Xcode stuck / hangs when compiling source files for Unity project

Question

When building my Unity project for iOS in Xcode, Xcode just stays stuck at "Compiling 286 of 286 source files" forever. During this time, the memory usage keeps growing until the system crashes.

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I'm using Unity 5.4.2p4 and Xcode 8.1. I don't know how to test on iOS now. Any ideas? Thanks!

This is the task that never completes running:

 Showing All Messages
 CompileC /Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/Objects-normal/armv7/Bulk_Assembly-CSharp-firstpass_2.o Classes/Native/Bulk_Assembly-CSharp-firstpass_2.cpp normal armv7 c++ com.apple.compilers.llvm.clang.1_0.compiler
     cd "/Users/Chetan/Dropbox/Development/audiosky-build/iOS/Audio Sky"
     export LANG=en_US.US-ASCII
     export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
     /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x c++ -arch armv7 -fmessage-length=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -std=c++11 -stdlib=libc++ -gmodules -Wno-trigraphs -fno-rtti -fpascal-strings -Os -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-non-virtual-dtor -Wno-overloaded-virtual -Wno-exit-time-destructors -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-bool-conversion -Wno-enum-conversion -Wno-shorten-64-to-32 -Wno-newline-eof -Wno-c++11-extensions -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS10.1.sdk -fstrict-aliasing -Wdeprecated-declarations -Winvalid-offsetof -miphoneos-version-min=7.0 -g -fvisibility=hidden -fvisibility-inlines-hidden -Wno-sign-conversion -Wno-infinite-recursion -Wno-move -fembed-bitcode-marker -iquote /Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/audioky-generated-files.hmap -I/Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/audioky-own-target-headers.hmap -I/Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/audioky-all-target-headers.hmap -iquote /Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/audioky-project-headers.hmap -I/Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Products/Release-iphoneos/include -I/Users/Chetan/Dropbox/Development/audiosky-build/iOS/Audio\ Sky/Classes -I/Users/Chetan/Dropbox/Development/audiosky-build/iOS/Audio\ Sky -I/Users/Chetan/Dropbox/Development/audiosky-build/iOS/Audio\ Sky/Classes/Native -I/Users/Chetan/Dropbox/Development/audiosky-build/iOS/Audio\ Sky/Libraries/bdwgc/include -I/Users/Chetan/Dropbox/Development/audiosky-build/iOS/Audio\ Sky/Libraries/libil2cpp/include -I/Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/DerivedSources/armv7 -I/Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/DerivedSources -F/Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Products/Release-iphoneos -DINIT_SCRIPTING_BACKEND=1 -fno-strict-overflow -include /Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/PrecompiledHeaders/Prefix-diondljbljkooaghkektdhbqamzg/Prefix.pch -MMD -MT dependencies -MF /Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/Objects-normal/armv7/Bulk_Assembly-CSharp-firstpass_2.d --serialize-diagnostics /Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/Objects-normal/armv7/Bulk_Assembly-CSharp-firstpass_2.dia -c /Users/Chetan/Dropbox/Development/audiosky-build/iOS/Audio\ Sky/Classes/Native/Bulk_Assembly-CSharp-firstpass_2.cpp -o /Users/Chetan/Library/Developer/Xcode/DerivedData/Unity-iPhone-bpzgklgpqhefexbztpigmjvnyunb/Build/Intermediates/Unity-iPhone.build/Release-iphoneos/Unity-iPhone.build/Objects-normal/armv7/Bulk_Assembly-CSharp-firstpass_2.o

Answer 1

Best Answer

Answer by chetan51 · Dec 08, 2016 at 06:14 AM

I narrowed it down to the ProceduralToolkit Unity library. Once I removed that from my Unity project, it started building in Xcode again.

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f77hacker · Dec 08, 2016 at 06:25 AM 0

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did you get past the new code signing ?

chetan51 f77hacker · Dec 08, 2016 at 06:26 AM 0

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Yes, I did.

playbatu · Jan 11, 2017 at 09:48 AM 1

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You sir, you are the real mvp! I want to kiss you very hard in a non homo way!

p_tah · Mar 06, 2017 at 03:56 PM 0

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how did you narrow it down to the ProceduralToolkit library? I'm pulling my hair out with this (same issue but not using ProceduralToolkit)...any clue as to how you did it would be awesome.

chetan51 · Mar 07, 2017 at 10:30 PM 2

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I created a new, empty project, and added assets to it from my project until it exhibited the same symptoms. I used binary search to speed up the search time. Good luck!

p_tah chetan51 · Apr 13, 2017 at 11:16 AM 0

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Well it took forever to isolate each library since our project has deeply integrated quite a few 3rd party tools over the years...but in the end it was an outdated UnitySerializer library (which is no longer a supported tool) that was the culprit. I simply ripped out the package, installed the much more robust Newtonsoft json.net library from the asset store and converted the dependencies. Nothing to it :|

So in the end, since there are no obvious flags, errors or indicators pointing in a particular direction, yours seems the best solution unfortunately.

Syomus · Apr 13, 2017 at 10:05 AM 1

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Hello, developer of ProceduralToolkit here. The problem was in IL2CPP compiler, it couldn't compile a very large array initializer. This problem is fixed in the latest version of toolkit, no idea when there will be a patch from Unity.

Answer 2

Answer by defic · Feb 02, 2018 at 11:44 AM

With XCode 7.3.1 everything works fine, but on XCode 8 and 9, the same problem occurs. We are not using ProceduralToolKit. We are using Unity 5.5

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Answer 3

Answer by GroznyBear · Sep 21, 2018 at 01:35 PM

try build your xcode project using xcodebuild command-line tool

 > cd <your-project-directory>
 > xcodebuild

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Answer 4

Answer by f77hacker · Dec 08, 2016 at 02:17 AM

join the crowd

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Answer 5

Answer by p_tah · Mar 04, 2017 at 04:31 AM

Wondering if anyone else has had this issue and/or found an alternative solution? I have pretty much the same symptoms...project compiles forever while the memory usage increases over time

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I thought it was due to a high volume of 'Unused variable' warnings I am now getting after updating to xCode 8.2.1 but apparently they can be safely ignored (although i'm not sure why they're suddenly appearing). My project is pretty huge so while process of elimination is possible...it's a really bad idea. How do I properly debug the compiler process?

screen-shot-2017-03-03-at-32527-pm.png (499.3 kB)

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JokerDen · Oct 17, 2018 at 11:35 AM 0

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Same here. I still can't find the cause of problem with similar symptoms.

Xcode stuck / hangs when compiling source files for Unity project

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