testsuite: fix build failure
After commit
6c09257f1bf6 ("rtnetlink: add new function
rtnl_echo_talk()") "make check" results in:
$ make check
make -C testsuite
make -C iproute2 configure
make -C testsuite alltests
make -C tools
CC generate_nlmsg
/usr/bin/ld: /tmp/cc6YaGBM.o: in function `rtnl_echo_talk':
libnetlink.c:(.text+0x25bd): undefined reference to `new_json_obj'
/usr/bin/ld: libnetlink.c:(.text+0x25c7): undefined reference to `open_json_object'
/usr/bin/ld: libnetlink.c:(.text+0x25e3): undefined reference to `close_json_object'
/usr/bin/ld: libnetlink.c:(.text+0x25e8): undefined reference to `delete_json_obj'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:6: generate_nlmsg] Error 1
make[1]: *** [Makefile:40: generate_nlmsg] Error 2
make: *** [Makefile:130: check] Error 2
This is due to json function calls included in libutil and not in
libnetlink. Fix this adding libutil.a to the tools Makefile, and linking
against libcap as required by libutil itself.
Fixes: 6c09257f1bf6 ("rtnetlink: add new function rtnl_echo_talk()")
Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
Acked-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>