--- Makefile.orig	2010-06-21 11:35:08.000000000 +0200
+++ Makefile	2010-06-21 19:10:33.000000000 +0200
@@ -23,8 +23,8 @@
 ### compiler
 
 ### gcc
-CC=gcc
-CFLAGS= -O -Werror -Wall -Wcast-qual -Wstrict-prototypes \
+CC?=cc
+CFLAGS+= -O -Werror -Wall -Wcast-qual -Wstrict-prototypes \
 	-Wmissing-prototypes -Wmissing-declarations -Winline -Wcast-align 
 ### cc
 #CC=cc
@@ -57,7 +57,7 @@
 ### installdir    
 ###   will use $INSTDIR/bin  and  $INSTDIR/man/man1, 
 ###   both dirs have to exist for installation
-INSTDIR=/usr/local
+INSTDIR=${PREFIX}
 
 ### ------------------------------------------------------------------------
 ### --- end of user settings -----------------------------------------------