[Mingw-w64-public] having trouble using WinSDK function

[Dock, D. <dio...@me...>]

I've produced a library built with MinGW64 that can be compiled and linked by MinGW64.  However, when someone tries to link it in a Cygwin environment, they get errors about a missing function:

    foo.o:foo.cpp:(.text+0xfa8): undefined reference to `__imp__MapFileAndCheckSumA@12'

This function is supplied via the Windows Platform SDK in ImageHlp.lib/ImageHlp.dll.

I've tried to statically bind in ImageHlp.lib but the symbol isn't there:

x86_64-w64-mingw32-gcc.exe  -c foo.cpp 
x86_64-w64-mingw32-nm.exe foo.o | find "Map"
                 U __imp_MapFileAndCheckSumA
x86_64-w64-mingw32-gcc.exe  -c foo.cpp -L \temp\mingw_64 -lImageHlp
x86_64-w64-mingw32-nm.exe foo.o | find "Map"
                 U __imp_MapFileAndCheckSumA

Any thoughts on how I can build my library to resolve this dependency?  Would creating an export library do the trick? 

thanks,
-Dion