id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12417	Linking dynamically to boost::locale::info class on Windows fails when auto-linking is disabled	anonymous	Artyom Beilis	"There appears to be a name-mangling issue in boost::locale::info related to a public static member variable of type std::locale::id, only when linking to the DLL on Windows.  When using auto-linking, there is no problem.

== Setup ==
Boost 1.61 (tested on both pre-built and from-source libraries), Windows 10 x64, MSVC 2015 (cl 19.00.24213.1), using x64 compiler.

== Code ==

bugtest.cc

{{{
#include <boost/locale.hpp>
#include <iostream>

int main()
{
    std::locale::global(boost::locale::generator().generate(""en_US.UTF-8""));
    std::cout << std::use_facet<boost::locale::info>(std::locale()).name() << std::endl;
}
}}}

== Compiler Command ==
{{{
cl.exe
-IC:\Boost\include\boost-1_61
-DBOOST_ALL_NO_LIB
-EHsc
-O2
bugtest.cc
-link
-libpath:c:\Boost\lib
boost_locale-vc140-mt-1_61.lib
}}}

== Linker Failure ==

bugtest.obj : error LNK2019: unresolved external symbol ""public: static class std::locale::id boost::locale::info::id"" (?id@info@locale@boost@@2V02std@@A) referenced in function ""class boost::locale::info const & __cdecl std::use_facet<class boost::locale::info>(class std::locale const &)"" (??$use_facet@Vinfo@locale@boost@@@std@@YAAEBVinfo@locale@boost@@AEBV20@@Z)
bugtest.exe : fatal error LNK1120: 1 unresolved externals

== Workaround ==

Force dllimport attribute

{{{
cl.exe
-IC:\Boost\include\boost-1_61
-DBOOST_LOCALE_DECL=__declspec(dllimport)
-DBOOST_ALL_NO_LIB
-EHsc
-O2
bugtest.cc
-link
-libpath:c:\Boost\lib
boost_locale-vc140-mt-1_61.lib
}}}

"	Bugs	closed	To Be Determined	locale	Boost 1.61.0	Problem	invalid