When I attempt to build the b43 firmware from makepkg, it says "==> ERROR: Cannot fing the strip binary required for object file stripping." Please keep in mind that I am using the install usb because I can't connect to the internet. The fwcutter is installed as well. Thank you for reading.
The live media unfortunately does not include all of base-devel. You need the binutils package, which has /usr/bin/strip. The live media is really meant to be used with internet access, but I see your dilemma here.
You obviously have internet access on something though, so why not download the package itself (or look in /var/cache/pacman/pkg if you installed base-devel on the on-disk system) and install it into the live media with pacman -U.