A couple of compiler warnings

[stv0g]

#19 313.9 /tmp/tmp.OCigIi/nanomsg/src/transports/inproc/sinproc.c: In function 'nn_sinproc_shutdown_events':
#19 313.9 /tmp/tmp.OCigIi/nanomsg/src/transports/inproc/sinproc.c:224:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
#19 313.9   224 |         switch (type) {
#19 313.9       |         ^~~~~~
#19 313.9 /tmp/tmp.OCigIi/nanomsg/src/transports/inproc/sinproc.c:242:5: note: here
#19 313.9   242 |     case NN_SINPROC_SRC_PEER:
#19 313.9       |     ^~~~

#19 322.6 /tmp/tmp.OCigIi/nanomsg/tests/../src/utils/stopwatch.c: In function 'nn_stopwatch_init':
#19 322.6 /tmp/tmp.OCigIi/nanomsg/tests/../src/utils/stopwatch.c:55:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 322.6    55 |     int rc;
#19 322.6       |         ^~

#19 322.6 /tmp/tmp.OCigIi/nanomsg/tests/../src/utils/stopwatch.c: In function 'nn_stopwatch_term':
#19 322.6 /tmp/tmp.OCigIi/nanomsg/tests/../src/utils/stopwatch.c:65:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 322.6    65 |     int rc;
#19 322.6       |         ^~

#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_init':
#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:55:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.2    55 |     int rc;
#19 328.2       |         ^~

#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_term':
#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:65:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.2    65 |     int rc;
#19 328.2       |         ^~

#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/inproc_lat.c: In function 'worker':
#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/inproc_lat.c:44:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.2    44 |     int rc;
#19 328.2       |         ^~

#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/inproc_lat.c: In function 'main':
#19 328.2 /tmp/tmp.OCigIi/nanomsg/perf/inproc_lat.c:66:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.2    66 |     int rc;
#19 328.2       |         ^~

#19 328.4 In file included from /tmp/tmp.OCigIi/nanomsg/perf/remote_lat.c:32:
#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_init':
#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:55:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.4    55 |     int rc;
#19 328.4       |         ^~

#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_term':
#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:65:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.4    65 |     int rc;
#19 328.4       |         ^~

#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_init':
#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:55:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.4    55 |     int rc;
#19 328.4       |         ^~

#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_term':
#19 328.4 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:65:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.4    65 |     int rc;
#19 328.4       |         ^~

#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_init':
#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:55:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.5    55 |     int rc;
#19 328.5       |         ^~

#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c: In function 'nn_stopwatch_term':
#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/../src/utils/stopwatch.c:65:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.5    65 |     int rc;
#19 328.5       |         ^~

#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/inproc_thr.c: In function 'worker':
#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/inproc_thr.c:43:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.5    43 |     int rc;
#19 328.5       |         ^~

#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/inproc_thr.c: In function 'main':
#19 328.5 /tmp/tmp.OCigIi/nanomsg/perf/inproc_thr.c:67:9: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
#19 328.5    67 |     int rc;
#19 328.5       |         ^~

[stv0g]

See also https://stackoverflow.com/questions/777261/avoiding-unused-variables-warnings-when-using-assert-in-a-release-build

[gdamore]

All true.
And all below the threshold of something that I'd really invest any cycles on at this point -- nanomsg is in "sustaining" mode only -- all new work is on NNG. (Of course if you find an actual critical bug in libnanomsg, that's different. But compiler warnings like this are merely an annoyance.)