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

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. We discussed this on the list in the MPL.Core-related thread.