As announced here: http://lists.llvm.org/pipermail/llvm-dev/2019-April/131786.html Grouped option syntax (POSIX Utility Conventions) does not play well with -long-option A subsequent change will reject -long-option.
Thanks to Evgeniy Stepanov for reporting this. It might be a good idea to add a command iterator abstraction to MachO.h, but this fixes the bug for now. llvm-svn: 179848