Do extend CFLAGS instead forcing it to just -Wall at least that way make DEBUG=-g works again.
-- :wq Claudio Index: Makefile =================================================================== RCS file: /cvs/src/usr.bin/netstat/Makefile,v retrieving revision 1.22 diff -u -p -r1.22 Makefile --- Makefile 6 Feb 2015 03:22:00 -0000 1.22 +++ Makefile 8 Feb 2015 01:46:08 -0000 @@ -7,6 +7,6 @@ BINGRP= kmem BINMODE=2555 LDADD= -lkvm -lutil DPADD= ${LIBKVM} ${LIBUTIL} -CFLAGS= -Wall +CFLAGS+= -Wall .include <bsd.prog.mk>