Building ar71xx on a Debian 6 VM box. Nothing has been modified in this box as far as build environment.
Fresh git clone. Makefile modified so distclean doesn't delete downloads. make distclean ran between builds, except after that 1st failed one.
make FULL_BUILD=true ar71xx.usb_large
Limiting to 1 thread works, but OMFG THE PAIN!
Unmodified build.sh fails.
After the multithreaded build bombs, make V=99 in ar71xx-src builds without error, same result as ispyisail.
Limiting to 4 threads fails.
Limiting to 2 threads fails.
Peculiar. I'm going to do some more playing, going back in openwrt builds.