[CentOS] Legacy PTY Support ?

Fri Jul 6 17:43:19 UTC 2007
Robert Moskowitz <rgm at htt-consult.com>

I am looking at T38Modem.  A relatively new version is ready for someone 
to build an rpm for (Mar '07).

But the readme warns:

Q. I try to use T38modem, but after run "t38modem -p ttyx0" I get a message
   "Could not open /dev/ptyx0: No such file or directory".
A. Looks like you don't have legacy PTY devices compiled in your kernel.
   You need to re-compile the kernel with 'Legacy PTY Support'.

Is this an issue for Centos 4.4 and/or Centos 5?