Files you'll need to compile with MSC 5.1 or IBM C/2 1.1 under OS/2:

Make files:
    MAKEFILE.DBG
    MAKEFILE.OS2
    GO.CMD
Source files:
    POLYXARC.C
    PAKSORTM.C
    DIRFIND.C
Header files:
    P_COMMON.H
    PAKMDEFN.H
    IBM SDK 1.2 or higher

Instructions:
    With MSC 5.1 or C/2 1.1 correctly installed, invoke GO in the
    source subdirectory.  In order for the IBM SDK to work correctly
    with MSC 5.1, the INCLUDE and LIB environmentals must have the
    IBM SDK files first.  This GO.CMD and MAKEFILE.OS2|.DBG expect
    the IBM Make/2 2.0 utility distributed with C/2 1.1, not the MSC
    Make.  If you are making changes or encountering Link problems,
    invoke GO as "go debug" to use the alternate compile.  If you
    make significant changes, its best to recompile with "go all" or
    "go debug all" to first delete all object files.  The Winable
    utility from the IBM SDK is used to mark the EXE file as Windowable.