> just downloaded fltk 1.3.3 (trying to update from 1.1.10
> and compiling in VS2015). When using FLTK in my app, I came
> across a lot of inconsistent dll linkage warnings

> \FL/Fl_Device.H(216): warning C4273: 'fl_copy_offscreen':
> inconsistent dll linkage

> I don't exactly know what it means, except that the compiler
> thinks it is both implemented and imported..

> I wonder whether more people run into this warning, or that I
> am doing something wrong...


Hard to say for sure without seeing more of your code, or how you are building/linking it, I suspect. 

However, there haven't been a lot (any?) reports of others seeing that issue, AFAIK.

Are you using the DLL build? Do you *need* to use the DLL, or could you try static linking?

FWIW, I never see this error myself; but then again I almost always static link fltk, so wouldn't expect to see DLL related issues anyway.



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