[cmake-developers] iOS friendly CMake

[Gregor Jasny]

Hi,

I created a CMake branch where I attempt to provide an easy way to 
configure CMake projects for iOS (and all other Xcode SDKs).

All you need to build for iOS is:

cmake -DCMAKE_SYSTEM_NAME=Darwin -DCMAKE_OSX_SYSROOT=iphoneos -GXcode .

In case you build code that must be code signed also add your 
development team: -DCMAKE_XCODE_ATTRIBUTE_DEVELOPMENT_TEAM=ABCDEFG

The merge request is here:
https://gitlab.kitware.com/cmake/cmake/merge_requests/1664

Please give it a try and add any comments you have to the merge 
requests. I only tested it with Xcode 9 on High Sierra so far.

Thanks,
Gregor