[Interest] how do I tell cmake that I need libQt5PositioningQuick.so

[Thiago Macieira]

On Tuesday, 10 July 2018 08:28:29 PDT Dirk Hohndel wrote:
> > My wild guess: a new plugin that gets deployed by macdeployqt, which links
> > to this library, but isn't added by macdeployqt.
> 
> What happens is that when Subsurface (or Subsurface-mobile) starts, loading
> the Map fails (that's QML in both desktop and mobile app). And when you
> look at the error messages, it's because a QML component isn't loaded
> because it needs this library.

Yup, this fits with my theory.

There's a QML import (QtPositioning) that loads the "declarative_positioning" 
plugin. That plugin links to QtPositioningQuick:

$ eu-readelf -d /usr/lib64/qt5/qml/QtPositioning/libdeclarative_positioning.so 
| grep NEEDED 
  NEEDED            Shared library: [libQt5PositioningQuick.so.5]
  NEEDED            Shared library: [libQt5Positioning.so.5]
  NEEDED            Shared library: [libQt5Quick.so.5]
  NEEDED            Shared library: [libQt5Qml.so.5]
  NEEDED            Shared library: [libQt5Core.so.5]
  NEEDED            Shared library: [libstdc++.so.6]
  NEEDED            Shared library: [libc.so.6]
(This is Linux, but same for Mac)

However, this plugin is not new. It's been there since Qt 5.2. So the 
regression appears to be in the macdeployqt tool.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center