Building from sources supped Tuesday produces:

cc  -O2 -Werror -Wall -Wstrict-prototypes -Wmissing-prototypes -mno-fpu -I. -I../../../../arch -I../../../.. -nostdinc -DSUN4C -DRASTERCONSOLE -DKTRACE -DSYSVMSG -DSYSVSEM -DSYSVSHM -DLKM -DCOMPAT_43 -DCOMPAT_10 -DCOMPAT_11 -DCOMPAT_12 -DCOMPAT_13 -DCOMPAT_SUNOS -DCOMPAT_SVR4 -DNFSSERVER -DQUOTA -DFIFO -DINET -DGATEWAY -DNS -DISO -DTPIP -DEON -DNETATALK -DNTP -DIPFILTER_LOG -DMAXUSERS=32 -D_KERNEL  -c ../../../../compat/sunos/sunos_misc.c
../../../../compat/sunos/sunos_misc.c:290: `NFSMNT_SOFT' undeclared here (not in a function)
../../../../compat/sunos/sunos_misc.c:290: initializer element for `sunnfs_flgtab[0].bsd_flg' is not constant
../../../../compat/sunos/sunos_misc.c:291: `NFSMNT_WSIZE' undeclared here (not in a function)
../../../../compat/sunos/sunos_misc.c:291: initializer element for `sunnfs_flgtab[1].bsd_flg' is not constant
../../../../compat/sunos/sunos_misc.c:292: `NFSMNT_RSIZE' undeclared here (not in a function)
../../../../compat/sunos/sunos_misc.c:292: initializer element for `sunnfs_flgtab[2].bsd_flg' is not constant
../../../../compat/sunos/sunos_misc.c:293: `NFSMNT_TIMEO' undeclared here (not in a function)
../../../../compat/sunos/sunos_misc.c:293: initializer element for `sunnfs_flgtab[3].bsd_flg' is not constant
../../../../compat/sunos/sunos_misc.c:294: `NFSMNT_RETRANS' undeclared here (not in a function)
../../../../compat/sunos/sunos_misc.c:294: initializer element for `sunnfs_flgtab[4].bsd_flg' is not constant
../../../../compat/sunos/sunos_misc.c:296: `NFSMNT_INT' undeclared here (not in a function)
../../../../compat/sunos/sunos_misc.c:296: initializer element for `sunnfs_flgtab[6].bsd_flg' is not constant
../../../../compat/sunos/sunos_misc.c: In function `sunos_sys_mount':
../../../../compat/sunos/sunos_misc.c:344: storage size of `na' isn't known
../../../../compat/sunos/sunos_misc.c:357: `NFS_ARGSVERSION' undeclared (first use this function)
../../../../compat/sunos/sunos_misc.c:357: (Each undeclared identifier is reported only once
../../../../compat/sunos/sunos_misc.c:357: for each function it appears in.)
../../../../compat/sunos/sunos_misc.c:371: `NFSMNT_RSIZE' undeclared (first use this function)
../../../../compat/sunos/sunos_misc.c:372: `NFSMNT_READDIRSIZE' undeclared (first use this function)
cc1: warnings being treated as errors
../../../../compat/sunos/sunos_misc.c:344: warning: unused variable `na'
../../../../compat/sunos/sunos_misc.c: In function `sunos_sys_vhangup':
../../../../compat/sunos/sunos_misc.c:879: warning: implicit declaration of function `vgoneall'
*** Error code 1

Stop.

Brad