/dev/ptmx doesn't exist on AIX, they had to be different and use /dev/ptc.
Otherwise, the 2 devices seem to work the same for allocating a pseudo-tty.
diff --git a/configure b/configure
index 9e9224a..0d9e495 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
#! /bin/sh
-# From configure.in Revision: 1.393 .
+# From configure.in Revision: 1.394 .
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.53 for python 2.3.
#
@@ -16821,6 +16821,23 @@
echo "${ECHO_T}no" >&6
fi
+echo "$as_me:$LINENO: checking for /dev/ptc" >&5
+echo $ECHO_N "checking for /dev/ptc... $ECHO_C" >&6
+
+if test -e /dev/ptc
+then
+ echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_DEV_PTC 1
+_ACEOF
+
+else
+ echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
echo "$as_me:$LINENO: checking for socklen_t" >&5
echo $ECHO_N "checking for socklen_t... $ECHO_C" >&6
if test "${ac_cv_type_socklen_t+set}" = set; then