-MOSTLYCLEANFILES = *.o *.ko *.mod.c pingsrv.c pingcli.c spingsrv.c spingcli.c
-DIST_SOURCES = $(pingsrc-objs:%.o=%.c) $(pingcli:%.o=%.c) \
- $(spingsrv:%.o=%.c) $(spingcli:%.o=%.c) ping.h
+MOSTLYCLEANFILES := @MOSTLYCLEANFILES@ pingsrv.c pingcli.c spingsrv.c spingcli.c
+DIST_SOURCES = ping_srv.c ping_cli.c sping_srv.c sping_cli.c ping.h