LINK Environment Variables
The LINK tool uses the following environment variables:
LINK, if defined. The LINK tool processes options and arguments defined in the LINK environment variable before processing the command line.
LIB, if defined. The LINK tools uses the LIB path when searching for an object, library, or other file specified on the command line or by the /BASE option. It also uses the LIB path to find a .pdb file named in an object. The LIB variable can contain one or more path specifications, separated by semicolons. One path must point to the \lib subdirectory of your Visual C++ installation.
PATH, if the tool needs to run CVTRES and cannot find the file in the same directory as LINK itself. (LINK requires CVTRES to link a .res file.) PATH must point to the \bin subdirectory of your Visual C++ installation.
TMP, to specify a directory when linking OMF or .res files.