Install C++ runtime libraries without installing toolchain

[Sven Hazejager]

All,

Is there a way to install the C++ runtime libraries into a NanoBSD images
without installing the whole toolchain? My port needs the libc++
and libcxxrt shared libraries. In my NanoBSD script, I have:

CONF_INSTALL='
WITHOUT_INSTALLLIB=1
WITHOUT_TOOLCHAIN=1
'

It's the WITHOUT_TOOLCHAIN knob that I would like to not switch on, so I am
looking for alternative ways to get the libraries into my image.

I am running 11-CURRENT as of last week.

Thanks
Sven