Re: [Boost-bugs] [Boost C++ Libraries] #9087: [boost math] error: no operator "=" matches these operands in roots.hpp (297)

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9087: [boost math] error: no operator "=" matches these operands in roots.hpp (297)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-09-12 20:22:31

#9087: [boost math] error: no operator "=" matches these operands in roots.hpp
(297)
--------------------------------------+-------------------------
  Reporter:  tan@…                    |      Owner:  johnmaddock
      Type:  Support Requests         |     Status:  closed
 Milestone:  Boost 1.55.0             |  Component:  math
   Version:  Boost Development Trunk  |   Severity:  Showstopper
Resolution:  fixed                    |   Keywords:
--------------------------------------+-------------------------

Comment (by anonymous):

 Dear John,

 Thank you very much for the information.  I actually have another issue
 (see code below) using -std=c++11 on the non_central_chi_squared:

 terminate called after throwing an instance of
 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::math::evaluation_error>
 >'
   what():  Error in function
   boost::math::tools::bracket_and_solve_root<e>: Unable to bracket root,
   last nearest value was 1.65974387253907228676e-331
   Abort (core dumped)

 which I built with Intel 13 and GCC 4.6.3:


 {{{
 icpc --version
 icpc (ICC) 13.1.3 20130607

 g++ --version
 g++ (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3

 }}}

 The current trunk (revision 85656) also fails ...
 5.39163355658688321214e+330 was the last nearest value though.

 So I decided to go ahead and upgrade to Intel 14 (again) and the GCC
 toolchain (to 4.7):


 {{{
 icpc --version
 icpc (ICC) 14.0.0 20130728

 g++ --version
 g++ (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) 4.7.3

 }}}

 I have no problem building my original case now.  However, I am unable to
 link ... got this "undefined reference to `__builtin_signbit'" message.

 Interestingly, the example

 {{{

 #include <cstdio>
 #include <boost/math/distributions.hpp>

 int main()
 {
    boost::math::non_central_chi_squared_distribution<>
       _dist( 3.0, 1.0 );

    std::printf( "  \nquantile(non_central_chi_squared(3,1),0.1) = %f\n",
          boost::math::quantile( _dist, 0.1 ) );

    return 0;
 }

 }}}

 which gave me that runtime exception above, also fails to build with the
 same message: undefined reference to `__builtin_signbit'.

 Do you have any insight here?  Maybe this is a problem with the Intel
 compiler again.  :(

 With best regards,
 HS

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9087#comment:5>
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