Nothing uses vlog() apart from log.c, make sure it stays like this.

-- 
:wq Claudio

Index: log.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/log.c,v
diff -u -p -r1.64 log.c
--- log.c	21 Mar 2017 12:06:55 -0000	1.64
+++ log.c	29 Apr 2026 13:49:39 -0000
@@ -30,6 +30,9 @@ static int		 debug;
 static int		 verbose;
 static const char	*log_procname;
 
+static void	vlog(int, const char *, va_list)
+		    __attribute__((__format__ (printf, 2, 0)));
+
 void
 log_init(int n_debug, int facility)
 {
@@ -74,7 +77,7 @@ logit(int pri, const char *fmt, ...)
 	va_end(ap);
 }
 
-void
+static void
 vlog(int pri, const char *fmt, va_list ap)
 {
 	char	*nfmt;
Index: log.h
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/log.h,v
diff -u -p -r1.20 log.h
--- log.h	21 Oct 2020 06:48:33 -0000	1.20
+++ log.h	29 Apr 2026 13:49:18 -0000
@@ -36,8 +36,6 @@ void	log_debug(const char *, ...)
 	    __attribute__((__format__ (printf, 1, 2)));
 void	logit(int, const char *, ...)
 	    __attribute__((__format__ (printf, 2, 3)));
-void	vlog(int, const char *, va_list)
-	    __attribute__((__format__ (printf, 2, 0)));
 __dead void fatal(const char *, ...)
 	    __attribute__((__format__ (printf, 1, 2)));
 __dead void fatalx(const char *, ...)