libstdc++ and gcc versions (Re: [NetBSD 10.99.12 amd64] multimedia/phonon-qt5

[Makoto Fujiwara <makoto%if.t.u-tokyo.ac.jp@localhost>]

| What I do is to use the same gcc version for all packages. So if one of
| them requires gcc12, I set GCC_REQD+= 12 in /etc/mk.conf. It will be a
| while before you need to increase that number but when that happens you
| probably have to rebuild them all.

This is what I'm thinking. Various packages ask for different gcc versions.
It will result that serveral versions of gcc will be packaged. But if the only
one version is packaged for that run, it may be straight out some mixed
(libstdc++) versions.

Can this be automated ? (hopefully at least pbulk scan)
-> I may be wrong,

Let me rewrite:
  At particular package, serveral version of gcc may be packaged, because
of depending packages ask for different level, but if the only one at most
required is included .... (?)
-- 
Makoto Fujiwara
mef%NetBSD.org@localhost
makoto%if.t.u-tokyo.ac.jp@localhost