$OpenBSD: patch-config_mk,v 1.9 2012/07/09 16:33:40 zinke Exp $
--- config.mk.orig	Mon Dec 19 16:02:46 2011
+++ config.mk	Sat Jul  7 22:28:18 2012
@@ -4,30 +4,30 @@ VERSION = 6.0
 # Customize below to fit your system
 
 # paths
-PREFIX = /usr/local
-MANPREFIX = ${PREFIX}/share/man
+PREFIX ?= /usr/local
+MANPREFIX = ${PREFIX}/man
 
-X11INC = /usr/X11R6/include
-X11LIB = /usr/X11R6/lib
+X11INC = ${X11BASE}/include
+X11LIB = ${X11BASE}/lib
 
 # Xinerama
 XINERAMALIBS = -L${X11LIB} -lXinerama
 XINERAMAFLAGS = -DXINERAMA
 
 # includes and libs
-INCS = -I. -I/usr/include -I${X11INC}
-LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 ${XINERAMALIBS}
+INCS = -I${X11INC}
+LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS}
 
 # flags
-CPPFLAGS = -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
+CPPFLAGS += -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
 #CFLAGS = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
-CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
+CFLAGS += -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
 #LDFLAGS = -g ${LIBS}
-LDFLAGS = -s ${LIBS}
+LDFLAGS += ${LIBS}
 
 # Solaris
 #CFLAGS = -fast ${INCS} -DVERSION=\"${VERSION}\"
 #LDFLAGS = ${LIBS}
 
 # compiler and linker
-CC = cc
+CC ?= cc