After GEOMization rawio fails to build on pre-GEOM FreeBSD, such as RELENG_4.
> cd /usr/ports/benchmarks/rawio
In file included from rawio.c:61:
/usr/include/sys/disk.h:31: syntax error before `LIST_ENTRY'
*** Error code 1
Over to maintainer
Thanks for finding the problem -- the build log didn't say it was 4.x
and so when I looked for the problem's source, it didn't appear to exist.
I just excluded non-FreeBSD-5 from including <sys/disk.h> instead, just
because it wouldn't find anything useful there anyway.