edit.. it took forever to compile on the rpi.. it seems to be working tho. ill see if they need restarted.
Not sure what options you are using for configure, but probably compile fastest with:
./configure --disable-other-drivers --enable-scrypt --enable-futurebit --disable-sha256d
Also you're more than likely using a quad core rpi so you should do make -j4
My single core atom does the make in 51 seconds, I bet you can do it faster than that.