I was trying to build libusb using the falconwing tools from the adafruit tutorial and was having an issue with libtool in link mode. My gnu / Linux skills are weak, but it looks like the problem is that /usr/lib/libstdc++.la has bad paths which are pointing to /lib rather than /usr/lib.

I just renamed it out of the way, which got around the problem, but maybe somebody who knows a lot more than I has a real fix?