Re: [Boost-build] b2 option parsing

Subject: Re: [Boost-build] b2 option parsing
From: Stefan Seefeld (stefan_at_[hidden])
Date: 2016-10-30 22:12:17

On 30.10.2016 22:04, Steven Watanabe wrote:
> AMDG
>
> On 10/30/2016 07:34 PM, Stefan Seefeld wrote:
>> On 30.10.2016 21:21, Steven Watanabe wrote:
>>>> And  what should I do for 'bar' "to be
>>>> registered as a feature in order for it
>>>> to be interpreted as a property of <bar>baz" as you say above ?
>>>>
>>> The function that handles this is build_request.from_command_line.
>>> https://github.com/boostorg/build/blob/develop/src/build/build_request.py#L108
>>> This won't work at all without large parts
>>> of Boost.Build however.
>> I'm not using the above module at all. What do I need to do for jam not
>> to interpret (parts of) the command-line arguments (options, features,
>> targets, etc.) ? Can you resume conceptually how the above (i.e., the
>> existing Boost.Build logic) extracts features such as "toolchain=gcc"
>> from the command line such that jam.c doesn't wrongly interpret this as
>> the name of a target ?
>   If you're bypassing build_system.py, then Boost.Build's
> option processing will be skipped.  The only option
> processing that will happen is the built in b2 option
> processing which cannot be disabled in any way because
> it happens before any Jam/Python code is executed.
> What you can do is replace the list of targets
> before b2 tries to build them by calling UPDATE
> (which I thought you were doing, so there's something
> weird happening here).

Oups, I found the issue...pilot error. Sorry for the noise !
>>>> Further, calling `../../src/engine/bin.linuxx86_64/b2` from an example
>>>> directory yields
>>>>
>>>> ...found 3 targets...
>>>>
>>>> is there a way to have 'b2' print out the names of those 3 targets, or
>>>> even introspect them using the "bjam" module (or some other API for that
>>>> matter) ?
>>>>
>>> -d+12
>> Thanks. Is there a way to access that programmatically ?
>>
> No.

If I wanted to add an API for that, where would I start looking ?

Thanks,
        Stefan

-- 
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