neater gnulib backport

diff --git a/m4/stdio_h.m4 b/m4/stdio_h.m4
index 8458bec9df6c3b2ea8d0586e246d25e04e0205f9..d3edb426633d1fecbfd99266d77f4e7f03bbd522 100644 (file)
--- a/m4/stdio_h.m4
+++ b/m4/stdio_h.m4
@@ -35,7 +35,7 @@ AC_DEFUN([gl_STDIO_H],
 
   dnl Check for declarations of anything we want to poison if the
   dnl corresponding gnulib module is not in use, and which is not
-  dnl guaranteed by C89.
+  dnl guaranteed by both C89 and C11.
   gl_WARN_ON_USE_PREPARE([[#include <stdio.h>
     ]], [dprintf fpurge fseeko ftello getdelim getline gets popen renameat
     snprintf tmpfile vdprintf vsnprintf])