diff -Naupr mdsplib-0.11.orig/Makefile mdsplib-0.11/Makefile
--- mdsplib-0.11.orig/Makefile	2003-12-10 20:56:23.000000000 +0100
+++ mdsplib-0.11/Makefile	2007-03-01 14:55:05.000000000 +0100
@@ -1,6 +1,9 @@
 CC = gcc
-CFLAGS = -O3
 LIBS = 
+DESTDIR = 
+prefix = /usr
+libdir = $(prefix)/lib
+includedir = $(prefix)/include
 
 library: libmetar.a
 
@@ -44,9 +47,11 @@ clean:
 	rm -f src/*.o dmetar libmetar.a
 
 install: library
-	cp metar.h /usr/local/include/
-	chmod 0644 /usr/local/include/metar.h
-	cp libmetar.a /usr/local/lib/
-	chmod 0644 /usr/local/lib/libmetar.a
-	ranlib /usr/local/lib/libmetar.a
+	mkdir -p $(DESTDIR)$(includedir)
+	cp metar.h $(DESTDIR)$(includedir)/
+	chmod 0644 $(DESTDIR)$(includedir)/metar.h
+	mkdir -p $(DESTDIR)$(libdir)
+	cp libmetar.a $(DESTDIR)$(libdir)/
+	chmod 0644 $(DESTDIR)$(libdir)/libmetar.a
+	ranlib $(DESTDIR)$(libdir)/libmetar.a