一个解决办法就是把之前版本的libstdc++copy到本版本、不过每次更新都需要重新copy一次、前提是得有旧版本、没有的话就去git上下载吧

需要copy的目录为

Xcode⁩ ▸ ⁨Contents⁩ ▸ ⁨Developer⁩ ▸ ⁨Platforms⁩ ▸ ⁨iPhoneOS.platform⁩ ▸ ⁨Developer⁩ ▸ ⁨Library⁩ ▸ ⁨CoreSimulator⁩ ▸ ⁨Profiles⁩ ▸ ⁨Runtimes⁩ ▸ ⁨iOS.simruntime⁩ ▸ ⁨Contents⁩ ▸ ⁨Resources⁩ ▸ ⁨RuntimeRoot⁩ ▸ ⁨usr⁩ ▸ ⁨lib⁩

⁨Xcode⁩ ▸ ⁨Contents⁩ ▸ ⁨Developer⁩ ▸ ⁨Platforms⁩ ▸ ⁨iPhoneOS.platform⁩ ▸ ⁨Developer⁩ ▸ ⁨SDKs⁩ ▸ ⁨iPhoneOS.sdk⁩ ▸ ⁨usr⁩ ▸ ⁨lib⁩

⁨Xcode⁩ ▸ ⁨Contents⁩ ▸ ⁨Developer⁩ ▸ ⁨Platforms⁩ ▸ ⁨iPhoneSimulator.platform⁩ ▸ ⁨Developer⁩ ▸ ⁨SDKs⁩ ▸ ⁨iPhoneSimulator.sdk⁩ ▸ ⁨usr⁩ ▸ ⁨lib⁩

如果需要的话这个文件夹也添加进去

⁨Xcode⁩ ▸ ⁨Contents⁩ ▸ ⁨Developer⁩ ▸ ⁨Platforms⁩ ▸ ⁨MacOSX.platform⁩ ▸ ⁨Developer⁩ ▸ ⁨SDKs⁩ ▸ ⁨MacOSX.sdk⁩ ▸ ⁨usr⁩ ▸ ⁨lib⁩

如果是自己写的话、最好把库换成libc++