EmptyGlobalAssignment: version 6.8.3-r1: line 21: empty global assignment: IUSE=""
  EmptyGlobalAssignment: version 7.17.7: line 21: empty global assignment: IUSE=""
  EmptyGlobalAssignment: version 7.17.8: line 21: empty global assignment: IUSE=""
  EmptyGlobalAssignment: version 7.17.9: line 21: empty global assignment: IUSE=""
  EmptyGlobalAssignment: version 7.17.10: line 21: empty global assignment: IUSE=""