cannot represent machine `mips:amd64'

Starting today, I get this error for several mips targets whenever I
do "make universe".  Does anybody know what might be causing it?  I
see it for mips.mips64, mips.mipsn32, and mips.mips64el .

--------------------------------------------------------------
>>> stage 4.2: building libraries
--------------------------------------------------------------
===> gnu/lib/libssp/libssp_nonshared (obj,all,install)
===> gnu/lib/libgcc (obj,all,install)
===> lib/libcompiler_rt (obj,all,install)
===> gnu/lib/csu (obj,all,install)
===> lib/csu (obj,all,install)
===> lib/csu/mips (obj)
===> lib/csu/mips (all)
===> lib/csu/mips (install)
===> lib/libcompiler_rt (obj,all,install)
===> lib/libc (obj,all,install)
===> lib/libc_nonshared (obj,all,install)
/scratch/tmp/asomers/obj/mips.mips64/home/asomers/freebsd/head/tmp/usr/bin/ld:
cannot represent machine `mips:amd64'
--- libc.so.7.full ---
*** [libc.so.7.full] Error code 1

-Alan