Re: [Boost-bugs] [Boost C++ Libraries] #12234: boost::multiprecision x64 win32 hard compile errors on windows with mpir

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #12234: boost::multiprecision x64 win32 hard compile errors on windows with mpir
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-05-30 13:31:31

#12234: boost::multiprecision  x64 win32 hard compile errors on windows with mpir
-------------------------------+----------------------------
  Reporter:  tlyons@…          |      Owner:  johnmaddock
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  multiprecision
   Version:  Boost 1.61.0      |   Severity:  Showstopper
Resolution:                    |   Keywords:  mpir x64
-------------------------------+----------------------------

Comment (by tlyons@…):

 I should have given the code example that triggered the problem. Uncomment
 the relevant part and it runs successfully:

 {{{
 #include "stdafx.h"
 #include <boost/multiprecision/gmp.hpp>
 #include <boost/math/special_functions/gamma.hpp>
 #include "Safeint3.hpp" // for a safe fix: http://safeint.codeplex.com/

 #include <iostream>

 namespace boost {
         namespace multiprecision {

                 template <unsigned Digits10>
                 struct gmp_float;

                 typedef number<gmp_float<100> >   mpf_float_100;
         }
 } // namespaces

 /*
 // uncomment this block to fix the code

 double __gmpf_get_d_2exp(long * p, mpf_srcptr a) {
         mpir_si temp{ *p };
         double b = __gmpf_get_d_2exp(&temp, a);
         *p = SafeInt<long>(temp);
         return b;
 }
 */
 using namespace boost::multiprecision;
 int fourth() {
         mpf_float_100 b = 2;
         std::cout << std::numeric_limits<mpf_float_100>::digits <<
 std::endl;
         // We can use any C++ std lib function:
         std::cout << log(b) << std::endl; // print log(2)// ERROR on this
 line
         // We can also use any function from Boost.Math:
         std::cout << boost::math::tgamma(b) << std::endl;
         // These even work when the argument is an expression template:
         std::cout << boost::math::tgamma(b * b) << std::endl;

         return 0;
 }
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12234#comment:1>
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