We can't guarantee which 64-bit type will be used in an RPC struct; while %lu worked on 64-bit Linux, that won't always be the type used on all 64-bit platforms; and certainly is not right for 32-bit: admin.c: In function 'adminDispatchClientGetInfo': admin.c:265:25: error: format '%lu' expects argument of type 'long unsigned int', but argument 7 has type 'uint64_t {aka long long unsigned int}' [-Werror=format=] Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; --- Pushing under the build-breaker rule daemon/admin.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/daemon/admin.c b/daemon/admin.c index 3de09ca..dbf49dd 100644 --- a/daemon/admin.c +++ b/daemon/admin.c @@ -262,8 +262,8 @@ adminDispatchClientGetInfo(virNetServerPtr server ATTRIBUTE_UNUSED, if (!(clnt = virNetServerGetClient(srv, args->clnt.id))) { virReportError(VIR_ERR_NO_CLIENT, - _("no client with matching id '%lu' found"), - args->clnt.id); + _("no client with matching id '%llu' found"), + (unsigned long long) args->clnt.id); goto cleanup; } -- 2.5.5