There is no /dev/ptc on Linux because it is AIX specific.
@ -57,4 +57,6 @@ if atstage cross; then
var_append configcache ' ' "ac_cv_buggy_getaddrinfo=no"
# on a running system we have /dev/ptmx
var_append configcache ' ' "ac_cv_file__dev_ptmx=yes"
# no /dev/ptc because it is AIX specific
var_append configcache ' ' "ac_cv_file__dev_ptc=no"
fi