Index: Makefile
diff -u Makefile.orig Makefile
--- Makefile.orig	Fri Aug  2 11:56:08 2002
+++ Makefile	Fri Aug 30 01:12:10 2002
@@ -74,13 +74,13 @@
 #GTOP_LIBS_D = -L$(GTOP_PREFIX)/lib -lgtop -lgtop_common -lgtop_sysdeps
 #export GTOP_INCLUDE GTOP_LIBS GTOP_LIBS_D
 
-INSTALLDIR = /usr/local/bin
-SINSTALLDIR = $(INSTALLDIR)
-MANDIR = /usr/local/share/man/man1
-SMANDIR = $(MANDIR)
+INSTALLDIR ?= /usr/local/bin
+SINSTALLDIR ?= $(INSTALLDIR)
+MANDIR ?= /usr/local/share/man/man1
+SMANDIR ?= $(MANDIR)
 MANMODE = 644
 MANDIRMODE = 755
-INCLUDEDIR = /usr/local/include
+INCLUDEDIR ?= /usr/local/include
 INCLUDEMODE = 644
 INCLUDEDIRMODE = 755