dyld: Symbol not found: _clock_gettime

When building using

OSX 10.12.6
XCode 8.3.3
Ruby 2.3.4 (or 1.9.3)
and Master branch of rhodes

on a device running iOS 9.3.5 I get the following error in the iOS crash logs

I have been able to replicate this on iOS simulators as well.

iPhone6s Simulator running iOS 9.3 fails but iPhone7s simulator running 10.2/10.3 works


Jul 26 12:17:16 Davids-iPhone rhorunner[583] <Notice>: dyld: lazy symbol binding failed: Symbol not found: _clock_gettime

Referenced from: /var/containers/Bundle/Application/CFAB70B1-A557-4CBA-89A6-4B91AB32D24A/HerdData.app/rhorunner

Expected in: dyld shared cache

Jul 26 12:17:16 Davids-iPhone rhorunner[583] <Notice>: dyld: Symbol not found: _clock_gettime

Referenced from: /var/containers/Bundle/Application/CFAB70B1-A557-4CBA-89A6-4B91AB32D24A/HerdData.app/rhorunner

Expected in: dyld shared cache

Jul 26 12:17:16 Davids-iPhone com.apple.xpc.launchd[1] (UIKitApplication:au.com.datagene.herddataapp[0xdc79][583]) <Notice>: Service exited due to signal: Trace/BPT trap: 5

Jul 26 12:17:17 Davids-iPhone SpringBoard[48] <Warning>: Application 'UIKitApplication:au.com.datagene.herddataapp[0xdc79]' crashed.

Jul 26 12:17:17 Davids-iPhone UserEventAgent[23] <Warning>: 2535750755087: id=au.com.datagene.herddataapp pid=583, state=0

anyone have any ideas how I can get my app to run on devices < iOS10?