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This page has information about supporting cross-compilation for the kselftest feature of the Linux kernel
Grant Likely has taken the lead of this effort, stating on the kernel summit mailing list that: (write what grant wrote here)
In August, 2014, Grant Like wrote (on the ksummit-discuss mailing list: I've also been doing some hacking. I've taken a good look at several of the tools people are using. Guenter's scripts. Kevin & Olof's scripts, your ttc, and the stuff I'm using personally, and then started a new tool for booting and testing boards, pulling in bits and pieces that look good. I've been able to come up with something that works really well for me, will boot on qemu out-of-the-box, and is easily extendible to real hardware like a board on a desk or a personal board farm. I'll post my patches this coming week. Right now I'm cleaning up some ugly bits and I need to graft in the logging from Kevin's scripts.