/FORCE

Syntax:

/FORCE:[ {MULTIPLE|UNRESOLVED} ]

Tells the linker to create a valid executable file or DLL even if a symbol is referenced but not defined or is multiply defined.

The /FORCE option can take an optional argument:

A file created with this option may not run as expected. The linker will not link incrementally with the /FORCE option.

You can select this option in the visual development environment by checking the Force File Output box in the Customize category of the Link tab in the Project Settings dialog box.