+ if test $ac_cv_header_termios_h != yes; then
+ HAVE_TERMIOS_H=0
+ fi
+
+ 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 <termios.h>]],
+ [tcgetsid])