On Wed, 9 Nov 2022, Martin Liška wrote:

> Hi.
> 
> I think we should remove documentation for unsupported GCC releases
> as it's indexed by Google engine.

I'd agree with previous responses that outright removing the links is
undesirable, and pointing Google to recent documentation should be done
by annotating links, e.g. via rel=canonical as indicated by Joseph.

I would add that adding rel=canonical links seems doable without modifying
old files, by configuring the web server to add HTTP Link: header.

> Second reason is that the page is long
> one one can't easily jump to Current development documentation.

For this I would suggest using the <details> tag to neatly fold links for
old releases. Please see the attached patch.

Alexander