Build for android (IL2CPP) failed with "Unable to detect NDK version"

Build for android (with experimental IL2CPP) failed with

IL2CPP for android needs android NDK for compiling generated C++ sources but it seems that unity builder machines don't have it and this might be the reason for the build failure.

Although IL2CPP for android is still an experimental feature but it's nice to have it.

 

Oops important thing was missing. Unity builder machine means "Build machines provided by Unity Cloud Build (https://build.cloud.unity3d.com)"

 

Thanks for sharing future plan. I hope that it will arrive soon.

 

"Nearish future" appears to be still the future.. any progress here?

 

I gave it a shot, found the error message of the OP, googled and came to this forum entry

Build target is 5.4.0b17, Android with IL2CPP activated.

there's a suspicious error at the start of the log about a rubygems problem:

Code (csharp):

1.  
2. 1: Running Prebuild steps
3. 2: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/dependency.rb:296:in `to_specs': Could not find 'bvr' (>= 0) among 41 total gem(s) (Gem::LoadError)
4. 3: from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/dependency.rb:307:in `to_spec'
5. 4: from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_gem.rb:47:in `gem'
6. 5: from /usr/bin/bvr:22:in `<main>'
7. 6: ERROR: While executing gem ... (OptionParser::MissingArgument)
8. 7: missing argument: --version
9. 8: Building native extensions. This could take a while...
10.  

At the end of the log, there comes the error with the NDK:

Code (csharp):

1. 2367: [Unity] UnityEditor.Android.PostProcessAndroidPlayer:PostProcess(BuildTarget, String, String, String, String, String, String, BuildOptions, RuntimeClassRegistry)
2. 2368: [Unity] UnityEditor.Android.AndroidBuildPostprocessor:PostProcess(BuildPostProcessArgs)
3. 2369: [Unity] UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, BuildTarget, BuildOptions, Boolean)
4. 2370: [Unity] UnityEditor.CloudBuild.Builder:Build()
5. 2371: [Unity] UnityException: Unable to detect NDK version, please pick a different folder.
6. 2372: [Unity] at UnityEditor.Android.AndroidNdkRoot.VerifyNdkDir (System.String ndkPath) [0x00000] in <filename unknown>:0
7. 2373: [Unity] at UnityEditor.Android.AndroidNDKTools.GetInstance () [0x00000] in <filename unknown>:0
8. 2374: [Unity] at UnityEditor.Android.AndroidIl2CppClangCompiler..ctor (.TargetArchCompilerSettings[] targetArchitectures, System.String unityEngineVariation) [0x00000] in <filename unknown>:0
9. 2375: [Unity] at UnityEditor.Android.AndroidIl2CppPlatformProvider.CreateNativeCompiler () [0x00000] in <filename unknown>:0
10. 2376: [Unity] at UnityEditor.Android.PostProcessor.Tasks.RunIl2Cpp.PrepareIl2cppFiles (UnityEditor.Android.PostProcessor.PostProcessorContext context, UnityEditor.Android.AndroidIl2CppPlatformProvider provider) [0x00000] in <filename unknown>:0
11. 2377: [Unity] at UnityEditor.Android.PostProcessor.Tasks.RunIl2Cpp.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) [0x00000] in <filename unknown>:0
12. 2378: [Unity] at UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) [0x00000] in <filename unknown>:0
13. 2379: [Unity] at UnityEditor.Android.PostProcessAndroidPlayer.PostProcess (BuildTarget target, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry) [0x00000] in <filename unknown>:0
14. 2380: [Unity] at UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (BuildPostProcessArgs args) [0x00000] in <filename unknown>:0
15. 2381: [Unity] UnityEditor.BuildPipeline:BuildPlayerInternalNoCheck(String[], String, BuildTarget, BuildOptions, Boolean)
16. 2382: [Unity] UnityEditor.CloudBuild.Builder:Build()
17. 2383: [Unity] Error building Player: UnityException: Unable to detect NDK version, please pick a different folder.
18. 2384: [Unity] (Filename: Line: -1)
19. 2385: [Unity] Load scene 'Temp/__Backupscenes/0.backup' time: 0.031493 ms
20. 2386: [Unity] Unloading 23 Unused Serialized files (Serialized files now loaded: 0)
21. 2387: [Unity] System memory in use before: 89.9 MB.
22. 2388: [Unity] System memory in use after: 90.1 MB.
23. 2389: [Unity] Unloading 5 unused Assets to reduce memory usage. Loaded Objects now: 2836.
24. 2390: [Unity] Total: 13.210633 ms (FindLiveObjects: 0.290454 ms CreateObjectMapping: 0.056934 ms MarkObjects: 12.823046 ms DeleteObjects: 0.038838 ms)
25. 2391: [Unity] Unloading 14 Unused Serialized files (Serialized files now loaded: 0)
26. 2392: [Unity] System memory in use before: 98.7 MB.
27. 2393: [Unity] System memory in use after: 98.9 MB.
28. 2394: [Unity] Unloading 0 unused Assets to reduce memory usage. Loaded Objects now: 2849.
29. 2395: [Unity] Total: 11.146170 ms (FindLiveObjects: 0.267356 ms CreateObjectMapping: 0.022022 ms MarkObjects: 10.847215 ms DeleteObjects: 0.008495 ms)
30. 2396: [Unity] Ignoring '/UNITY_PATH/Unity/Unity-5_4_0b17/Unity.app/Contents/UnityExtensions/Unity/Advertisements/UnityEngine.Advertisements.dll' because we're compiling for Editor
31. 2397: [Unity] Ignoring '/UNITY_PATH/Unity/Unity-5_4_0b17/Unity.app/Contents/UnityExtensions/Unity/UnityAnalytics/UnityEngine.Analytics.dll' because we're compiling for Editor
32. 2398: [Unity] Ignoring '/UNITY_PATH/Unity/Unity-5_4_0b17/Unity.app/Contents/UnityExtensions/Unity/UnityPurchasing/UnityEngine.Purchasing.dll' because we're compiling for Editor
33. 2399: [Unity] Ignoring '/UNITY_PATH/Unity/Unity-5_4_0b17/Unity.app/Contents/UnityExtensions/Unity/Advertisements/UnityEngine.Advertisements.dll' because we're compiling for Editor
34. 2400: [Unity] Ignoring '/UNITY_PATH/Unity/Unity-5_4_0b17/Unity.app/Contents/UnityExtensions/Unity/UnityAnalytics/UnityEngine.Analytics.dll' because we're compiling for Editor
35. 2401: [Unity] Ignoring '/UNITY_PATH/Unity/Unity-5_4_0b17/Unity.app/Contents/UnityExtensions/Unity/UnityPurchasing/UnityEngine.Purchasing.dll' because we're compiling for Editor
36. 2402: [Unity] - starting compile Library/ScriptAssemblies/Assembly-CSharp.dll, for buildtarget 13
37. 2403: [Unity] Unloading 2 Unused Serialized files (Serialized files now loaded: 0)
38. 2404: [Unity] System memory in use before: 98.4 MB.
39. 2405: [Unity] System memory in use after: 98.6 MB.
40. 2406: [Unity] Unloading 2 unused Assets to reduce memory usage. Loaded Objects now: 2849.
41. 2407: [Unity] Total: 17.406790 ms (FindLiveObjects: 1.155344 ms CreateObjectMapping: 0.055562 ms MarkObjects: 16.149696 ms DeleteObjects: 0.044253 ms)
42. 2408: [Unity] *** Cancelled 'Build.Player.AndroidPlayer' in 90 seconds (90353 ms)
43. 2409: [Unity] Player export failed. Reason: 2 errors
44. 2410: [Unity] UnityEngine.DebugLogHandler:Internal_Log(LogType, String, Object)
45. 2411: [Unity] UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
46. 2412: [Unity] UnityEngine.Logger:Log(LogType, Object)
47. 2413: [Unity] UnityEngine.Debug:Log(Object)
48. 2414: [Unity] UnityEditor.CloudBuild.BuildLogger:Log(String, Object[])
49. 2415: [Unity] UnityEditor.CloudBuild.Builder:Build()
50. 2416: [Unity] Refresh: detecting if any assets need to be imported or removed ... Refresh: elapses 0.046931 seconds (Nothing changed)
51. 2417: [Unity] Refresh: detecting if any assets need to be imported or removed ... Refresh: elapses 0.048067 seconds (Nothing changed)
52. 2418: [Unity] Internal: Possible leak. All textures should be removed from IdMap when destructed using RemoveTexture(TextureID texid).
53. 2419: [Unity] Cleanup mono
54. 2420: [Unity] Checking for leaked weakptr:
55. 2421: [Unity] Found no leaked weakptrs.
56. 2422: [Unity] ##unity-automation:{"messageType":"MemoryLeaks","allocatedMemory":7808,"memoryLabels":[{"Default":96},{"Thread":48},{"Manager":216},{"GfxDevice":192},{"Physics":8},{"String":444},{"DynamicArray":48},{"ScriptManager":1800},{"VR":2912},{"EditorUtility":280},{"AssetImporter":24},{"RestService":64},{"License":972},{"UnityConnect":704}]}
57. 2423: ! Unity player export failed!
58. 2424: ! build of 'default-android' failed. compile failed
59. 2425: Publishing build 92 of bananaa/yinyang for target 'default-android'...
60. 2426: publishing finished successfully.
61. 2427: Build step 'Execute shell' marked build as failure
62. 2428: postbuildstatus finished successfully.
63. 2429: Finished: FAILURE
64.  

Any ideas?

 

@Ryanc_unity Once you have manually installed the NDK, where do you find it, so you can browse to it and set the path in Unity? I installed it, but it is not to be found anywhere, even in my Library files...

 

@Ryanc_unity Local install... I am just getting started with Unity, so I would like to configure SDK+JDK+NDK for development. I have sorted the first two, but I have no clue how to specify the NDK path.

 

simply remove windows x86_64 from parent folder name and then select folder inside parent folder for NDK

 

This should be F***ing written on Unity first page, i downloaded some 6 NDKS version, searched and worked for almost 2 or 3 days and you know what this solved it, thank you!

 

I solved the problem with this video

 

I'm locking this thread due to its age and since there are two quite separate discussions here:

If you're experiencing issues where Cloud Builds fail with "Unable to detect NDK version" then please create a new thread in this forum since the issue you are experiencing is definitely not going to be the same thing as this issue from 2015.

If you're experiencing issues when attempting to build Android IL2CPP locally in the editor then please read or post in the Android Platform forum since you will get a quicker response there from users who are experienced with Android builds, and this brings it directly to the attention of the Android platform developers.