This still causes crashes in mountd on 32bit systems without 
https://marc.info/?l=linux-nfs&m=157250894818731&w=2

mountd: Version 2.4.2 starting
mountd: auth_unix_ip: inbuf 'nfsd fde2:2b6c:2d24:0021:0000:0000:0000:0050'
mountd: auth_unix_ip: client 0x13cd900 '*'
mountd: nfsd_fh: inbuf '* 6 \xd1fb45ab77b345d99b09b3217dcdf2ec'
*** stack smashing detected ***: <unknown> terminated
Aborted

Call chain looks like:

get_rootfh                    utils/mountd/mountd.c
     check_is_mountpoint       support/misc/mountpoint.c
         nfsd_path_lstat       support/misc/nfsd_path.c    *
             xlstat            support/misc/xstat.c        *

where two struct stats are declared on the stack in mountpoint.c without 
including config.h and getting the __USE_FILE_OFFSET64 define, however 
the following two files in the call chain include config.h and get a 
different size struct stat.

Also attached are a few printf formating fixes for 32 bit.

Doug