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From: David Abrahams (dave_at_[hidden])
Date: 2003-03-05 07:20:38

Sorry it took so long to reply to this...

Markus Schöpflin <markus.schoepflin_at_[hidden]> writes:

> David Abrahams wrote:
>> Vladimir Prus <ghost_at_[hidden]> writes:
>>> Hi Markus,
>>>> any objections to applying the attached patch to
>>>> vacpp-tools.jam? It allows to extend the toolset and overide
>>>> the path to the compiler installation directory. It doesn't
>>>> change anything if the compiler is in the default search path.
>>>> I need this for runnning regression tests on the same machine
>>>> for Visual Age 5 and 6 in one go.
>>> This looks perfectly reasonble to me.
>> Not to me.
> Oops, already applied. :-(
>> Extending a toolset to override installation directory requires
>> that the directory be set as a variable "on" the target, or you
>> will just end up with one global setting for installation directory
>> and you'll just use *one* of the actual toosets (whichever one gets
>> used to generate the last target). Try it with -n -a and inspect
>> the command-lines to see what I mean.
> I don't understand what you mean. I have been using this with two
> toolsets (va5 and va6) which extend vacpp and just override VA_BIN to
> genrate the regression tests and I can't find anything wrong with
> it.

Did you try running regression tests with both toolsets at once,
using more than one target? Do the command-lines actually invoke the
two different compilers you want in each case?

> How should it look like to be correct?
>> I also worry a bit about the use of very generic global variable
>> names which appear to be picked up from the environment (e.g. CXX).
> They are set by bjam build flags and it has been like that for quite a
> while now. IIRC, I asked on the list if this is ok.
>> The philosophy for most toolsets has been to try to avoid relying
>> on environment variables whenever possible. I think that this
>> criticism applies to the current state of the toolset also.
> Hmm, should I just rename the variables?

I'm not sure. It probably doesn't matter all that much; I hope we'll
be on to BBv2 by the time the next release branch is made...

Dave Abrahams
Boost Consulting

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