When first installing the SDK and building a sample project, the following error is echo’d in the dosshell
bash.exe - could not find /tmp, please create
I couldn’t find how to solve this on the forum so here’s what worked for me: Simply create a directory called /tmp in the root directory i.e in C:\tmp
AFAIK, you can just forget about this message. It’s due to some hack to run a dumbed-down version of cygwin.
Generally speaking, don’t rely on the building script messages too much: most of what’s output is misleading or even plain false, and useful messages are either drown under that flow of pointless traces, or not printed at all 
Things should improve a lot when the transition to Eclipse will be completed.