Re: [Boost-build] dtrace success

From: Khassapov, Alex (Alex.Khassapov_at_[hidden])
Date: 2008-04-02 02:26:54

Thanks again, I've done this aready, and I will try the code you
suggested :-)

-----Original Message-----
From: boost-build-bounces_at_[hidden]
[mailto:boost-build-bounces_at_[hidden]] On Behalf Of Vladimir Prus
Sent: Wednesday, 2 April 2008 3:41 PM
To: Boost.Build developer's and user's list
Subject: Re: [Boost-build] dtrace success

On Wednesday 02 April 2008 04:14:24 Khassapov, Alex wrote:
> Thanks to Volodya, I have dtrace generator working!

Ah, I see you've solved the duplicate target issue by explicitly
creating objs and then passing them on EXE generator.
I was going to sketch some code to make that unnecessary, but that was
going to be hacking for the time being.

> The generator produces an executable modified by dtrace.  Now I
realised
> that we also need a dtrace library generator.  I could simply copy and
> modify the code from dtarce.jam (attached), but I wonder how to do it
> properly (bjam way)?

Well, I don't think "proper" way here is anyway different than in any
language.
I think you can extract most of the code into a separate function, and
then
the body of the 'run' method will be just:

  return [ generators.construct $(project) $(name) 
           : EXE : $(property-set) : $(.libs) 
           [ process-objs ..... ] ] ;

and the lib generator would do the same. In fact, to make things even
less
copy-pasted:

1. Define the generators __init__ rule as:

    rule __init__ ( * : * )
    {
        generator.__init__ $(1) : $(2) : $(3) ;
        self.supertype = $(4)  ;
    }

2. Instead of hardcoding EXE, use

    $(self.supertype)

3. Declare two generators like:

        generators.register [ new dtrace-binary-generator dtrace.binary
: : EXE : DTRACE_EXE ] ;
        generators.register [ new dtrace-binary-generator dtrace.binary
: : LIB : DTRACE_LIB ] ;

But I think that starting with two generators, and a common function
extracted from current
'run' method should be fine.

- Volodya
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