From: Philipp Psurek Date: Tue, 13 Jun 2017 13:08:24 +0200 Subject: batctl: suppress implicit-fallthrough compiler warning 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 [sw: Put the second comment part into a new line to avoid clutter] Signed-off-by: Simon Wunderlich Origin: upstream, https://git.open-mesh.org/batctl.git/commit/50ee3c45feeda6d8c04ee127097badf99f78a26e diff --git a/tp_meter.c b/tp_meter.c index f95b8391ff3426200697034f1087274ca9e5a9dd..ec0dc4802c638471ff3c38bd344e31c208b634a5 100644 --- a/tp_meter.c +++ b/tp_meter.c @@ -498,8 +498,9 @@ 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 */ + /* fall through */ case BATADV_TP_REASON_COMPLETE: + /* print the partial result */ if (result.test_time > 0) { throughput = result.total_bytes * 1000; throughput /= result.test_time;