Re: [Boost-build] selecting Python version for Boost.Python

Subject: Re: [Boost-build] selecting Python version for Boost.Python
From: Stefan Seefeld (stefan_at_[hidden])
Date: 2018-02-06 22:40:29

On 06.02.2018 17:30, Steven Watanabe via Boost-build wrote:
> AMDG
>
> On 02/06/2018 03:07 PM, Stefan Seefeld via Boost-build wrote:
>> OK, I'm attempting to simply change the `python-tag` rule (in Jamroot)
>> to inject the python version (<major><minor>) into the generated name
>> (if it's a library).
>> Additionally to that change, I modified Boost.Python's Jamfile to remove
>> the explicit looping over versions, as per your suggestion:
>>
>> https://github.com/boostorg/python/commit/ae1875b3ac3e90f68900c1c8fe88fa8556dac2e1
>>
>> This works, somewhat: If I have a single "using python" statement in my
>> user-config.jam file, I get libraries "boost_python" and "boost_numpy"
>> with the expected version suffix.
>> However, I only get one ! With more than one "using python" statements,
>> only the first will be built. What am I missing ?
> Did you ask for multiple versions on the command line?

No. I see I misunderstood. Unless versions are explicitly specified on
the command-line, only the first one found is being built. OK, that
works indeed now.
>> (Oh, and in addition, the build path also doesn't include the python
>> version any longer, so even if b2 would do the looping implicitly,
>> different versions of object files would overwrite each other, as per a
>> bug we discussed recently.)
>>
> The version is not included in the path when it is equal to the default.

Indeed, so that works too.

So now that the library name has changed, I suppose there is at least
one other change I need to add: Windows auto-linking support requires
the library name to be encoded in some source (header) file, doesn't it ?

Any other changes I need to make, either to code or build logic, somewhere ?

Thanks !

Stefan

-- 
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