IOS support about qt

[therecipe]

Hey

I will look into this.

[therecipe]

Okay, I added iOS and iOS-Simulator support 54bd9aa

Just install this qt version with iOS support and run github.com/therecipe/qt/setup.sh ios and github.com/therecipe/qt/setup.sh ios-simulator

But there are some limitations:

Currently only arm64 devices are supported (iPhone 5s and newer), because the created binaries are to big for armv7. (Maybe this will change with go 1.7)
Here is a great comparison about which device supports which arm version.

Another limitation is, that the qt library can only be statically linked by now.
Which means you probably have to provide the created libgo.a to your end user or buy the commercial version of qt. (Maybe this will change with qt 5.8 - link)

And there could be the need to raise the minimum supported iOS version from 6.1 to 8.0, after the first two limitations are solved.

[therecipe]

If you use the current go tip or go 1.7 you will get fat binaries with armv7 and arm64 support.
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