Re: [Boost-users] auto_link question

From: John Maddock (john_at_[hidden])
Date: 2006-10-03 05:01:34

Robert Ramey wrote:
> Hmmm - but why is it a mistake?

Well it's harmless, but basically the auto-link header *cannot* be include 
guarded because it really does have to be included multiple times, albeit 
normally for different libraries.  So if you include it multiple times for 
the same lib, you will - if you have diagnostic messages turned on - get two 
messages rather than one.  But that's it, other than that it's harmless.  To 
prevent the multiple diagnostics just add your own include 
serialisation-specific guard around it:

#ifndef BOOST_SERIALISATION_AUTO_LINKED
#define BOOST_SERIALISATION_AUTO_LINKED
// auto line setup goes here

#endif

and repeat in all the places where you need it.

Or factor out into a separate header of course.

John.