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In my Unity project I wanna use Google Mobile Ads and when I build it for Xcode and try to launch on a device, I get the next error.

This is what I'm getting. ld: warning: arm64 function not 4-byte aligned: _unwind_tester from /path_to_my_project/Libraries/libiPhone-lib.a(unwind_test_arm64.o). Undefined symbols for architecture arm64:.

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Alexander
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  • Have you tried this [solution](https://stackoverflow.com/questions/19213782/undefined-symbols-for-architecture-arm64/28877558) that was already posted on stack overflow. – lacefarin Oct 16 '19 at 13:49

2 Answers2

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I had struggled with this issue too and turns out my problem was because my iPhone IOS version didn't match with the setting in the Xcode.

KanG98
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had a similar issue with some of the latest versions of xcode, i solved it by doing the following:

  • Install Xcode 9.3.1 (probably other older version will work as well)

  • Go to /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib in the xcode 9.3.1 installation

  • copy the libc++ and libstdc++ libraries (there might be some other libraries im missing here, i did this a while ago) over to the same place in your current xcode installation and restart the current xcode and try to build again.

hope this helps!

GPK42
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