With LLVM upgrade, I'm getting repeated reports that users can't run clang because they did not update PATH. While I could warn about that in ebuild, I think it's genetic enough issue to warrant adding into Portage. Basically, Portage could detect if the batch of installs results in effective PATH changing, and print a frenetic warning/instruction including: $ . /etc/profile $ hash -r
s/frenetic/generic/
I suppose we could show the same message if any environment variable changes, since changes to any environment variables can impact users in various ways.