id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13508	Errors compiling float128.h on windows with icc 17.0 and MSVC 14.11 toolchain	Metodi Nikolov <metodi.nikolov@…>	John Maddock	"The example code from the help here [https://www.boost.org/doc/libs/1_66_0/libs/multiprecision/doc/html/boost_multiprecision/tut/floats/float128.html] cannot be compiled on windows using intel compiler version 17.0.6 and MSVC v14.11 toolchain. The errors reported are: 
{{{
1>G:\Libraries\boost_1_66_0\boost/multiprecision/float128.hpp(487): error : identifier ""fmaq"" is undefined
1>     result.value() = fmaq(a.value(), b.value(), c.value());
1>                      ^
1>
1>G:\Libraries\boost_1_66_0\boost/multiprecision/float128.hpp(492): error : the global scope has no ""signbitq""
1>     return ::signbitq(arg.value());
1>              ^
1>
1>G:\Libraries\boost_1_66_0\boost/multiprecision/float128.hpp(556): error : the global scope has no ""copysignq""
1>        return ::copysignq(a.backend().value(), b.backend().value());
1>                 ^
1>
1>G:\Libraries\boost_1_66_0\boost/multiprecision/float128.hpp(561): error : identifier ""remainderq"" is undefined
1>        result.value() = remainderq(a.value(), b.value());
1>                         ^
1>
1>G:\Libraries\boost_1_66_0\boost/multiprecision/float128.hpp(565): error : identifier ""remquoq"" is undefined
1>        result.value() = remquoq(a.value(), b.value(), pi);
1>                         ^
}}}

Please note that newer MSVC toolchain versions seem to break the intel compiler (and the default version for MS2017 is newer), while for icc 18.0 one needs to remove -Za or the /permissive- options as they also need to problems with the compilation.
"	Bugs	closed	To Be Determined	multiprecision	Boost 1.66.0	Problem	fixed