--- OLD/progress.h	Thu Jan  1 00:00:00 1970
+++ NEW/progress.h	Thu Jan  1 00:00:00 1970
@@ -3,6 +3,8 @@
 
 struct progress;
 
+extern void progress_line(int, const char *, ...)
+	__attribute__((__format__(__printf__,2,3)));
 void display_throughput(struct progress *progress, off_t total);
 int display_progress(struct progress *progress, unsigned n);
 struct progress *start_progress(const char *title, unsigned total);