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If you upgrade your OPENGL to 1.1 the examples that come 
with eCS or OS/2 Warp toolkit won't run anymore, you have to recompile them.

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http://www.os2ezine.com/v2n10/games.htm

OpenGL 1.1 Goes Gold

    Look for OpenGL to be an important gaming technology on both the OS/2 and Windows platforms. OS/2 Warp version 4 shipped
    with OpenGL v1.0, but IBM has recently released v1.1. Do you need it? Not yet, but you will as soon as OpenGL software begins to
    take advantage of the added features in v1.1. Look for OpenGL accelerating video drivers for OS/2 in maybe the next 6 months or so,
    as IBM is due to release an OpenGL DDK (Device driver Development Kit) in the coming months. There will likely be a
    relationship between the release of the OpenGL drivers and the release of GRADD drivers from major video chip set Independent
    Hardware Vendors. 

    If you want to download OpenGL v1.1, you can find it on one of IBM's FTP servers. The files you want to get are oglgold.zip and
    glut.zip. Glut.zip is a replacement for the glut.dll in the oglgold.zip file. 

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http://www.os2ezine.com/v4n6/p-gameprog.htm

  Multiplatform Game Programming in OS/2
      - by Robert Basler

  Summary: Start writing games in OS/2 that are easy to port to multiple operating systems. In this introduction, Robert discusses some
  of the technologies available for OS/2 that would assist a game developer and how each relates to other popular platforms. Also: Gaming
  News in the OS/2 world. 


  *** check section on OpenGL ***

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http://www.edm2.com/0511/opengl.html

OpenGL and OS/2
Let There Be Light
Written by Perry Newhook 

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