It seems to have been introduced by updating the host kernel. I reverted back to ArchLinux's 3.8.10 and it is now building correctly. Prior to this I tried several params I had found listed elsewhere, vdso_enabled and mmap_min_address (or something like that), but it didn't work. Both were listed as errors with Ubuntu kernel during scratchbox install. vdso_enabled was 1 and mmap.... was 4096. Is there any other options I could try or a method to compare /proc/sys between two kernel versions?