Yes, in the script I have it install optware-devel and buildroot. With those two packages you should be able to compile linux software. It won't necessarily work the same with each software package, but in general to compile you'll run…
./configure —prefix=/opt
make
make install
Some software will require additional libraries (wview needs a ton). If available, use the ones from optware, or compile it yourself if not available.
It looks like in order to get the webui going with wivew, you'll also need to install web server software (apache, nginx, etc) with php. You'll likely have to change a variable in php.ini to point to the html file location, along with whatever web server software you use. Just curious, does the weather station use usb to connect? or something else?