[libstdc++, doc] Update prerequisites documentation

[Gerald Pfeifer]

On Sun, 30 Oct 2011, Jonathan Wakely wrote:
> Are those instructions not valid for Fedora though?  And RHEL?

Anything using "rpm -e --nodeps" is not valid anywhere, I'd claim.

And "rpm -i --define "_install_langs all" glibc-common-2.2.5-34.i386.rpm"
definitely won't work on anything released in the last decade or so. ;-)

That said, I did check a recent Fedora installation and found all
locales to be installed by default.  And a 2005 vintage report at
https://bugzilla.redhat.com/show_bug.cgi?id=156477 confirms this
was the case already back then.

I hope this addresses your questions?

Gerald