There seems to be a regression in coreutils from 8.16 to 8.20 that causes a build failure when cross compiling. The build system attempts to execute a cross-compiled binary "make_prime_list". Reproducible: Always
Created attachment 331538 [details] build log
upstream has fixed this in their git already. i added a hack patch for 8.20. http://sources.gentoo.org/gentoo/src/patchsets/coreutils/8.20/050_all_coreutils-primes.patch?rev=1.1