+
+ 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.
+ gl_WARN_ON_USE_PREPARE([[#include <stdio.h>
+ ]], [dprintf fpurge fseeko ftello getdelim getline popen renameat
+ snprintf tmpfile vdprintf vsnprintf])