Xcode LLVM 6.1 Error

I’m trying to port my game to iOS from Unity, but I’m running into this build error in xcode (third on the left):

I’ve tried googling but haven’t found a solution that works. Does anyone here have an idea of how to fix it? It’s driving me crazy. I’m using the latest version of Unity 4.6 and I have the deployment target set to 7.0 in Xcode 6.

From the build log I see that the deployment target is set to 4.3 somewhere. Please re-check all your configurations for that setting.

Same problem here with all of our builds.
Looks like we change the xCode compiler - Build settings - Apple LLVM Code Generation - Optimization level - Release - None [-O0] - it will work.