Re: [boost] [fusion] trouble building boost fusion with Intel compiler on Windows and Linux

Subject: Re: [boost] [fusion] trouble building boost fusion with Intel compiler on Windows and Linux
From: Lee Clagett (forum_at_[hidden])
Date: 2016-11-06 00:15:43

On Fri, 4 Nov 2016 14:27:01 +0000
"Blower, Melanie" <melanie.blower_at_[hidden]> wrote:

> Hello,
> 
> We are having trouble building boost_fusion version 1.61 with Intel
> compiler (version 17.0) on Linux, and on Windows with vs2015 (and
> other versions of visual studio).  
> 
> The problem can be fixed if I made this change to
> boost/fusion/container/vector/detail/config.hpp :
> 
> // Sometimes, MSVC 12 shows compile error with std::size_t of
> template parameter .
> #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1800)) \
>         || BOOST_INTEL  /* add this line */
> # if defined(BOOST_FUSION_HAS_VARIADIC_VECTOR)
> #   undef BOOST_FUSION_HAS_VARIADIC_VECTOR
> # endif
> #endif 
> 
> Symptom on Windows:
> ile ..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj.rsp
> "algorithm\fold.cpp"
> -Fo"..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj"
> -TP /Z7 /Od /Ob0 /W3 /GR /MDd /Zc:forScope /Zc:wchar_t /nologo /Qwn5 /Qwd985
> -Qoption,c,--arg_dep_lookup /Qvc14 -Qpchi- /wd4675 /EHs    -c
> -DBOOST_ALL_NO_LIB=1 "-I..\..\.."
> compile-c-c++ ..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj
> 
>     icl
> @"..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj.rsp" 
> 
> fold.cpp
> ../../../boost/fusion/container/vector/vector.hpp(71): error:
> namespace "boost::fusion::vector_detail::result_of" has no member
> "value_at_c" : boost::is_convertible<Sequence, typename
> result_of::value_at_c<This, 0>::type> ^ detected during:
>             instantiation of class
> "boost::fusion::vector_detail::is_convertible_to_first<Sequence,
> This, <unnamed>> [with Sequence=int, This=boost::fusion::vector<int>,
> <unnamed>=1]" at line 305 instantiation of
> "boost::fusion::vector<T...>::vector(U &&...) [with T=<int>,
> U=<int>]" at line 159 of "algorithm\fold.cpp"
> 
> Symptom on Linux:
> The original failure on Linux (zip.test in boost_fusion)
> 
>     "icpc" -c -xc++ -O0 -g -w1 -inline-level=0 -fPIC -m64
> -DBOOST_ALL_NO_LIB=1 -I"../../.."   -c -o
> "../../../bin.v2/libs/fusion/test/zip.test/intl-lnx/dbg/algorithm/zip.o"
> "algorithm/zip.cpp"
> 
> ../../../boost/fusion/container/vector/vector.hpp(230): error: pack
> "U" does not have the same number of elements as "I" : store<I,
> T>(std::forward<U>(var))... ^
>           detected during:
>             instantiation of
> "boost::fusion::vector_detail::vector_data<boost::fusion::detail::index_sequence<I...>,
> T...>::vector_data(boost::fusion::vector_detail::each_elem, U &&...)
> [with I=<0UL, 1UL>, T=<boost::fusion::vector_iterator<const
> boost::fusion::vector<int, int>, 0>,
> boost::fusion::vector_iterator<const boost::fusion::vector<char,
> char>, 0>>, U=<const boost::fusion::transform_view<const
> char>boost::fusion::vector<const boost::fusion::vector<int, int> &,
> char>const boost::fusion::vector<char, char> &>,
> char>boost::fusion::detail::poly_begin, boost::fusion::void_> &>]" at
> char>line 306 instantiation of "boost::fusion::vector<T...>::vector(U
> char>&&...) [with T=<boost::fusion::vector_iterator<const
> char>boost::fusion::vector<int, int>, 0>,
> char>boost::fusion::vector_iterator<const boost::fusion::vector<char,
> char>char>, 0>>, U=<const boost::fusion::transform_view<const
> char>char>boost::fusion::vector<const boost::fusion::vector<int, int>
> char>char>&, const boost::fusion::vector<char, char> &>,
> char>char>boost::fusion::detail::poly_begin, boost::fusion::void_>
> char>char>&>]" at line 41 of
> char>char>"../../../boost/fusion/view/zip_view/zip_view_iterator.hpp"
> 
> Thanks and regards,
> Melanie Blower (I work for Intel on the Intel C++ compiler)
> 

This is disabling variadic vector (which hopefully compiles faster) for
all versions of the Intel compiler. This might be the easiest way to
fix it since no one has has access to that compiler. I also wanted to
mention:

  - The master branch has numerous updates that should be in Boost
    1.63. I think the second case is fixed but its difficult with such
    little context.
  - Try `#include <boost/fusion/sequence/intrinsic/value_at.hpp>` before
    any other includes to fusion for the first issue. The preprocessor
    output for clang is showing that the required struct is being
    included very indirectly, so there might be something different on
    that configuration that is dropping it. Also, the master branch
    might be worth testing - it uses the tag-dispatched specialization
    directly so that the `value_at` header never has to be included.

Lee