Patch #805678: Add .so symlink during make install. Backported to 2.3.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 82073fe..c87bf6e 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -613,6 +613,7 @@
 			$(INSTALL_SHARED) libpython$(VERSION)$(SO) $(DESTDIR)$(BINDIR); \
 		else \
 			$(INSTALL_SHARED) libpython$(VERSION)$(SO) $(DESTDIR)$(LIBDIR)/$(INSTSONAME); \
+			(cd $(DESTDIR)$(LIBDIR); $(LN) -sf $(INSTSONAME) libpython$(VERSION)$(SO)); \
 		fi; \
 	else	true; \
 	fi