[Omake] Locking and NFS

[Phil Endecott]

Dear OMake experts,

I like the look of OMake and look forward to being able to try it out.  
Unfortunately I have not got very far yet due to this:

$ omake hello
Fatal error: exception Failure("Failed to lock the file .omakedb.lock: 
No locks available")

This is an NFS filesystem and it does not support locking.

I have read bug 555 (http://bugzilla.metaprl.org/show_bug.cgi?id=555) 
and it points out that the "--dotomake dir" option can be used to move 
the cache files to somewhere other than $HOME/.omake, i.e. a filesystem 
that does have locking.  But the error that I'm getting is not with 
$HOME/.omake, it's with ./.omakedb.lock.  Is there a way to put this 
file somewhere different?

Can you help me understand what purpose these locks serve?  There is no 
chance of me running two simultaneous builds in the same directory.  It 
is possible but unlikely that I might want to build two different 
projects in different directories simultaneously (hence the locks in 
$HOME/.omake I suppose).

Note that it takes several seconds for the above error to appear - I 
think there is some sort of timeout occuring.  So just downgrading this 
error to a warning is not really a good enough solution.

Many thanks for any suggestions.

Phil.