$OpenBSD: patch-Makefile_in,v 1.1 2008/01/29 07:49:57 jakob Exp $
--- Makefile.in.orig	Mon Jan 28 10:04:29 2008
+++ Makefile.in	Mon Jan 28 10:04:12 2008
@@ -79,7 +79,8 @@ bin_PROGRAMS = scanssh
 scanssh_SOURCES = scanssh.c atomicio.c exclude.c connecter.c xmalloc.c 	interface.c socks.c http.c telnet.c exclude.h interface.h 	scanssh.h socks.h xmalloc.h
 
 scanssh_LDADD = @LIBOBJS@ @PCAPLIB@ @EVENTLIB@ @DNETLIB@
-CFLAGS = -O2 -Wall -g
+CFLAGS ?= -O2 -g
+CFLAGS += -Wall
 
 INCLUDES = -I$(top_srcdir)/@DNETCOMPAT@ -I$(top_srcdir)/compat 	@EVENTINC@ @PCAPINC@ @DNETINC@