--- psys/src/Makefile.orig	2011-10-21 07:23:19.000000000 +0900
+++ psys/src/Makefile	2011-11-26 22:40:45.000000000 +0900
@@ -30,8 +30,8 @@
 ## to be made for different systems. Its a good idea to look over each
 ## block and make necessary changes before doing a "make install"
 
-LIBDIR = ../../lib
-BINDIR = ../../bin
+LIBDIR = ${PREFIX}/share/chipmunk
+BINDIR = ${PREFIX}/bin
 
 
 LIB = ../libp2c.a
@@ -56,7 +56,7 @@
 ## For most versions of UNIX, one of the above directories
 ## will be the correct one to use on the line below:
 
-XINCLUDEDIR = . 
+XINCLUDEDIR = ${LOCALBASE}/include
 
 ##
 ##  (1) Choosing your compiler
@@ -105,7 +105,7 @@
 LIBSTUFF = texstuff.ps untilstuff.ps plot.font
 
 
-CC = $(CHIPMUNKCC)
+CC ?= $(CHIPMUNKCC)
 
 
 ##
@@ -178,7 +178,7 @@
 
 CHIPMUNKFLAGS = 
 
-CFLAGS = $(CHIPMUNKFLAGS) $(FONTS) -I$(LOCINC) -I$(XINCLUDEDIR) -DCHIPLIB=\"`$(CD) $(LIBDIR); pwd`\"
+CFLAGS += -DBSD -DF_OK $(FONTS) -I$(LOCINC) -I$(XINCLUDEDIR) -DCHIPLIB=\"$(LIBDIR)\"
 
 P2CFLAGS = -DLOCAL_INIT=_local_p2c_init
 
@@ -201,7 +201,7 @@
 ## to delete
 
 
-all: setup libp2c.a
+all: libp2c.a
 
 setup:
 	-if [ ! -d $(LIBDIR) ] ; then mkdir $(LIBDIR) ; fi