Re: [Boost-users] autolink include guard ?

From: John Maddock (john_at_[hidden])
Date: 2006-09-26 14:16:36

Robert Ramey wrote:
> I notice that when my tests build I get
>
> Linking to lib file: libboost_serialization-vc71-mt-gd-1_35.lib
> Linking to lib file: libboost_serialization-vc71-mt-gd-1_35.lib
>
> I was curious as to why I go two such messages.  Looking at
> auto_link.hpp I see
> that there is no include guard no a #pragma once.  Is there a reason
> for this?

Yes, you can link to more than one library, so it does need to be capable of 
being included more than once (think about what happens if you are using 
serialisation, regex and filesystem in the same application).

If you're seeing two messages then you must be including the header from 
more than one location (for the same library), which is potentially error 
prone?

John.