With <sys-apps/shadow-4.1 installed, the groupadd command does not support the -r switch. This switch is used in the current eutils.eclass. This leads to failing ebuilds when they call the enewgroup function from the eclass. There is no hint at the cause, so the user has to figure out that an outdated sys-apps/shadow caused the error. Reproducible: Always Steps to Reproduce: 1. emerge "=shadow-4.0.18.2" 2. emerge kqemu Actual Results: Observe the ebuild failing with "groupadd: no such option: -r" -> "enewgroup failed". Expected Results: The eutils.eclass shoud emit a useful description of what caused the error: "Your groupadd command is outdated. Please emerge >=shadow-4.1.2.2 and retry". This is only a bug as long as <sys-apps/shadow-4.1 is in the tree, and it might not affect too many people. It however affected me, and a better error description would have saved some time. :)
*** This bug has been marked as a duplicate of bug 367633 ***