diff -Nru mISDNuser-1_1_9.orig/i4lnet/Makefile mISDNuser-1_1_9/i4lnet/Makefile
--- mISDNuser-1_1_9.orig/i4lnet/Makefile	2008-11-18 12:35:09.000000000 +0100
+++ mISDNuser-1_1_9/i4lnet/Makefile	2009-08-28 14:30:18.835179949 +0200
@@ -2,12 +2,18 @@
 AR = ar
 RANLIB = ranlib
 
-all: libisdnnet.a libisdnnet_pic.a libisdnnet.so
+SOMAJOR=0
+SOMINOR=0.0
+SOVERSION=$(SOMAJOR).$(SOMINOR)
+
+all: libisdnnet.a libisdnnet_pic.a libisdnnet.so.$(SOVERSION)
 
 install:
 	install -m 644 libisdnnet.a $(INSTALL_PREFIX)/usr/lib
 	install -m 644 libisdnnet_pic.a $(INSTALL_PREFIX)/usr/lib
-	install -m 644 libisdnnet.so $(INSTALL_PREFIX)/usr/lib
+	install -m 755 libisdnnet.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib/
+	ln -sf libisdnnet.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib/libisdnnet.so.$(SOMAJOR)
+	ln -sf libisdnnet.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib/libisdnnet.so
 	cp *.h $(INSTALL_PREFIX)/usr/include/mISDNuser/
 
 ISDNNET_OBJ = net_if.o isdn_debug.o isdn_msg.o fsm.o net_l2.o tei.o net_l3.o \
@@ -27,8 +33,8 @@
 	$(AR) cru $@ $^
 	$(RANLIB) $@
 
-libisdnnet.so: $(ISDNNET_OBJ)
-	$(CC) $(CFLAGS) -shared -Xlinker -x -o $@ $^
+libisdnnet.so.$(SOVERSION): $(ISDNNET_OBJ)
+	$(CC) $(CFLAGS) -shared -Xlinker -x -Wl,-soname,libisdnnet.so.$(SOVERSION) -o $@ $^
 
 .c.o:
 	$(CC) $(CFLAGS) -o $@ -c $<
diff -Nru mISDNuser-1_1_9.orig/lib/Makefile mISDNuser-1_1_9/lib/Makefile
--- mISDNuser-1_1_9.orig/lib/Makefile	2008-11-18 12:35:09.000000000 +0100
+++ mISDNuser-1_1_9/lib/Makefile	2009-08-28 14:29:56.945929917 +0200
@@ -2,10 +2,16 @@
 AR = ar
 RANLIB = ranlib
 
-all: libmISDN.a libmISDN_pic.a libmISDN.so
+SOMAJOR=0
+SOMINOR=0.0
+SOVERSION=$(SOMAJOR).$(SOMINOR)
+
+all: libmISDN.a libmISDN_pic.a libmISDN.so.$(SOVERSION)
 
 install:
-	install -m 644 libmISDN.so $(INSTALL_PREFIX)/usr/lib
+	install -m 755 libmISDN.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib
+	ln -s libmISDN.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib/libmISDN.so.$(SOMAJOR)
+	ln -s libmISDN.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib/libmISDN.so
 	install -m 644 libmISDN_pic.a $(INSTALL_PREFIX)/usr/lib
 	install -m 644 libmISDN.a $(INSTALL_PREFIX)/usr/lib
 
@@ -24,8 +30,8 @@
 	$(AR) cru $@ $^
 	$(RANLIB) $@
 
-libmISDN.so: $(LIBMISDN_OBJS)
-	$(CC) $(CFLAGS) -shared -Xlinker -x -o $@ $^
+libmISDN.so.$(SOVERSION): $(LIBMISDN_OBJS)
+	$(CC) $(CFLAGS) -shared -Xlinker -x -Wl,-soname,libmISDN.so.$(SOMAJOR) -o $@ $^
 
 .c.o:
 	$(CC) $(CFLAGS) -o $@ -c $<
diff -Nru mISDNuser-1_1_9.orig/suppserv/Makefile mISDNuser-1_1_9/suppserv/Makefile
--- mISDNuser-1_1_9.orig/suppserv/Makefile	2008-11-18 12:35:09.000000000 +0100
+++ mISDNuser-1_1_9/suppserv/Makefile	2009-08-28 14:31:52.616180077 +0200
@@ -2,19 +2,25 @@
 AR = ar
 RANLIB = ranlib
 
+SOMAJOR=0
+SOMINOR=0.0
+SOVERSION=$(SOMAJOR).$(SOMINOR)
+
 #CFLAGS += -DASN1_DEBUG
 
 SUPPSERV_OBJ = asn1.o asn1_enc.o asn1_generic.o asn1_aoc.o asn1_basic_service.o asn1_comp.o asn1_diversion.o asn1_address.o fac.o
 SUPPSERV_PICOBJ = $(SUPPSERV_OBJ:%.o=%.lo)
 
-all: libsuppserv.a libsuppserv_pic.a libsuppserv.so
+all: libsuppserv.a libsuppserv_pic.a libsuppserv.so.$(SOVERSION)
 
 main: $(SUPPSERVOBJ)
 
 install:
 	install -m 644 libsuppserv.a $(INSTALL_PREFIX)/usr/lib
 	install -m 644 libsuppserv_pic.a $(INSTALL_PREFIX)/usr/lib
-	install -m 644 libsuppserv.so $(INSTALL_PREFIX)/usr/lib
+	install -m 755 libsuppserv.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib
+	ln -s libsuppserv.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib/libsuppserv.so.$(SOMAJOR)
+	ln -s libsuppserv.so.$(SOVERSION) $(INSTALL_PREFIX)/usr/lib/libsuppserv.so
 	cp *.h $(INSTALL_PREFIX)/usr/include/mISDNuser/
 
 libsuppserv_pic.a: $(SUPPSERV_PICOBJ)
@@ -25,8 +31,8 @@
 	$(AR) cru $@ $<
 	$(RANLIB) $@
 
-libsuppserv.so: $(SUPPSERV_OBJ)
-	$(CC) -shared -Xlinker -x -o $@ $^
+libsuppserv.so.$(SOVERSION): $(SUPPSERV_OBJ)
+	$(CC) -shared -Xlinker -x -Wl,-soname,libsuppserv.so.$(SONAME) -o $@ $^
 
 
 .c.o: