Could you please add an option for naming a file that contains a list of
files to be searched? Possibly --filelist=
Since globbing doesn't work at all when pcregrep is built in some
environments, the user could create a list by piping from the dir command.
The option could also be used to facilitate special searches. E.g., to
look only in the set of files that contained matches for a previous
execution of pcregrep.