[Interest] iOS libpng conflicts with another lib

[coroberti .]

On Tue, Feb 6, 2018 at 12:27 PM, maitai <maitai at virtual-winds.org> wrote:
> Hello,
>
> I have an external lib build statically into my qt app (5.9.4,
> widget-based). That lib can optionally support internally png images. If I
> activate this, there is no problems in other platforms (I tested Android,
> Windows, Linux, Raspberry, MacOS), but on iOS as soon as I try to open a png
> image with a QPixmap or a QImage it crashes. If I compile my external lib
> without png support no more crash.
>
> So it appears that libpng from Qt and the one from my lib are conflicting,
> but only on iOS.
>
> Any idea why this occurs on iOS and what I could do to avoid the crash? I
> badly need png support in both qt and the external lib.
>
> Thanks
> Philippe

Are there any clues you can get from XCode debugger of from crash-report of iOS
like where it happens and what is corrupted?

Kind regards,
Robert