Import new warning flag handling from rra-c-util

Use Autoconf to probe for warning flags, update rra-c-util files
with various warning fixes, and fix newly-discovered warnings in
the remctl source base caught by GCC 6.

2 files changed, 2 insertions, 2 deletions

diff --git a/tests/server/ssh-parse-t.c b/tests/server/ssh-parse-t.c
index 1be56b9..28c7a23 100644
--- a/tests/server/ssh-parse-t.c
+++ b/tests/server/ssh-parse-t.c
@@ -19,7 +19,7 @@
 /*
  * Check a struct iovec against a string.
  */
-static bool
+static bool __attribute__((__format__(printf, 3, 4)))
 is_iovec_string(const char *wanted, const struct iovec *seen,
                 const char *format, ...)
 {
diff --git a/tests/util/network/server-t.c b/tests/util/network/server-t.c
index 9aaf208..c82d725 100644
--- a/tests/util/network/server-t.c
+++ b/tests/util/network/server-t.c
@@ -404,7 +404,7 @@ test_all(const char *source_ipv4, const char *source_ipv6 UNUSED)
         fd = fds[i];
         if (listen(fd, 1) < 0)
             sysbail("cannot listen to socket %d", fd);
-        ok(fd != INVALID_SOCKET, "all address server test (part %d)", i + 1);
+        ok(fd != INVALID_SOCKET, "all address server test (part %u)", i + 1);
 
         /* Get the socket type to determine what type of client to run. */
         saddr = get_sockaddr(fd);