Re: [Boost-users] boost includes

Subject: Re: [Boost-users] boost includes
From: Nathan Ridge (zeratul976_at_[hidden])
Date: 2012-03-07 19:10:25

> Hi,
>
> I am new to boost, just trying to use it for the first time. I have a test
> code which uses Boost and I am trying to get it running on my machine. But I
> get an error while compilation:
>
> In file included from /usr/include/boost/mpl/or.hpp:43:0,
> from /usr/include/boost/serialization/smart_cast.hpp:54,
> from /usr/include/boost/archive/detail/oserializer.hpp:41,
> from
> /usr/include/boost/archive/detail/interface_oarchive.hpp:23,
> from
> /usr/include/boost/archive/detail/common_oarchive.hpp:22,
> from /usr/include/boost/archive/basic_text_oarchive.hpp:32,
> from /usr/include/boost/archive/text_oarchive.hpp:31,
> from src/main.cc:1207:
> /usr/include/boost/mpl/aux_/include_preprocessed.hpp:37:90: fatal error:
> boost/mpl/aux_/preprocessed/gcc/||.hpp: No such file or directory
> compilation terminated.

It seems that boost/mpl/or.hpp defines:

#   define BOOST_MPL_PREPROCESSED_HEADER or.hpp

and since 'or' is an alternative token for the '||' operator, the preprocessor
substitutes '||' for it.

I'm not sure whether the preprocessor is supposed to perform this substitution
at this stage or not...

What version of GCC are you using? I tried with version 4.3 through 4.7, and
I do not get this error with them.

Regards,
Nate