Found it. The MPI::Datatype class isn't exported in a Win dll (no
dllexport wrappers on the class), so on a shared-libs build it's not in
the library symbols for anything else to see. The Windows CMAKE
"BUILD_SHARED_LIBS" option is therefore busted. On a static lib build
everything's in there, a dumpbin shows all the MPI::Datatype symbols.
Those symbols are missing all the way back into 1.5 shared-lib builds as
well.
Damien
On 21/02/2013 12:19 PM, Jeff Squyres (jsquyres) wrote:
On Feb 21, 2013, at 10:59 AM, Damien Hocking <dam...@khubla.com> wrote:
Well this is interesting. The linker can't find that because
MPI::Datatype::Free isn't implemented on the Windows build (in
datatype_inln.h). It's declared in datatype.h though. It's not there in the
Linux version either, so I don't know where the Linux build is getting that
symbol from, that link should fail too. Is the C++ version of OpenMPI actually
broken overall?
It's implemented in Datatype.cc. I'm don't remember offhand why we didn't put
it in the inline versions. But it's definitely in the generated libmpi_cxx.so:
------
% nm -C libmpi_cxx.so | grep MPI::Datatype::Free
0000000000016ed8 T MPI::Datatype::Free()
%
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