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: Emil Dotchevski (emildotchevski_at_[hidden])
Date: 2016-10-03 01:27:44

There is an open bug for this, https://svn.boost.org/trac/boost/ticket/11874.
I don't have that version of GCC installed, I'll see if I can install it
tomorrow. The fix suggested by apolukhin is worth a try.

Emil

On Sat, Oct 1, 2016 at 7:28 AM, Edward Diener <eldiener_at_[hidden]>
wrote:

> 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_'.