diff -Naruw a/raster/rt_core/Makefile.in b/raster/rt_core/Makefile.in
--- a/raster/rt_core/Makefile.in	2012-03-21 21:36:59.000000000 +0000
+++ b/raster/rt_core/Makefile.in	2013-04-28 13:23:21.055728249 +0000
@@ -8,7 +8,7 @@
 #
 #############################################################################
 
-AR=ar rs
+ARFLAGS=rs
 
 CC=@CC@
 LIBLWGEOM_LDFLAGS=../../liblwgeom/.libs/liblwgeom.a
@@ -35,4 +35,4 @@
 	rm -f Makefile
 
 librtcore.a: $(RT_OBJS) $(RT_HEADERS)
-	$(AR) $(RT_LIB) $(RT_OBJS)
+	$(AR) $(ARFLAGS) $(RT_LIB) $(RT_OBJS)