Re: [Boost-users] [Thread] Thread library in boost 1.62 broken with g++ 4.6.3 and -std=c++0x

Subject: Re: [Boost-users] [Thread] Thread library in boost 1.62 broken with g++ 4.6.3 and -std=c++0x
From: Edward Diener (eldiener_at_[hidden])
Date: 2016-10-01 10:28:16

On 9/29/2016 2:07 AM, Andreas Wehrmann wrote:
> Hello folks,
>
> I've just wanted to try out the new release and noticed that the Thread
> library was not building.
>
> Assuming this code:
>
> #include <boost/thread.hpp>
> int main( void )
> {
>     return 0;
> }
>
>
> When compiled with -std=c++0x the compilation fails with:
>
> In file included from
> ./boost/boost_1_62_0/boost/exception/detail/exception_ptr.hpp:20:0,
>                  from ./boost/boost_1_62_0/boost/exception_ptr.hpp:9,
>                  from
> ./boost/boost_1_62_0/boost/thread/exceptional_ptr.hpp:10,
>                  from ./boost/boost_1_62_0/boost/thread/future.hpp:25,
>                  from ./boost/boost_1_62_0/boost/thread.hpp:24,
>                  from test.cpp:2:
> ./boost/boost_1_62_0/boost/exception/info.hpp: In instantiation of
> ‘boost::error_info<boost::tag_original_exception_type, const
> std::type_info*>’:
> ./boost/boost_1_62_0/boost/exception/detail/exception_ptr.hpp:95:32:
> instantiated from here
> ./boost/boost_1_62_0/boost/exception/info.hpp:66:5: error: ‘class
> boost::error_info<boost::tag_original_exception_type, const
> std::type_info*>’ has no member named ‘value_’
> ./boost/boost_1_62_0/boost/container/detail/pair.hpp:85:30: warning:
> ‘boost::container::piecewise_construct’ defined but not used
> [-Wunused-variable]
> ./boost/boost_1_62_0/boost/system/error_code.hpp:221:36: warning:
> ‘boost::system::posix_category’ defined but not used [-Wunused-variable]
> ./boost/boost_1_62_0/boost/system/error_code.hpp:222:36: warning:
> ‘boost::system::errno_ecat’ defined but not used [-Wunused-variable]
> ./boost/boost_1_62_0/boost/system/error_code.hpp:223:36: warning:
> ‘boost::system::native_ecat’ defined but not used [-Wunused-variable]
>
>
> Compilation works if I don't use -std=c++0x.
> The exact compiler version is "g++ (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3".
> I'm aware that g++ 4.6.3 is not among the compilers tested for C++11,
> but it is for pre-Cpp11;
> I'm wondering if there is a reason for that which I might not be aware
> of (any known problems?).

This looks like an rvalue references bug in gcc-4.6.3 since error_info 
definitely has a member named 'value_'.

>
> Best regards,
> Andreas