? defaultversion : <vmake_version>

You can use this option in processing lists and link descriptions.

This option defines the VMAKE version to be used to process the following listed files.

To specify a different version subsequently, use the ? defaultversion : <vmake_version>option. This option, therefore, can be used repeatedly in a description file.

To reset VMAKE to the VMAKE version specified in the call, use the ? defaultversion :  option.