library not found for -lstdc++.6.0.9
真机
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/
模拟器
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/
Multiple commands produce'/Users/user/Library/Developer/Xcode/DerivedData...
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方法1
xcode 10 默认是新的编译模式，选择File > Workspace Settings > Build System > Legacy Build System.，改变为之前的编译模式Legacy Build system。
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方法2
Open target -> Build phase > Copy Bundle Resource 删除output files 中的脚本，如果存在 info.plist 也一起删除。
delete_output.png