Contents of the which 2.0 archive:

  Contents      this file
  README        brief "what it be" file
  Makefile      makefile for almost every OS/2 compiler, plus one for MS-DOS
  which.1       manual page, nroff format
  which.doc     manual page, human-readable format
  which.c       C source code
  which.def     OS/2 linker definition file
  which.exe     bound (16-bit OS/2 & MS-DOS) executable, compiled with MSC 6.0

The makefile has targets for most OS/2 compilers (not Zortech), thanks
to Kai Uwe Rommel's Info-ZIP efforts, but only the "mscbnd", "msc", "gcc"
and "ibm" targets have been tested.  I'm not even sure all the switches 
are right for those... :-)  The "mscbnd" target is the default, since it
results in a "universal" executable.
