Just updated my Corona SDK from 2716 to 2742 today and OneSignal is not building anymore.
I am using Xcode 7.0.1.
I got report from other developer with the same issue.
Here is the console:
ERROR: Builder failed: ld: warning: object file (/Myapp.app/.build/plugin.OneSignal/libplugin\_OneSignal.a(GameThrive.o)) was built for newer iOS version (6.1) than being linked (6.0) ld: warning: object file (/Myapp.app/.build/plugin.OneSignal/libplugin\_OneSignal.a(OneSignalTrackIAP.o)) was built for newer iOS version (6.1) than being linked (6.0) ld: warning: object file (/Myapp.app/.build/plugin.OneSignal/libplugin\_OneSignal.a(OneSignalJailbreakDetection.o)) was built for newer iOS version (6.1) than being linked (6.0) ld: warning: object file (/Myapp.app/.build/plugin.OneSignal/libplugin\_OneSignal.a(OneSignalHTTPClient.o)) was built for newer iOS version (6.1) than being linked (6.0) ld: warning: object file (/Myapp.app/.build/plugin.OneSignal/libplugin\_OneSignal.a(OneSignalMobileProvision.o)) was built for newer iOS version (6.1) than being linked (6.0) ld: warning: object file (/Myapp.app/.build/plugin.OneSignal/libplugin\_OneSignal.a(OneSignalReachability.o)) was built for newer iOS version (6.1) than being linked (6.0) ld: warning: object file (/Myapp.app/.build/plugin.OneSignal/libplugin\_OneSignal.a(OneSignal.o)) was built for newer iOS version (6.1) than being linked (6.0) Undefined symbols for architecture armv7: "\_CTFontManagerRegisterFontsForURL", referenced from: Rtt::IPhoneFont::IPhoneFont(char const\*, float, NSString\*) in libtemplate.a(Rtt\_IPhoneFont.o) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation) Oct 20 05:27:12.453: BUILD ERROR: There was a problem linking the app.