It is only compile-tested on amd64 at this time.
MIPS build fails with a linking issue for the tests:
...
===> lib/libc/tests/db (all)
===> lib/libc/tests/gen (all)
dlopen_empty_test.o: In function `atfu_dlopen_empty_test_body':
/scratch/tmp/pfg/head/lib/libc/tests/gen/dlopen_empty_test.c:66: warning: warnin
g: mktemp() possibly used unsafely; consider using mkstemp()
/scratch/tmp/pfg/obj/mips.mips/scratch/tmp/pfg/head/tmp/usr/lib/libpthread.so: u
ndefined reference to `__sync_sub_and_fetch_4'
/scratch/tmp/pfg/obj/mips.mips/scratch/tmp/pfg/head/tmp/usr/lib/libpthread.so: u
ndefined reference to `__sync_add_and_fetch_4'
--- nice_test.full ---
...