Re: error building kernel: nfs_clvfsops.o: In function `nfs_mount':, nfs_clvfsops.c:(.text+0x1638): undefined reference to `nfs_diskless_valid'

> Since today's source (FreeBSD 9.0-CURRENT/amd64 (source is: Revision:
> 221060) update I get the follwoing error while building the kernel
> (options NFSD/options NFSCL instead of options NFSSERVER/options
> NFSCLIENT):
> 
> cc -c -O2 -frename-registers -pipe -fno-strict-aliasing -march=native
> -std=c99 -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes
> -W issing-prototypes -Wpointer-arith -Winline -Wcast-qual -Wundef
> -Wno-pointer-sign -fformat-extensions -nostdinc -I. -I/usr/src/sys
> -I/usr/src/s s/contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS
> -include opt_global.h -fno-common -finline-limit=8000 --param
> inline-unit-growth=100 --par m large-function-growth=1000
> -fno-omit-frame-pointer -mcmodel=kernel -mno-red-zone -mfpmath=387
> -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-ss 3 -msoft-float
> -fno-asynchronous-unwind-tables -ffreestanding -fstack-protector
> -Werror
> vers.c
> linking kernel
> nfs_clvfsops.o: In function `nfs_mount':
> nfs_clvfsops.c:(.text+0x1638): undefined reference to
> `nfs_diskless_valid'
> nfs_clvfsops.c:(.text+0x1652): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1658): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1689): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x16d1): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1712): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.o:nfs_clvfsops.c:(.text+0x171b): more undefined
> references
> to `nfsv3_diskless' follow
> nfs_clvfsops.o: In function `nfs_mount':
> nfs_clvfsops.c:(.text+0x1e19): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e2a): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1e31): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e3d): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e44): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e4a): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e50): undefined reference to `nfs_diskless'
> nfs_clvfsops.o:nfs_clvfsops.c:(.text+0x1e57): more undefined
> references
> to `nfs_diskless' follow
> nfs_clvfsops.o: In function `nfs_mount':
> nfs_clvfsops.c:(.text+0x1e65): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1e6b): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1e73): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1e79): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1e80): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e87): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e8e): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e94): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1e9a): undefined reference to `nfs_diskless'
> nfs_clvfsops.o:nfs_clvfsops.c:(.text+0x1ea0): more undefined
> references
> to `nfs_diskless' follow
> nfs_clvfsops.o: In function `nfs_mount':
> nfs_clvfsops.c:(.text+0x1eb3): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1ebd): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1ec4): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1ecb): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1ed2): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.o:nfs_clvfsops.c:(.text+0x1ed9): more undefined
> references
> to `nfsv3_diskless' follow
> nfs_clvfsops.o: In function `nfs_mount':
> nfs_clvfsops.c:(.text+0x1f18): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1f1e): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1f33): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1f3a): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1f4b): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1f52): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1f5e): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1f6a): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1f71): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1f78): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1f83): undefined reference to
> `nfs_diskless_valid'
> nfs_clvfsops.c:(.text+0x1fcc): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x1fd3): undefined reference to `nfs_diskless'
> nfs_clvfsops.c:(.text+0x1fd9): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.c:(.text+0x20ae): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.o:(.data+0x1f8): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.o:(.data+0x258): undefined reference to `nfsv3_diskless'
> nfs_clvfsops.o:(.data+0x2b8): undefined reference to
> `nfs_diskless_valid'
> *** Error code 1
> 
Oops, you'll have to add "options NFS_ROOT" to your kernel config until
I commit a fix.

Thanks for spotting it, rick
ps: And a fresh "config KERNEL" followed by a build. I suspect you already
    did that.