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I submitted this yesterday in r274171. I think this allows for a more intuitive way to structure the options of command line tools. It's optional and if you do nothing llvm::cl will work as it always has for you. Probably self explanatory, but here's some output of --help from llvm-pdbdump, which was updated to use subcommands in r274247, in case anyone wants to see what this looks

Thanks, I tried calling ResetAllOptionOccurrences after the run like this… // Compile the module TimeCompilations times to give better compile time // metrics. for (unsigned I = TimeCompilations; I; --I) if (int RetVal = compileModule(argv, Context)) return RetVal; if (YamlFile) YamlFile->keep(); cl::ResetAllOptionOccurrences(); return 0; } Unfortunately