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The use of the WATCOM environment variable and the Watcom Linker "SYSTEM"
directive is recommended over the use of this environment variable.

If you are developing an OS/2 application, the LIBOS2 environment variable
must include the location of the 16-bit Watcom C/C++ OS/2 library files
(files with the ".lib" filename extension).  This variable is used by the
Watcom Linker (WLINK.EXE).  The default installation directory for the
16-bit Watcom C/C++ OS/2 libraries is \WATCOM\LIB286\OS2.  The LIBOS2
environment variable must also include the directory of the OS/2
DOSCALLS.LIB file which is usually \OS2.  The LIBOS2 environment variable
must also include the location of the 16-bit Watcom C/C++ math library
files.  The default installation directory for the 16-bit Watcom C/C++ math
libraries is \WATCOM\LIB286.

Example:

     C>set libos2=c:\watcom\lib286\os2;c:\watcom\lib286;c:\os2