Fix dyn compilation warning on Windows
When building dll on Windows we have to specify what is exported in dll.
We already export of public symbol with __declspec(dllexport).
But we have a lot of warning as our structure/class are including std symbols and we are not exporting them.
See : kiwix/kiwix-build@d2d1f68 (#703)
One solution would be to export ALL symbols in the dll but this should probably made with a generated .def file.
@benoit74 @rgaudin I don't understand how this could then work in the pythin binding!?
Well the problem is not exposed clearly so it's difficult to respond.
My understanding is that we have many warnings regarding stdlib code that we do not explicitly declare. This is different from libkiwix which doesn't declare anything, hence libkiwix being static only.
The python wrapper, on Windows, ends up being a thin pyd file which is a DLL and is linked to the zim-9.dll (and ICU ones).