Errors when building with Xcode 7, Unity 5.2.3f1, iOS 9.1 base SDK

Question

I'm trying to build a sample Unity app with Xcode 7, Unity 5.2.3f1, iOS 9.1 base SDK, but get these compile errors when trying to run the app in Xcode. I already set scripting backend = IL2CPP, Architecture = Universal, but it did not help.

Undefined symbols for architecture x86_64: "_CloseZStream", referenced from: _DeflateStream_Dispose_m2_129 in Bulk_System_0.o _DeflateStream_CloseZStream_m2_153 in Bulk_System_0.o (maybe you meant: _DeflateStream_CloseZStream_m2_153) "_CreateZStream", referenced from: _DeflateStream_CreateZStream_m2_152 in Bulk_System_0.o (maybe you meant: _DeflateStream_CreateZStream_m2_152) "_Flush", referenced from: _DeflateStream_Flush_m2_139 in Bulk_System_0.o _DeflateStream_Flush_m2_154 in Bulk_System_0.o (maybe you meant: _FtpDataStream_Flush_m2_546, _UnmanagedMemoryStream_Flush_m1_2462 , _NullStream_Flush_m1_2305 , _MemoryStream_Flush_m1_2229 , _FileStream_Flush_m1_2186 , _FileStream_FlushBuffer_m1_2191 , _FileStream_FlushBufferIfDirty_m1_2193 , _FileStream_FlushBuffer_m1_2192 , _XmlInputStream_Flush_m7_567 , _WebConnectionStream_Flush_m2_928 , _SynchronizedWriter_Flush_m1_2427 , _NetworkStream_Flush_m2_227 , _GZipStream_Flush_m2_162 , _DeflateStream_Flush_m2_139 , _StreamWriter_FlushBytes_m1_2354 , _DeflateStream_Flush_m2_154 , _TlsStream_Flush_m3_798 , _SslStream_Flush_m2_202 , _TextWriter_Flush_m1_2415 , _StreamWriter_Flush_m1_2353 , _SslStreamBase_Flush_m3_726 , _UnexceptionalStreamWriter_Flush_m1_2447 ) "_ReadZStream", referenced from: _DeflateStream_ReadInternal_m2_134 in Bulk_System_0.o _DeflateStream_ReadZStream_m2_155 in Bulk_System_0.o (maybe you meant: _DeflateStream_ReadZStream_m2_155) "_UnityADBannerViewFailedToLoad", referenced from: -[UnityADBanner bannerView:didFailToReceiveAdWithError:] in iAD.o "_UnityADBannerViewWasClicked", referenced from: -[UnityADBanner bannerViewActionDidFinish:] in iAD.o "_UnityADBannerViewWasLoaded", referenced from: -[UnityADBanner bannerViewDidLoadAd:] in iAD.o "_UnityADInterstitialADWasLoaded", referenced from: -[UnityInterstitialAd interstitialAdDidLoad:] in iAD.o "_UnityBindFramebuffer", referenced from: _CreateSystemRenderingSurfaceGLES in GlesHelper.o _DestroySystemRenderingSurfaceGLES in GlesHelper.o _CreateRenderingSurfaceGLES in GlesHelper.o _DestroyRenderingSurfaceGLES in GlesHelper.o _CreateSharedDepthbufferGLES in GlesHelper.o _CreateField in Minesweeper _PreparePresentGLES in GlesHelper.o "_UnityBlitToBackbuffer", referenced from: _PreparePresentGLES in GlesHelper.o "_UnityCaptureScreenshot", referenced from: _PreparePresentGLES in GlesHelper.o

Answer 1

I solved this issue by checking "Symlink Unity Library" in Build Settings and made sure the build is for device, not simulator.

Answer 2

I had this error because my iOS device changed from an iphone 5 to a generic iOs device I assume because the cord wasn't high quality and it lost connection.

If XCode loses connection it tries to build for a generic device.

I just reconnected the phone and rebuilt fixed my issue.