Incrementally rebuild bjam?

From: David Abrahams (dave_at_[hidden])
Date: 2004-12-09 15:50:44

Hi,

I'd like to be able to issue some command to rebuild bjam only when it's
out of date. I am going to run a script that does this repeatedly and I
don't want to waste CPU cycles rebuilding bjam when it's unneeded. Is
there a way (that doesn't involve knowing the guessed toolset name
beforehand?)

Thanks,
-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com