[B.A.T.M.A.N.] [PATCH] batctl: suppress implicit-fallthrough compiler warning

[Philipp Psurek <philipp.psurek@gmail.com>]

GCC 7.1.0 complains about an intended fallthrough.
“__attribute__ ((fallthrough))” in this part of code would suppress this
warning. Because older GCC compiler don’t understand this statement attribute
and because there is already a comment in the source containing
“falls?[ \t-]*thr(ough|u)” we can suppress the warning with the
“-Wimplicit-fallthrough=2” warning option. Unintended fallthroughs without a
comment would trigger this warning again.

To avoid compiler recognition in the Makefile a simply change of the comment
is sufficient to suppress the warning. For some reason only stand alone
comments mentioned in [1] are recognized so the comment has to be split up into
two parts.

[1] https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gcc/Warning-Options.html#index-Wimplicit-fallthrough_003d

Signed-off-by: Philipp Psurek <philipp.psurek@gmail.com>
---
 tp_meter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tp_meter.c b/tp_meter.c
index 918fb79..bd7fdb4 100644
--- a/tp_meter.c
+++ b/tp_meter.c
@@ -500,7 +500,7 @@ int tp_meter(char *mesh_iface, int argc, char **argv)
 		break;
 	case BATADV_TP_REASON_CANCEL:
 		printf("CANCEL received: test aborted\n");
-		/* fall through and print the partial result */
+		/* fallthrough *//* and print the partial result */
 	case BATADV_TP_REASON_COMPLETE:
 		if (result.test_time > 0) {
 			throughput = result.total_bytes * 1000;
-- 
2.13.0