$ man mail.mailutils --config-help show configuration file summary
--show-config-options show compilation options ^^^^^^^^^^^ Well I would then have both: --show-compilation-options --show-config-options (deprecated) show compilation options Why? First, we don't want to break scripts, so we'll leave --show-config-options, but mark it as deprecated. Second, certainly --show-compilation-options is what this option really should have been named, so we'll add it. (So please add it.)