Re: [Boost-build] [Boost-users] [boost-build]how to configure custom targets

Subject: Re: [Boost-build] [Boost-users] [boost-build]how to configure custom targets
From: Sandeep Gupta (gupta.sandeep_at_[hidden])
Date: 2009-01-27 13:55:33

On Tue, Jan 27, 2009 at 10:08 AM, Vladimir Prus <ghost_at_[hidden]> wrote:

>
> On Tuesday 27 January 2009 09:40:32 Sandeep Gupta wrote:
> > Hi Steven,
> >  Thanks.  I should be able to fix it using this info. However I have hit
> > another, but somewhat related, roadblock.  Tried  the documentation but
> > failed to find relevant snippets.
> >
> > Using generators i have created these two custom rules
> > 1) mp a : a.gp ;
> >             which converts a.gp to a.mp
> > 2) mps a : a.mp
> >             which converts a.mp to a.mps
> >
> > Invoking bjam complains "unable to find target a.mp".  The problem is that I
> > am unable to specify that "a.mp is generated by rule 1".
> > In case i am missing something obvious please point me to relevant portion
> > of the documentation.
>
>
> Sandeep,
>
> Please provide a minimal project reproducing this problem. The above description
> leaves enough freedom to make it impossible to diagnose the problem.
>
> Thanks,
> Volodya
>
>

 Hi Volodya,

Let me explain the project:
File mpTOmps.jam has following entry
                import type ;
                type.register MP : mp ;
                type.register MPS : mps ;
                import generators ;
                generators.register-standard mp.inline-file : MP : MPS ;
                actions inline-file
                {
                    "./tomps.sh" $(>) $(<)
                }

This allows me to write in jamfile:
                mps a : a.mp  ;

Similarly file gpTOmp.jam has following entry
                import mpTOmps;
                import type ;
                type.register GP : gp ;
                import generators ;
                generators.register-standard gp.inline-file : GP : MP ;
                actions inline-file
                {
                        "gnuplot" $(>)
                }
Hence i can write mp  a : x.gp ; where "gnuplot x.gp" will produce a.mp.

Now I am getting error "No best alternative for a".  I think the
problem is that somehow i have to express that a.mps is dependent upon
a.mp. It could be that I am wrong and overlooking something very
trivial.

Thanks
Sandeep