Xcode 15: Undefined symbols: Linker command failed with exit code 1 (use -v to see invocation)

Question

upon upgrading to Xcode 15, my widget extension is causing this error: Undefined symbols: Linker command failed with exit code 1 (use -v to see invocation)

When pressing the error, nothing happens. It doesn't show me which symbols are undefined.

How should I fix this?

Answer 1

try adding -ld_classic to the linker options

from

https://developer.apple.com/forums/thread/731089

this worked in my case, It forces use of the old linker, the new linker is used by default in Xcode 15.

Addition info here..

https://developer.apple.com/forums/thread/715385