Re: [boost] big problem with dependency changes

Subject: Re: [boost] big problem with dependency changes
From: Bjørn Roald (bjorn_at_[hidden])
Date: 2014-06-20 12:33:55

On 06/20/2014 08:55 AM, Vladimir Prus wrote:
> On 06/19/2014 11:06 PM, Thomas Suckow wrote:
>>> Or is it only running b2 headers that is the problem?
>>
>> Maybe I have missed it in the previous conversations, but why have
>> ./b2 headers make the /boost folder at all? When using boost-build, the
>> headers target can add all the include paths for the various projects.
>> If working on a project not using boost-build, generally I would
>> install boost (at the very least into a folder).
>
> That way, you'd have a command line with 100 -I elements, which is
> rather inconvenient to look at, or run by hand, and can make Windows
> unhappy,

For info:

CMake solves this on Windows (at least for linking) by creating a file 
with commandline options, which can be passed to cl command-line as a 
single filename option.  But this solution is a real pain as these 
temporary files are gone when you want to see what are passed to the 
compiler.  So there is no simple way to trace what is going on when 
something is not working.  Tracing down some problems in cmake on 
windows has been a real pain due to this.

So, in my opinion, if we can manage to get it right, staging the headers 
as b2 headers do is so much simpler to reason about.  Besides that, the 
stage structure is probably how end users will see boost headers.  So 
the developers get to eat their own kake, which is a good thing.

--
Bjørn