Problems linking c++/SWI executable for Windows

Got my SWI-powered app compiling and running on Linux and OSX. Not yet
succeeded on Windows.

I installed all the MinGW/gcc toolchain stuff today, and everything appears
to be compiling as on the other two platforms, but it seems to be falling
at the final linking hurdle. swipl-ld builds the two object files I was
expecting without any apparent problems. But then it calls the final link
phase to build the exe:

*g++ -o s2.exe  s_int.obj s_helpers.obj -L"c:/program files/swipl/lib"
-lswipl*

At this point, it spits out a slew of linker errors:

*s_helpers.obj:s_helpers.cpp:(.text+0x50c): undefined reference to
`PL_new_term_ref'
*
*s_helpers.obj:s_helpers.cpp:(.text+0x52f): undefined reference to
`PL_put_nil'*
etc.

In short, even though it finds either *libswipl.dll.a *or (?) *libswipl.lib*in
*c:/program files/swipl/lib* (and complains if I move or rename them), it
appears not to know what any of the Prolog-specific elements are at link
time.

Anyone know what's likely to be going on?

This is a 64-bit Win7 environment, btw. (And I'm attempting the compile
from inside a MinGW32 window.)

Running the swipl repl works fine.

Thanks,

KJ
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