问题
I am trying to test my apps for iOS 12. I have a iPad only app that works fine under Xcode 9. When I try to compile it for the simulator with Xcode 10 GM, the following warning appears:
URGENT: building for iOS Simulator simulator, but linking against dylib (/usr/lib/libstdc++.6.0.9.dylib) built for macOS. Note: This will be an error in the future
It will build, but when running it crashes with the following message:
dyld: lazy symbol binding failed: can't resolve symbol ___cxa_guard_acquire in /Users/.... /.... xxx.app because dependent dylib #1 could not be loaded.
I haven't done anything, it happened on the first try.
Any ideas?
回答1:
removed '/usr/lib/libstdc++.6.0.9.dylib' from the 'OTHER_LDFLAGS', seems to be fine again.
回答2:
libstc is removed in iOS 12 and was first deprecated in Xcode 10. You can however manually add this library in Simulator or update your dependency to use libc++.
Refer this link for manually adding these libraries - libstdc
来源：https://stackoverflow.com/questions/52333547/xcode-10-gm-libstdc-error-cant-run-on-simulator