Re: [boost] Some statistics about the C++ 11/14 mandatoryBoostlibraries

Subject: Re: [boost] Some statistics about the C++ 11/14 mandatoryBoostlibraries
From: Stefan Seefeld (stefan_at_[hidden])
Date: 2015-05-13 20:13:10

On 13/05/15 08:05 PM, Peter Dimov wrote:
> Stefan Seefeld wrote:
>
>> I want to be able to
>>
>> * fetch the sources of a specific boost library from the repository
>> (that's now possible)
>>
>> * only build that library, using pre-built and pre-installed versions
>> of all prerequisites (that's not yet possible)
>
> That's possible in principle, but not very practical.
>
> Suppose the library L uses X and Y, with Y using X. You have X and Y
> installed as binary packages in /usr/include and /usr/lib.
>
> But the library requires a newer version of X than what you've
> installed. So you fetch the source of X as well and build it. Now L
> builds, but Y is built against the preinstalled older X, whereas L is
> built against the newer X. ODR violation.
>
> We could... in theory... put every revision of every library into
>
> inline namespace d875a68ceb10081e30529e65ddef47297844e9f8 {
>
> but... well.

Huh, the art of over-engineering things, something Boost is very good at.
Sorry, I don't know what else to say.

But back to the point: you say it's possible. How ? (And no, "in
principle" is not good enough.)

        Stefan

-- 
      ...ich hab' noch einen Koffer in Berlin...