Hallo Benny!

 BP> if you tell portage to let glib and mesalib use python3 its done

I am sure mesalib requires python2.  Have you tried compiling it with only
python3 available?

 BP> if you know gentoo more you will hate precompiled distros more :)

I don't hate them but I don't like that most don't tell me what I want to know
before deciding whether or not I wish to try them out.  For example what
versions of gcc, glibc, kernel version, etc.  The rest doesn't matter much and
could care less about things like firefox nevermind which version.

 BP> where is that dutch come from ? :)

Half of the vi Dutch came from Henri Derksen if I remember correctly.  The
English version I came up with around twenty years ago during a discussion in
this echoarea about mutiltasking and Madonna and using it as a tagline for
"Little Mikey's EuroPoint" seems like a great idea given where the bossnode is
located.

Het leven is goed,
Maurice

... Huil niet om mij, ik heb vi.
--- GNU bash, version 4.4.23(1)-release (x86_64-bonnell-linux-gnu)