--- Makefile.orig	2012-01-06 14:29:04.000000000 +0100
+++ Makefile	2013-09-05 14:35:52.000000000 +0200
@@ -177,6 +177,11 @@ $(OBJDIR)/%.o: $(SRCDIR)/%.cc
 	$(CCC)  $(CCFLAGS) $(ADDFLAGS) -c $< -o $@
 	$(STRIP) $@
 
+# the shared object files
+$(OBJDIR)/%.So: $(SRCDIR)/%.cc
+	$(CCC) -fPIC $(CCFLAGS) $(ADDFLAGS) -c $< -o $@
+	$(STRIP) $@
+
 
 #######################################################################
 #
@@ -523,15 +524,20 @@
 	$(ARCHIVE) $@ $(OSI_O)
 
 # The basic ABACUS library
-abacus-base:	$(LIBDIR)/stuff/abacus-base.a
+abacus-base-static:	$(LIBDIR)/stuff/abacus-base.a
+abacus-base-shared:	$(LIBDIR)/stuff/abacus-base.so.1
 
 $(LIBDIR)/stuff/abacus-base.a: $(ABACUS_O)
 	rm -f $@
 	@$(PRE_ARCHIVE) $(ABACUS_O)
 	$(ARCHIVE) $@ $(ABACUS_O)
 
+$(LIBDIR)/stuff/abacus-base.so.1: $(ABACUS_O:%.o=%.So)
+	rm -f $@
+	$(CCC) $(LDFLAGS) -shared -o $@ $(ABACUS_O:%.o=%.So)
+
 # Build the library distribution directory (lib and lib/stuff)
-lib-all: subdirs abacus-base lpif interface $(ADDITIONAL_LIB_ALL)
+lib-all: subdirs abacus-base-static abacus-base-shared lpif interface $(ADDITIONAL_LIB_ALL)
 
 # Create a tar file containing all necessary stuff to compile ABACUS on
 # a remote system.
@@ -571,6 +577,7 @@
 
 abacus: lib-all
 	cp $(LIBDIR)/stuff/abacus-base.a $(LIBDIR)/libabacus-osi.a
+	cp $(LIBDIR)/stuff/abacus-base.so.1 $(LIBDIR)/libabacus-osi.so.1
 	mkdir $(LIBDIR)/temp
 	cd $(LIBDIR)/temp; ar x ../stuff/interface-osi.a 
 	find $(LIBDIR)/temp -name \*.o | xargs -n1 ar r $(LIBDIR)/libabacus-osi.a