To be honest..I'm not sure. I'm not super plugged-in to the jailbreak or iOS development community anymore. Happy to keep this issue open though in case anyone else has some suggestions and/or wants to propose a fix.

Yes, you need an older SDK.

1. Grab the proper SDK from https://github.com/xybp888/iOS-SDKs (github will probably require to download all of them, have fun).

2. Modify the Makefile so that the SDK points to the proper SDK folder (such as iPhoneOS14.5.sdk).

I failed after that in warnings about needing to unlock my phone, which looks like a different open issue, so I think this is the fix but I'm not completely sure.

Fixed this by downloading Theos SDKs - https://github.com/theos/sdks

and using the below in top of Makefile

GCC_BIN=`xcrun --sdk iphoneos --find gcc`
SDK=$(THEOS)/sdks/iPhoneOS12.4.sdk
ARCH_FLAGS=-arch arm64

If anyone wants to open up a PR to script/automate the building using the best supported SDK that would be awesome.

I got this error with 1.2.0 on iOS 15.7.

I managed to get it working by using version 1.1.0 instead.

Thanks to everyone who worked on this! Truly awesome stuff.

Binary: https://github.com/user-attachments/files/18758838/keychain_dumper_THIREUS-1.2.0.zip