building to iOS 5.1

[Ben Rubinstein]

I have an iPad 1 which I could save from the e-wasteheap if I could build a 
simple app for it.

My current install of LiveCode will only build back to iOS 8 (enough to do 
something useful for my iPad 2!).

The splendid
https://livecode.com/docs/9-0-4/faq/faq/#what-version-of-livecode-works-with-which-version-of-xcode-ios

only goes back to iOS 6.0; but of course at one time it was possible to use 
LiveCode to build apps for iOS 5.

I'm not sure what the limiting factors are: do I need earlier version of 
LiveCode, of Xcode, of MacOS, or all three?

To save me endless miserable experimentation, does anyone know the answer? Is 
anyone else currently set up to do this?

TIA,

Ben