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Old 02-09-2018, 08:47 PM   #2
kovidgoyal
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You are mixing new and old Qt versions. See for example:

../../../src/calibre/gui2/pictureflow/pictureflow.cpp:1497:13: error: ‘class QImage’ has no member named ‘setDevicePixelRatio’

IIRC setDevicePixelRatio was added to QImage as of version 5.6 or 5.5
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