On 17/08/2018 18:32, Tim Roberts wrote:
.........
It's not an error, it's a warning. And this has nothing to do with C++. Is this your own private project, or is it one I can go
look up?
it's an experiment to see if the ageing libart_lgpl code which reportlab uses can be replaced with something based on antigrain so
not yet public. However, I see a similar error in aggdraw (se eg https://github.com/pytroll/aggdraw).
I looked in the preprecessor output(_aggstate.i) and see this single occurrence
of aggstate_init
#line 1191 "_aggstate.cxx"
extern "C" __declspec(dllexport) void init_aggstate(void)
{
aggstate_init();
}
is this some feature of C++ or is there a real issue here?
My guess is that you have listed "init_aggstate" in the ".def" file that lists the exported functions. That's the first export
specification. You are also using __declspec(dllexport) in the function definition, and that's the second export specification.
When you use __declspec(dllexport), you don't need the ".def" file.
I don't have a .def file; the compilation is being handled purely by python setup.py build_ext which might be creating a temporary
one somehow, but I cannot find it. Needless to say this is happening only on windows. I have these in temp
C:\code\hg-repos\taggstate\REPOS\aggstate>ls build\temp.win-amd64-2.7\Release
_aggstate.exp _aggstate.obj agg25
_aggstate.lib _aggstate.pyd.manifest
digging a bit deeper I find taht the problem comes from the exp file and the linker /EXPORT. It seems that the
/EXPORT:init_aggstate can be suppressed for this build and the warning disappears, but something (I assume the exp) supplies the
export. Certainly the pyd appears to work.
--
Robin Becker
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