Re: [Boost-build] [Boost][Build][v2] Adding command line options

From: Rene Rivera (grafikrobot_at_[hidden])
Date: 2006-09-09 00:42:58

K. Noel Belcourt wrote:
> I want to initialize a constant using a command line value if one is  
> supplied by the user or with some default of my choosing if no  
> argument is supplied.  Something like this though clearly this is  
> illegal since you can't change a constant.
> 
> constant sierra-root = [ MATCH "^--sierradir=(.*)" : $(argv) ] ;
> sierra-root ?= /sierra/Release ;
> 
> So how can I initialize a constant in one step, either with a value  
> from the command line or with some specified default value.

You can't do it in one assignment if that's your question. What you 
have, except for the "constant", seems fine to me. Is there some reason 
you need to do it in one assignment?

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