The server you are using is shared with MANY other people. If you were to install it on the system as root, everyone would have to use it.
You don’t want what I have installed and I’m pretty sure you don’t want what I have installed so we have to play nice in our own areas. Many applications have ways of installing “outside” of the normal locations that root would install them and still be completely functional.
Try a google query like:
install libstdc shared host
and you might get some good hints.
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