Index: configure.ac
===================================================================
--- configure.ac	(revision 191576)
+++ configure.ac	(working copy)
@@ -11,7 +11,7 @@ AC_INIT(package-unused, version-unused,,
 AC_CONFIG_SRCDIR(Makefile.am)
 AC_CONFIG_HEADER(config.h)
 
-libtool_VERSION=1:0:0
+libtool_VERSION=2:1:0
 AC_SUBST(libtool_VERSION)
 
 AM_ENABLE_MULTILIB(, ..)
Index: Makefile.am
===================================================================
--- Makefile.am	(revision 192024)
+++ Makefile.am	(working copy)
@@ -1753,7 +1753,8 @@ libgo_go_objs = \
 
 libgo_la_SOURCES = $(runtime_files)
 
-libgo_la_LDFLAGS = $(PTHREAD_CFLAGS) $(AM_LDFLAGS)
+libgo_la_LDFLAGS = \
+	-version-info $(libtool_VERSION) $(PTHREAD_CFLAGS) $(AM_LDFLAGS)
 
 libgo_la_LIBADD = \
 	$(libgo_go_objs) $(LIBFFI) $(PTHREAD_LIBS) $(MATH_LIBS) $(NET_LIBS)