After updating to Xcode 16.3, getting the error - Symbol not found: ___cxa_current_primary_exception

Question

Created Apr ’25

Replies 5

Boosts 4

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It didn't happen with Xcode 16.2 that I used before, but after updating to 16.3, when I build the app, the following error is output to the console and the app doesn't run.

dyld[2150]: Symbol not found: ___cxa_current_primary_exception
  Referenced from: <6B00A4F2-B208-3FDB-BA38-B7095AF0034A> /private/var/containers/Bundle/Application/B590DB18-9C66-4C9E-8330-104943419E60/Mubeat DEV.app/Mubeat DEV.debug.dylib
  Expected in:     <7F51CB08-A0CA-386E-BB62-4B8BFB0CED9F> /usr/lib/libc++.1.dylib
Symbol not found: ___cxa_current_primary_exception
  Referenced from: <6B00A4F2-B208-3FDB-BA38-B7095AF0034A> /private/var/containers/Bundle/Application/B590DB18-9C66-4C9E-8330-104943419E60/Mubeat DEV.app/Mubeat DEV.debug.dylib
  Expected in:     <7F51CB08-A0CA-386E-BB62-4B8BFB0CED9F> /usr/lib/libc++.1.dylib
dyld config: DYLD_LIBRARY_PATH=/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/usr/lib/libBacktraceRecording.dylib:/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/Developer/Library/PrivateFrameworks/DTDDISupport.framework/libViewDebuggerSupport.dylib

After looking for another solution, I found a way to remove the -Objc option in Other Linker Flags, but this method only works on iOS 18.4 and doesn't work on other versions.

Is there another solution?

Boost

Answer 1

DTS Engineer OP

Apple

Apr ’25

I believe this is a bug, may I ask you to file a bug?

Once you open the bug report, please post the FB number here for my reference.

If you have any questions about filing a bug report, take a look at Bug Reporting: How and Why?

Albert Pascual   Worldwide Developer Relations.

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Answer 2

koogawa OP

Apr ’25

Xcode 16.4 beta 1 still has issue with Symbol not found: ___cxa_current_primary_exception

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Answer 3

edward930903 OP

Apr ’25

Symbol not found: ___cxa_current_primary_exception Referenced from: <6A570AA3-0A49-31FB-81DA-81E88B14C7CA> /private/var/containers/Bundle/Application/93D9A1A1-4FC2-414B-AD9C-F66E12D02B01/Runner.app/Runner.debug.dylib Expected in: <09BDEE26-E6C3-3545-8CC9-6F215DEAFB43> /usr/lib/libc++.1.dylib dyld config: DYLD_LIBRARY_PATH=/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/usr/lib/libLogRedirect.dylib:/usr/lib/libBacktraceRecording.dylib:/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/usr/lib/libViewDebuggerSupport.dylib

I also encountered the same problem, how to solve it，my xcode version is 16.3

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Answer 4

Joshua5757 OP

3w

I encountered the same situation, and I found the reason.

the reason is symbol definition change in libc++.dylib. in iOS 18.4 above, symbols in libc++abi.dylib are defined as indirect in libc++.dylib. so when building apps, these symbols are marked as defined in libc++.dyilb. but in older OSes lower than iOS 18.4, these are marked as undefined in libc++.dylib. so dyld would meet bad situation.

the workaround about this is forcing link order, preceding libc++abi.dylib over libc++.dylib.

I filed feedback about this, ticket number is FB17734818

1

Answer 5

hs7 OP

2w

the workaround about this is forcing link order, preceding libc++abi.dylib over libc++.dylib.

Thanks, After adding the following settings to Other Linker Flags, the app no longer crashes on Xcode 16.4 with iOS versions earlier than 18.4 — at least for now:

-Wl,-force_load,$(SDKROOT)/usr/lib/libc++abi.tbd
-Wl,-weak_library,$(SDKROOT)/usr/lib/libc++.tbd
-Wl,-weak_library,$(SDKROOT)/usr/lib/libc++.1.tbd

I hope this issue will be properly addressed in the next Xcode update.

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