README for XFree86 3.3.2 on OS/2 : Hardware and Software Requirements : Required Software
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## 4.2. Required Software

- Any version of Warp 3 with at least fixpack 17, or Warp 4 is required
- XFree86/OS2-3.3.2 may use a local named-pipe connection or a TCP/IP based network connection.
  1. Warp comes with the Internet Access Kit (IAK), which is sufficient. Warp Connect and Warp Server come with a full version of TCP/IP (3.0). Use of this software is preferred over IAK then.
  2. Warp 4 comes with TCP/IP 4.0 which should also work.
  3. There are reports that with EMX 0.9 fix 4, you can also use the new 32 bit IBM TCP/IP 4.1 product.
  4. The old IBM TCP/IP 2.0, that comes with the IBM PMX product may be used with Warp as well, although it is no longer supported by IBM. Please ensure that you have the latest CSDs installed.
  Other versions of TCP/IP, such as FTP's, DEC's, or Hummingbird's TCP/IP versions, as well as IBM TCP/IP 1.X are not supported. Nor does any networking support from DOS (packet drivers, winsock), Netware, or NetBIOS work, and I won't to provide support for that in the future.
- If you want to write or port applications for XFree86, you are encouraged to do so. You will need a complete installation of EMX/gcc 0.9C fix4 or later for doing so. Neither the second (obsolete) implementation of gcc, nor any commercial package, including Cset/2, VAC++, Borland C++/OS2, Watcom C++, Metaware C, and others, is suitable for porting, because various parts of the X DLLs rely on certain features only present with EMX.

README for XFree86 3.3.2 on OS/2 : Hardware and Software Requirements : Required Software
Previous: Supported, Required, and Recommended Hardware
Next: Installing the System