ios - ld : library not found for -lstdc++. 6

Question

将 Xcode 版本更新到 10.0 beta 后，开始出现“ld: library not found for -lstdc++.6”错误。相同的代码在 Xcode 9.2 中运行良好

还将 macOS 更新到 10.13.5

Answer 1

针对 iOS 应用程序时，您会遇到此问题。它在发行说明中说明:

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)

来源:Release Notes of XCode Beta 2

旁注:
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链接可能会在下一个测试版中中断(URL 更改)，但它位于 Developers/Download 部分

XCode 10 正式发布 release note ，它仍然是这样的:

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)