Qt5 components found but not Qt5 itself?!

[René J.V. Bertin]

Hi,

Can anyone explain why I'm seeing this (on Mac OS X using Qt5 5.6.2 from MacPorts):

> -- The following REQUIRED packages have been found:
>  * ECM (required version >= 1.7.0)
>  * KF5Archive (required version >= 5.7.0)
<snip>
>  * KF5 (required version >= 5.7.0)
>  * Qt5Core
>  * Qt5Gui
>  * Qt5Network
>  * Qt5PrintSupport
>  * Qt5Svg
>  * Qt5Test
<snip>
>  * Qt5Quick
<snip>
>  * Qt5Xml
>  * Qt5Widgets
>  * Qt5WebKitWidgets
<snip>
> -- The following REQUIRED packages have not been found:
>  * Qt5 (required version >= 5.3.0)

That doesn't make much sense, does it? 

Thanks,
R.