how xcodebuild to pass WARNING_CFLAGS to buildsettings

Question

xcodebuild -project MyProj.xcodeproj -scheme MyLib WARNING_CFLAGS='-Wno-shorten-64-to-32

It seems like not workable...

Answer 1

1. Go to Build Phases of your Xcode project.
2. In compile sources, select all files you want to compress the error for
3. Add -Wno-shorten-64-to-32 to the "Compiler Flags" column