[Boost-build] Test if file exists

Subject: [Boost-build] Test if file exists
From: John Reid (j.reid_at_[hidden])
Date: 2011-09-01 04:48:23

I need to define some targets conditional on a file existing. How can I 
test for this in my Jamfile? Where should I have looked in the 
documentation to find this out?

Thanks,
John.