>>> Compiling source in /var/tmp/cross-powerpc64-unknown-linux-gnu/portage/sys-fs/aufs-util-3.6/work/aufs-util-3.6 ...
/mnt/ppc64/etc/crossdev-target/gcc -pipe -O2 -mcpu=cell -mabi=altivec -mgen-cell-microcode -I./libau -Wall -I/mnt/ppc64/usr/src/linux-3.6.11-aufs//include -DMOUNT_CMD_PATH=\"\" -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu ver.c -o ver
./ver: ./ver: cannot execute binary file
make: *** [ver_test] Error 126
* ERROR: sys-fs/aufs-util-3.6 failed (compile phase):
Attach full build.log and paste emerge --info, please. (Also, just from looking at it: the error is probably because it's trying to execute a binary file that was built by a cross-compiler, which would almost certainly fail)
(In reply to comment #1)
> Attach full build.log and paste emerge --info, please.
All the required info is already here.