libstdc++.6.dylib

[MasterYong]

ld: library not found for -lstdc++.6.0.9

[FawadMahmood]

Same issue with me as well.

[LingYanSi]

libstdc++ was deprecated about 5 years ago (note that it hasn't been available in tvOS nor watchOS). Please switch to using libc++.

https://developer.apple.com/forums/thread/103732