Asio standalone with MSVC and Windows Store target

[remusrg]

Hey guys, I am having linking issues with Visual Studio 2015 (update 3) when building a Universal Windows DLL that uses this library. I downloaded the version straight from master and I am using the following switches in a header file before including anything else:

#define ASIO_WINDOWS_APP
#define ASIO_HEADER_ONLY
#define ASIO_STANDALONE

The link issue seems to be related to the win_tss_ptr_create function, which by the looks of it only gets included if ASIO_WINDOWS. There's some code somewhere looks like that is still referring to this when ASIO_WINDOWS_APP? Anyway, here's the dump from the linker:

1>BroadcastServer.obj : error LNK2019: unresolved external symbol __imp__TlsAlloc@0 referenced in function "unsigned long __cdecl asio::detail::win_tss_ptr_create(void)" (?win_tss_ptr_create@detail@asio@@Yakxz)
1>BroadcastServer.obj : error LNK2019: unresolved external symbol __imp__TlsGetValue@4 referenced in function "public: __thiscall asio::detail::win_tss_ptr<class asio::detail::call_stack<class asio::detail::thread_context,class asio::detail::thread_info_base>::context>::operator class asio::detail::call_stack<class asio::detail::thread_context,class asio::detail::thread_info_base>::context *(void)const " (??B?$win_tss_ptr@Vcontext@?$call_stack@Vthread_context@detail@asio@@Vthread_info_base@23@@detail@asio@@@detail@asio@@QBEPAVcontext@?$call_stack@Vthread_context@detail@asio@@Vthread_info_base@23@@12@XZ)
1>BroadcastServer.obj : error LNK2019: unresolved external symbol __imp__TlsFree@4 referenced in function "public: __thiscall asio::detail::win_tss_ptr::~win_tss_ptr(void)" (??1?$win_tss_ptr@Ucontext_impl@system_executor@asio@@@detail@asio@@QAE@XZ)

For context, I am using this library indirectly via websocketpp, with the following includes/defines:

#define WEBSOCKETPP_CPP11_STL

#include <websocketpp/config/asio_no_tls.hpp>
#include <websocketpp/common/thread.hpp>
#include <websocketpp/server.hpp>

Any idea how I can fix this? Seems to be related to something within asio, not websocketpp.