Nope, not found on FreeBSD. (Also I would kinda doubt that sysctl is standardized?)_CALL_SYSV means that calling convention is SysV one, nothing to do with sysctl, and i wanted you/patch author to run it on FreeBSD/PPC...
Yes, one of _CALL_SYSV, _CALL_AIX, _CALL_DARWIN is always defined by GCC on PPC. Don't know about other compilers.
Paolo