ld: library not found for -lstdc++.6
After updating Xcode Version to 10.0 beta start getting "ld: library not found for -lstdc++.6" error. same code working fine in Xcode 9.2
Also updated macOS to 10.13.5
Answer
You'll have this issue when targeting iOS App. It's stated in the Release note:
Deprecation Notices:
Building with libstdc++ was deprecated with Xcode 8 and is not supported in Xcode 10 when targeting iOS. C++ projects must now migrate to libc++ and are recommended to set a deployment target of iOS 7 or later. Besides changing the C++ Standard Library build setting, developers should audit hard-coded linker flags and target dependencies to remove references to libstdc++ (including -lstdc++, -lstdc++.6.0.9, libstdc++.6.0.9.tbd, and libstdc++.6.0.9.dylib). Project dependencies such as static archives that were built against libstdc++ will also need to be rebuilt against libc++. (40885260)
Source: Release Notes of XCode Beta 2
Side Note:
You need to be logged to access the page.
Link might break in next beta release (URLs change), but it's in the part Developers/Download
XCode 10 being officially released with its release note, it's still as such:
Building with libstdc++ was deprecated with Xcode 8 and is not supported in Xcode 10 when targeting iOS. C++ projects must now migrate to libc++ and are recommended to set a deployment target of macOS 10.9 or later, or iOS 7 or later. Besides changing the C++ Standard Library build setting, developers should audit hard-coded linker flags and target dependencies to remove references to libstdc++ (including -lstdc++, -lstdc++.6.0.9, libstdc++.6.0.9.tbd, and libstdc++.6.0.9.dylib). Project dependencies such as static archives that were built against libstdc++ will also need to be rebuilt against libc++. (40885260)