--- ./src/Makefile.in.orig	2014-05-19 15:26:42.836106845 +0800
+++ ./src/Makefile.in	2014-05-19 15:27:25.010111107 +0800
@@ -98,9 +98,9 @@
 	for i in @build_supports@; do cd supports/$$i; $(MAKE) distclean; done
 
 install: all
-	if [ ! -d $(libdir) ]; then $(INSTALL) -d $(libdir); fi
-	if [ ! -d $(includedir) ]; then $(INSTALL) -d $(includedir); fi
-	$(LIBTOOL) --mode=install $(INSTALL_DATA) $(LIBNAME) $(libdir)
-	$(INSTALL_DATA) $(INCLUDES) $(includedir)
+	if [ ! -d $(DESTDIR)$(libdir) ]; then $(INSTALL) -d $(DESTDIR)$(libdir); fi
+	if [ ! -d $(DESTDIR)$(includedir) ]; then $(INSTALL) -d $(DESTDIR)$(includedir); fi
+	$(LIBTOOL) --mode=install $(INSTALL_DATA) $(LIBNAME) $(DESTDIR)$(libdir)
+	$(INSTALL_DATA) $(INCLUDES) $(DESTDIR)$(includedir)
 	for i in @build_supports@; do cd supports/$$i; $(MAKE) install; done