flock() and sendmail

[John Kelly <jak@isp2dial.com>]

sendmail defines HASFLOCK=0, apparently because, as configure says:

># flock() doens't work over NFS and there's a rumour of b0rkedness in
># Linux 2.4.x kernels ;(


and include/sm/conf.h says:

>**  NOTE: Override HASFLOCK as you will but, as of 1.99.6, mixed-style
>**      file locking is no longer allowed.  In particular, make sure
>**      your DBM library and sendmail are both using either flock(2)
>**      *or* fcntl(2) file locking, but not both.


I don't need NFS with sendmail.  Surely flock() is not *still* broken
in 2.6 kernels?

Any advice?