The print support module was disabled for the initial port of Qt
for iOS due to the lack of a native print backend and native
print dialogs, as we have on macOS.
However, even lacking these we should be able to offer the print
to PDF feature, with widget based print dialogs. We can do so
by opting in to the generic Unix print dialogs and backends,
as these do not have a hard dependency on CUPS.
Longer term we should adopt UIPrintInteractionController,
UIPrinterPickerController, and UIPrinter, but that's a bigger
task.
[ChangeLog[iOS] The Qt Print Support module is now enabled,
allowing printing to PDF. Printing to system provided printers
are not yet supported.
Fixes: QTBUG-125581
Change-Id: I5bc143e47c7277b3cea52760672ac4d0c8a7a898
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
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