Re: [boost] [wave] preprocess fails using b2

Subject: Re: [boost] [wave] preprocess fails using b2
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2014-06-27 16:00:19

On Friday 27 June 2014 19:53:18 Fletcher, John P wrote:
> I have been using b2 to build the preprocessed files for boost phoenix.
> 
> When I try to do this it now fails with a failure to build thread.cpp
> 
>   "g++-4.6"  -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall
> -pedantic -pthread -Wextra -Wno-long-long -Wno-variadic-macros
> -Wunused-function -pedantic -DBOOST_ALL_NO_LIB=1
> -DBOOST_SYSTEM_STATIC_LINK=1 -DBOOST_THREAD_BUILD_LIB=1
> -DBOOST_THREAD_DONT_USE_CHRONO -DBOOST_THREAD_POSIX
> -DBOOST_WAVE_SUPPORT_THREADING=0 -DNDEBUG  -I"../../.." -c -o
> "../../../bin.v2/libs/thread/build/gcc-4.6/release/link-static/threading-mu
> lti/wavetool-on/pthread/thread.o"
> "../../../libs/thread/src/pthread/thread.cpp"
> 
> ../../../boost/ref.hpp:32:25: error: redefinition of ‘class
> boost::reference_wrapper<T>’ ../../../boost/core/ref.hpp:59:25: error:
> previous definition of ‘class boost::reference_wrapper<T>’
> ../../../boost/ref.hpp:56:75: error: redefinition of ‘template<class T>
> const boost::reference_wrapper<T> boost::ref(T&)’
> ../../../boost/core/ref.hpp:131:74: error: ‘template<class T> const
> boost::reference_wrapper<T> boost::ref(T&)’ previously declared here .
> It looks as though it is picking up two copies of the header file ref.hpp.
> 
> This is the case with both gcc 4.6 and also gcc 4.9.0
> 
> It is not clear to me where the source file is coming from.  At the moment
> all the libraries in my modular boost are checked out as develop.
> 
> This is meaning that I cannot update my preprocessed files.
> 
> Please advise me what to do.

Check that you completely updated all submodules, core and utility in 
particular. If they are fully updated I suspect you may need to remove 
$BOOST_ROOT/boost and run 'b2 headers'.