Re: [Boost-build] Cannot add dependencies to alias

Subject: Re: [Boost-build] Cannot add dependencies to alias
From: Nogradi, Chris (Chris.Nogradi_at_[hidden])
Date: 2011-04-15 14:12:59

Steve,

Could you recommend a way to add dependencies based on the contents of a file as it appears that you are saying that it is not possible with scanners to do this. I would like to support a target that will be built using a number of toolset derived from the contents of a C file. I have this so far:

alias type1 : toolset1 ;
alias type2 : toolset2 ;
alias type3 : toolset1 toolset 2 ;
alias type4 : toolset3 toolset 4 ;

alias toolset1 : <toolset>toolset1 ;
alias toolset2 : <toolset>toolset2 ;
alias toolset3 : <toolset>toolset3 ;
alias toolset4 : <toolset>toolset4 ;

alias build_required_toolsets : dynamically_selected_target ;

where dynamically_selected_target should be one of type1, type2, type3, type4 based upon a regex of the contents of a C file.  I have tried doing this with a scanner and got stuck per below.

Thanks,

Chris

-----Original Message-----
From: boost-build-bounces_at_[hidden] [mailto:boost-build-bounces_at_[hidden]] On Behalf Of Steven Watanabe
Sent: Friday, April 15, 2011 10:55 AM
To: Boost.Build developer's and user's list
Subject: Re: [Boost-build] Cannot add dependencies to alias

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Hash: SHA1

AMDG

On 04/15/2011 08:51 AM, Nogradi, Chris wrote:
> I am trying to add a dependency to an alias from within a scanner's process rule but it is not doing anything.  I tried the following simple example to verify the ability to add a dependency to a alias after it is declared but can't even get it to work:

>
> lib test : test.c ;
> alias t ;
> DEPENDS t : test ;
>
>> bjam.exe t
> ...found 1 target...
>
> What am I doing wrong?
>

t is a main target.  DEPENDS (and scanners)
work with Jam level targets.  i.e. you
can't do this.

In Christ,
Steven Watanabe
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