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Created attachment 22643 [details]
Disabled option marked in screenshot
Could not enable the options "Use the LLVM optimizing compiler" and "Use Thumb-2 instruction set for ARMv7 and ARMv7s" from Visual Studio/Xamarin studio after migrating Xamarin 4.5, this options are disabled in IDE. If i add properties <MtouchUseLlvm> and <MtouchUseThumb> as true manually in .csproj file, the option is checked in IDE but still not enabled.
Please provide your input on how to use these properties correctly? why these are not enabled in Xamarin 4.5?.
Similarly when i "enable concurrent garbage collector" on IDE, added "<MtouchEnableSGenConc>" instead "<MtouchUseSGen>" in .csproj file. Which is correct property?.
Xamarin 220.127.116.113 (c871575)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 18.104.22.168 (448f54f)
Visual Studio extension to enable development for Xamarin.Android.
Xamarin.iOS 10.10.0.30 (30b6e87)
Visual Studio extension to enable development for Xamarin.iOS.
Please update me resolution.
Adding @rolf in cc since he has more information about this feature.
LLVM is not available for debug builds (because debugging doesn't work with LLVM).
If you select a release build, you can enable LLVM.
To use the concurrent garbage collector, just check the checkbox in the IDE.
But appstore and ad-hoc build can't enable llvm too
@Yue, make sure "Enable debugging" is not selected in the "iOS Debug" project options.