How I can make rm to single pass secure delete items in macOS?

According to the rm man page rm -P ... overwrites items three times to delete them securely: > -P            Overwrite regular files before deleting them. Files are >                 overwritten three times, first with the byte pattern 0xff, >                 then 0x00, and then 0xff again, before they are deleted. Is it possible to single pass secure delete items with rm ...? Notes: - I don't want to use srm ! I need rm only, please. - I use a MacBook with an HDD and macOS 10.13.