Use warn() for warnings

src/emu/nanos6/event.c

@@ -415,7 +415,7 @@ pre_task(struct emu *emu)
 	int ret = 0;
 	switch (emu->ev->v) {
 		case 'C':
-			err("warning: got old 6TC event, ignoring");
+			warn("got old 6TC event, ignoring");
 			break;
 		case 'c':
 			ret = create_task(emu);

src/emu/ovnisort.c

@@ -302,7 +302,7 @@ stream_winsort(struct stream *stream, struct ring *r)
 	}
 
 	if (empty_regions > 0)
-		err("warning: stream %s contains %ld empty sort regions\n",
+		warn("stream %s contains %ld empty sort regions\n",
 				stream->relpath, empty_regions);
 
 	if (updated && fdatasync(fd) < 0)

src/emu/stream.c

@@ -114,7 +114,7 @@ stream_load(struct stream *stream, const char *tracedir, const char *relpath)
 	if (stream->offset < stream->size) {
 		stream->active = 1;
 	} else if (stream->offset == stream->size) {
-		err("warning: stream '%s' has zero events", stream->relpath);
+		warn("stream '%s' has zero events", stream->relpath);
 		stream->active = 0;
 	} else {
 		err("impossible, offset %ld bigger than size %ld",

src/emu/system.c

@@ -151,7 +151,7 @@ create_system(struct system *sys, struct trace *trace)
 	size_t i = 0;
 	for (struct stream *s = trace->streams; s ; s = s->next) {
 		if (!loom_matches(s->relpath)) {
-			err("warning: ignoring unknown stream %s", s->relpath);
+			warn("ignoring unknown stream %s", s->relpath);
 			continue;
 		}
 
@@ -404,7 +404,7 @@ init_offsets(struct system *sys, struct trace *trace)
 	/* If we have more than one hostname and no offset table has been found,
 	 * we won't be able to synchronize the clocks */
 	if (n == 0 && sys->nlooms > 1) {
-		err("warning: no clock offset file loaded with %ld looms",
+		warn("no clock offset file loaded with %ld looms",
 				sys->nlooms);
 	}