Created attachment 498426 [details] No-Op rebuilds for unchanged API/ABI I think it can be considered a bug in its own right that portage requires actual recompiles of dependers during effective no-ops such as slot changes of a dependency. While it might be argued that no particular notion of such no-op revisions should be incorporated into ebuilds, there must be at least a way to inform emerge of the futility of the endeavour, manually (in a fashion similar to the -n flag). Recent example of bzip2 and zlib attached.
