Re: [Boost-users] Serialization, mpl: BOOST_CLASS_VERSION() macro causes gcc compile errors with Boost version 1.43

Subject: Re: [Boost-users] Serialization, mpl: BOOST_CLASS_VERSION() macro causes gcc compile errors with Boost version 1.43
From: Clarke, Carus V (carus.v.clarke_at_[hidden])
Date: 2010-07-01 12:10:05

Robert Ramey wrote:
>
> Clarke, Carus V wrote:
> > Using Boost version 1.43 to compile my project caused the following
> > errors to occur.  There are more, but they are essentially the same:
> >
> > I was able to verify that these were caused by the BOOST_CLASS_VERSION
> > macro appearing on the same line in two or more files included by the
> > file being compiled.  Using the BOOST_PP_COUNTER from the preprocessor
> > library as the argument to a #line directive on the line preceding the
> > BOOST_PP_COUNTER macro can be used as a workaround.  Another was to
> > disable the MPL assertion in the body of the macro.  For class
> > versioning to work for gcc, the BOOST_PP_COUNTER macro has to appear
> > in a header file, and I think it is better to put it in the header
> files for the classes to be serialized.
> >
> > Here is a sample of the workaround:
> >
> > // the next two lines are needed to prevent compile-time errors with
> > gcc #include BOOST_PP_UPDATE_COUNTER() #line BOOST_PP_COUNTER
> > BOOST_CLASS_VERSION(Calculation, 0)
> >
> > Is there a better way to handle the problem?   Is this a bug?
>
> Hmmmm - this will require some thought.  The best thing would be to open up a track item for this so it doesn't get forgotten.
>
> Robert Ramey

Hi,

This problem has been fixed in the SVN trunk version of boost/serialization/version.hpp.  Installing the revised file made the problem go away.

Thanks,

Carus V. (Bud) Clarke
carus.v.clarke_at_[hidden]