We are building ChromeOs Arm using clang 3.8, we managed to build (almost) everything and an ChromeOs image, but the image fails to boot. I'll start to triage this problem.
I found the corrupted package is openssl. With this piece built with GCC, the images boots. Although I haven't pinpoint to a specific file. I'll create a new bug tracking this - https://llvm.org/bugs/show_bug.cgi?id=25527
*** This bug has been marked as a duplicate of bug 25527 ***