Get time at compile-time

[drkameleon]

Silly question - and not such an important one - but I thought I was doing 
right only to realize I wasn't.

So, how can I do something equivalent to the following?
    
    
    let buildTime = static now()
    
    
    Run

This leads to:
    
    
    Error: cannot 'importc' variable at compile time; gettimeofday
    
    
    Run