1 files changed, 10 insertions, 0 deletions
diff --git a/stdio-common/tstdiomisc.c b/stdio-common/tstdiomisc.c
index 5548a71e52..9c7342d55f 100644
--- a/stdio-common/tstdiomisc.c
+++ b/stdio-common/tstdiomisc.c
@@ -94,6 +94,14 @@ F (void)
 
   qnanval = NAN;
 
+  /* The %f and %F arguments are in fact constants, but GCC is
+     prevented from seeing this (volatile is used) so it cannot tell
+     that the output is not truncated.  */
+  DIAG_PUSH_NEEDS_COMMENT;
+#if __GNUC_PREREQ (7, 0)
+  DIAG_IGNORE_NEEDS_COMMENT (7.0, "-Wformat-truncation");
+#endif
+
   snprintf (buf, sizeof buf, "%a %A %e %E %f %F %g %G",
 	    qnanval, qnanval, qnanval, qnanval,
 	    qnanval, qnanval, qnanval, qnanval);
@@ -260,6 +268,8 @@ F (void)
   printf ("expected L\"-inf -INF -inf -INF -inf -INF -inf -INF\", got L\"%S\"\n",
 	  wbuf);
 
+  DIAG_POP_NEEDS_COMMENT;
+
   return result;
 }