This field can be used to pass additional arguments to clang scan-build. The arguments will appear before the xcodebuild sub command. You can view the assembled command by viewing the job's build console.

scan-build uses the 'clang' executable relative to itself for static analysis by default.
--use-analyzer Xcode using the 'clang' packaged with Xcode (on OS X)
--use-analyzer [path to clang] to use the 'clang' from 'path to clang' or $PATH if no path specified.