I 'll tell you I only ran Raspbian on the Pi for AM, I'm not sure what OS you're using. I'll also mention that the "make -j4" switch often produced errors for no reason I could see, it was hit or miss. When I ran "make" without the "-j4" switch it was successful every time. "make -j4" was much faster but also failed a lot, which is useless. This is why the Pi FAQ didn't even mention the "-j4" switch (not to mention that the earlier Pis were only single core).