I've been getting this for the past couple of days' worth of sup'ping, 
using ./build.sh:

/usr/src/bin/sh/eval.c:  In function `syspath':
/usr/src/bin/sh/eval.c:589:  warning: passing arg 4 of `sysctl' from 
incompatible pointer type
/usr/src/bin/sh/eval.c:591:  warning: passing arg 4 of `sysctl' from 
incompatible pointer type
*** Error code 1

Stop.

Any thoughts?  The function in question is:

sysctl(mib, 2, sys_path + 5, &len, 0, 0) != -1
with the culprit being `&len'

Kernel from 1/21, includes + libs + source from 1/22.

Thanks much,
Dave