ns_get16.c:15:12: error: unknown type name 'src'
> __ns_get16.c:15:16: error: expected ';' after top level declarator
> __ns_get16.c:17:1: error: expected identifier or '('

Signed-off-by: Z. Liu <zhixu.liu@gmail.com>

diff --git a/src/libreplace/__ns_get16.c b/src/libreplace/__ns_get16.c
index 805345d..21c9883 100644
--- a/src/libreplace/__ns_get16.c
+++ b/src/libreplace/__ns_get16.c
@@ -12,8 +12,7 @@
 
 
 u_int
-__ns_get16(src)
-	const u_char *src;
+__ns_get16(const u_char *src)
 {
         u_int dst;
 
-- 
2.49.1