This option is for checking that the required files have been created during a particular build step.
The option creates a list of files that should have been created and then checks that each one exists in turn. If a file is missing the full name of the file is piped to STDERR.
Note that if this option is specified with abld build, makefiles will not be included in the list of files to be checked.
If the option is specified with abld reallyclean, however, the makefiles will be included in the list.