1 files changed, 8 insertions, 0 deletions
diff --git a/stdio-common/scanf4.c b/stdio-common/scanf4.c
index f9a9134745..9bb14bb16b 100644
--- a/stdio-common/scanf4.c
+++ b/stdio-common/scanf4.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <libc-internal.h>
 
 int
 main(int arc, char *argv[])
@@ -15,7 +16,14 @@ main(int arc, char *argv[])
   printf("Result of fscanf %%n = %d\n", res);
   printf("Scanned format = %d\n", val);
 
+  /* We're testing exactly the case the warning is for.  */
+  DIAG_PUSH_NEEDS_COMMENT;
+  DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat-zero-length");
+
   res = fscanf(fp, "");
+
+  DIAG_POP_NEEDS_COMMENT;
+
   printf("Result of fscanf \"\" = %d\n", res);
   if (res != 0)
     abort ();