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

anonymous — Sun, 08 Sep 2013 11:11:37 GMT

It looks to be OK with Intel 14 on Win32... this is in C++11 mode right? Can you try the reduced test case:

#include <tuple>
std::tuple<double, double> f()
{
   return std::make_tuple(1.0, 2.0);
}
int main()
{
   double a, b;
   std::tie(a, b) = f();
}

Thanks, John.

status changed; resolution set

John Maddock — Sun, 08 Sep 2013 16:58:10 GMT

status new → closed
resolution → fixed

Update: I managed to get Intel-14 on Linux installed and the above test case compiles OK, but fails if you increase the tuple to 3 arguments. Filed as Intel issue 6000026407.

A workaround is to define BOOST_NO_CXX11_HDR_TUPLE - that's the fix I've committed to Boost.Config.

anonymous — Mon, 09 Sep 2013 06:28:12 GMT

Dear John,

Thank you very much for locating the problem and putting out a workaround! And I am sorry to have made you work over the weekend! Thank you!

With best regards, HS

anonymous — Tue, 10 Sep 2013 11:12:58 GMT

I've heard back from Intel - the test case works when Intel C++ 14 is on top of gcc-4.7.2 but not 4.6.

HTH, John.

anonymous — Thu, 12 Sep 2013 20:22:31 GMT

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

John Maddock — Sun, 15 Sep 2013 10:43:12 GMT

As the error message indicates it means Intel haven't implemented that GCC builtin yet. If you have an Intel support account, I suggest you file a bug report. Otherwise I might get around to it eventually....

John Maddock — Sat, 28 Sep 2013 16:19:56 GMT

(In [85987]) Merge accumulated patches from Trunk. Refs #8384, Refs #8855, refs #9107, refs #9109, refs #8333, refs #8621, refs #8732, refs #8733, refs #8837, refs #8940, refs #9042, refs #9087, refs #9104, refs #9126.