build: add individual linker version scripts for shared libraries

Instead of using a shared version script 'libnl.sym', add individual
linker scripts for all libnl libraries.

For now, the content of the version script is unchanged and this
patch does not have any externally visible changes.

Signed-off-by: Thomas Haller <thaller@redhat.com>

.gitignore

@@ -24,4 +24,3 @@ cscope.*
 /configure
 /libtool
 /*.pc
-/libnl.sym

Makefile.am

@@ -21,4 +21,10 @@ pkgsysconfdir = ${sysconfdir}/libnl
 pkgsysconf_DATA = etc/pktloc etc/classid
 
 EXTRA_DIST = \
-	$(pkgsysconf_DATA)
+	$(pkgsysconf_DATA) \
+	libnl-3.sym \
+	libnl-genl-3.sym \
+	libnl-idiag-3.sym \
+	libnl-nf-3.sym \
+	libnl-route-3.sym \
+	libnl-xfrm-3.sym

configure.ac

@@ -121,7 +121,6 @@ AC_CONFIG_SUBDIRS([doc])
 
 AC_CONFIG_FILES([
 Makefile
-libnl.sym
 libnl-3.0.pc
 libnl-route-3.0.pc
 libnl-genl-3.0.pc

lib/Makefile.am

@@ -11,27 +11,46 @@ AM_CPPFLAGS  =			 	\
 	-DSYSCONFDIR=\"$(sysconfdir)/libnl\"
 
 AM_LDFLAGS = \
-	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE) \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)
-	-Wl,--version-script=$(top_builddir)/libnl.sym
 
 lib_LTLIBRARIES = \
 	libnl-3.la libnl-genl-3.la libnl-route-3.la libnl-nf-3.la libnl-idiag-3.la libnl-xfrm-3.la
 
+libnl_3_la_LDFLAGS = \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE) \
+	-Wl,--version-script=$(top_builddir)/libnl-3.sym
+libnl_3_la_DEPENDENCIES = \
+	$(top_builddir)/libnl-3.sym
 libnl_3_la_SOURCES = \
 	addr.c attr.c cache.c cache_mngr.c cache_mngt.c data.c \
 	error.c handlers.c msg.c nl.c object.c socket.c utils.c \
 	version.c hash.c hashtable.c
 
 libnl_idiag_3_la_LIBADD = libnl-3.la
+libnl_idiag_3_la_LDFLAGS = \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE) \
+	-Wl,--version-script=$(top_builddir)/libnl-idiag-3.sym
+libnl_idiag_3_la_DEPENDENCIES = \
+	$(top_builddir)/libnl-idiag-3.sym
 libnl_idiag_3_la_SOURCES = \
 	idiag/idiag_meminfo_obj.c idiag/idiag_vegasinfo_obj.c \
 	idiag/idiag_msg_obj.c idiag/idiag_req_obj.c idiag/idiag.c
 
 libnl_genl_3_la_LIBADD  = libnl-3.la
+libnl_genl_3_la_LDFLAGS = \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE) \
+	-Wl,--version-script=$(top_builddir)/libnl-genl-3.sym
+libnl_genl_3_la_DEPENDENCIES = \
+	$(top_builddir)/libnl-genl-3.sym
 libnl_genl_3_la_SOURCES = \
 	genl/ctrl.c genl/family.c genl/genl.c genl/mngt.c
 
 libnl_nf_3_la_LIBADD  = libnl-route-3.la
+libnl_nf_3_la_LDFLAGS = \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE) \
+	-Wl,--version-script=$(top_builddir)/libnl-nf-3.sym
+libnl_nf_3_la_DEPENDENCIES = \
+	$(top_builddir)/libnl-nf-3.sym
 libnl_nf_3_la_SOURCES = \
 	netfilter/ct.c netfilter/ct_obj.c netfilter/log.c \
 	netfilter/log_msg.c netfilter/log_msg_obj.c netfilter/log_obj.c \
@@ -60,6 +79,11 @@ route/cls/ematch_syntax.c: route/cls/ematch_syntax.y
 	$(AM_V_GEN) $(MKDIR_P) route/cls; $(YACC) -d $(YFLAGS) -o $@ $^
 
 libnl_route_3_la_LIBADD  = libnl-3.la
+libnl_route_3_la_LDFLAGS = \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE) \
+	-Wl,--version-script=$(top_builddir)/libnl-route-3.sym
+libnl_route_3_la_DEPENDENCIES = \
+	$(top_builddir)/libnl-route-3.sym
 libnl_route_3_la_SOURCES = \
 	route/addr.c route/class.c route/cls.c route/act.c route/link.c \
 	route/neigh.c route/neightbl.c route/nexthop.c route/qdisc.c \
@@ -112,6 +136,11 @@ EXTRA_DIST = \
 	route/cls/ematch_syntax.y
 
 libnl_xfrm_3_la_LIBADD  = libnl-3.la
+libnl_xfrm_3_la_LDFLAGS = \
+	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE) \
+	-Wl,--version-script=$(top_builddir)/libnl-xfrm-3.sym
+libnl_xfrm_3_la_DEPENDENCIES = \
+	$(top_builddir)/libnl-xfrm-3.sym
 libnl_xfrm_3_la_SOURCES = \
 	xfrm/ae.c \
 	xfrm/lifetime.c \

libnl-3.sym

@@ -1,4 +1,4 @@
-libnl_@MAJ_VERSION@ {
+libnl_3 {
 global:
 	*;
 local:

libnl-genl-3.sym

@@ -0,0 +1,4 @@
+libnl_3 {
+global:
+	*;
+};

libnl-idiag-3.sym

@@ -0,0 +1,4 @@
+libnl_3 {
+global:
+	*;
+};

libnl-nf-3.sym

@@ -0,0 +1,4 @@
+libnl_3 {
+global:
+	*;
+};

libnl-route-3.sym

@@ -0,0 +1,4 @@
+libnl_3 {
+global:
+	*;
+};

libnl-xfrm-3.sym

@@ -0,0 +1,4 @@
+libnl_3 {
+global:
+	*;
+};