c++ - How to declare and link to RoInitialize,RoUninitialize,RoGetActivationFactory and HSTRING Functions in Mingw Gcc -

updated: added roinitialize looks in roapi.h

i in process of writing pure c++11 winrt library. not use wrl or c++/cx(obviously if want pure c++11).

i got code compile , run on msvc, want see if can code compile , run on mingw gcc. using gcc 4.7.2 obtained nuwen.net.

what need @ point way call windows api functions roinitialize rounitialize rogetactivationfactory , hstring functions windowscreatestring, windowsduplicatestring, windowsdeletestring.

i tried compiling program in g++ got error

extern "c"{ __declspec(dllimport)int __stdcall roinitialize(int); } int main(){     roinitialize(1); } 

i tried compile, got

c:\users\jrb\desktop>g++ gccwinrt.cpp c:\users\jrb\appdata\local\temp\ccy7y1v9.o:gccwinrt.cpp:(.text+0x1e): undefined reference `_imp__roinitialize@4' collect2.exe: error: ld returned 1 exit status 

if can point me in right direction on how declare these functions , libraries need link to, appreciate it. if required loadlibrary/getprocaddress still ok that

update: here roinitialize looks in header roapi.h

roapi _check_return_ hresult winapi roinitialize(     _in_ ro_init_type inittype );  roapi define __declspec(dllimport) _check_return_ part of sal (secure annotations language?) hresult maps int32 winapi define __stdcall ro_init_type enumeration int should cover 

the import library these functions runtimeobject.lib (which msdn documentation fails mention). can found in windows sdk windows 8.