NAME:  _libExtensions_rev, _libExtensions_vcmp, _libExtensions_vprt
	- libextensions revision

SYNOPSIS
  #include <stdlib.h>

  const unsigned int _libExtensions_rev; 
  const unsigned int _libExtensions_vcmp; 
  const char         _libExtensions_vprt[5]; 
  const unsigned int _libExtensions_env; 
  
DESCRIPTION

 o  '_libExtensions_rev'

  This constant contains the libextensions revision index.  The revision 
  index is a number that is incremented everytime a new libextensions 
  revision is released.  When the libextensions version number 
  changes, the revision index is not reset to zero.  If _libextensions_rev 
  is zero, the revision index is not available.

 o '_libExtensions_vcmp'

  This constant contains the libextensions version number, suitable for 
  comparing. 
  
 o '_libExtensions_vprt'

  This constant contains the libextensions version number, suitable for
  printing. 

  Example:   printf ("libextensions version: %s\n", _emx_vprt);
  
 o '_libExtensions_env'

  This constant contains bits describing the environment your program 
  is running in:

  0x0020  387 coprocessor present 

  0x0200  Running under OS/2 2.x  (OS/2 2.0, Warp and above)
