Re: [boost] [build] Tests automatically create header links, but library builds do not

Subject: Re: [boost] [build] Tests automatically create header links, but library builds do not
From: Peter Dimov (lists_at_[hidden])
Date: 2015-01-03 19:58:03

Andrey Semashev wrote:
> On Saturday 03 January 2015 19:00:30 Peter Dimov wrote:
> > If I remove my boost/ directory, and attempt to build, for example, 
> > atomic, by going into libs/atomic/build and invoking b2, it fails due to 
> > a missing header:
> >
> > Why is that?
>
> That's because Boost.Build is unable to parse #includes made with 
> preprocessor macros. The TypeTraits headers are included from the 
> implementation headers in Atomic, which in turn are included through a 
> macro. Boost.Build does not find those implementation headers and hence do 
> not make TypeTraits a dependency.

Yes, you're right, I picked 'atomic' at random, and it turned out to be 
exactly the wrong choice for this kind of test. Building 'system', for 
example, works. :-)