Xcode10：library not found for -lstdc++.6.0.9 临时解决
1、https://pan.baidu.com/s/1IkbZb6qaxgvghP1HEFQa6w?errno=0&errmsg=Auth%20Login%20Sucess&&bduss=&ssnerror=0&traceid=
下载libstdc++.6.0.9.tbd.zip压缩包
2、在终端输入以下命令打开lib库目录
open /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib
3、把刚刚下载的zip文件解压，获取到 libstdc++.6.0.9.tbd 文件，扔进去，重启Xcode