Qt and subsurface for Android

[Dirk Hohndel]

> On Jan 2, 2017, at 3:20 AM, Willem Ferguson <willemferguson at zoology.up.ac.za> wrote:
> 
> I am trying to build subsurface for execution on Android in order to test the FTDI support. However I get the following error:
> 
> ~/src$ export SUBSURFACE_DESKTOP=ON
> ~/src$ printenv | grep "SUBSURFACE_DESKTOP"
> SUBSURFACE_DESKTOP=ON
> ~/src$ bash subsurface/packaging/android/build.sh
> ~/src/subsurface ~/src
> ~/src
> Cannot find Qt 5.7, 5.6 or 5.5 under /home/willem/src/subsurface/../Qt
> 
> This should not be a surprise, because I work with a new install of Ubuntu and I have not explicitly installed Qt yet. However, the Linux desktop version of Subsurface builds perfectly on this machine, so some Qt must exist. Is this correct? How can I find the version of the installed Qt?
> 
> Upon closer inspection, it looks like /scripts/build.sh expects either Qt 5.5 or 5.6, as opposed to the Android build.sh that expects 5.5, 5.6 or 5.7.
> 
> Where would the optimal place be to install it into? If I install Qt, I would expect to install 5.7.  What does "/home/willem/src/subsurface/../Qt" mean? Qt within the subsurface folder? Cannot be.
> 
> How can I point the build.sh to an appropriate location?

You need to have a version of Qt that contains the Android bits installed. Something like this
http://download.qt.io/official_releases/qt/5.7/5.7.1/qt-opensource-linux-x64-android-5.7.1.run

Install this wherever you want - and then have a link named ~/src/Qt that points to it.
So let's assume that you are installing the package above in ~/Qt5.7.1 (which I think
is the default location), then simply do
cd ~/src
ln -s ~/Qt5.7.1 Qt

Now you should be able to run

export SUBSURFACE_DESKTOP=ON
bash subsurface/packaging/android/build.sh

/D