libreadline8
  obsoletes "readline-<targettype> <= <version>"
  provides "readline-<targettype> = <version>"
readline-devel
 requires -readline-<targettype>
 requires "libreadline8-<targettype> = <version>"
 conflicts "readline5-devel-<targettype>"
 conflicts "readline6-devel-<targettype>"
 conflicts "readline7-devel-<targettype>"