[wwwdocs] Re: unreachable intro to gcc page linked to on readings page

[Jonathan Wakely <jwakely.gcc@gmail.com>]

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On Mon, 29 Aug 2022 at 11:31, Gerald Pfeifer wrote:
>
> On Wed, 24 Aug 2022, Jonathan Wakely wrote:
> >> a broken link points to
> >>
> >>   An introduction to GCC by Brian J. Gough.
> >>   . http://www.network-theory.co.uk/gcc/intro/
> > There are much more recent archived copies like
> > https://web.archive.org/web/20181113021321/http://www.network-theory.co.uk/gcc/intro/
> > I'm not sure it's worth updating the link to an archived copy of that
> > page, because all the links for buying a PDF or printed copy are
> > probably dead now anyway.
> >
> > We could link to https://archive.org/details/B-001-002-835 instead, or
> > to the archived HTML version. The newest capture of the HTML version
> > seems to be this, although I didn't check that all pages are archived:
> > https://web.archive.org/web/20181206025406/http://www.network-theory.co.uk/docs/gccintro/
> > My preference would be to link to that latter. Although it's quite
> > dated, the sections on basic compilation and compiler flags are still
> > relevant for beginners.
> >
> > Gerald?
>
> I searched around a bit myself (since indeed the original and printed
> versions seem to be gone) and landed at
>
>    https://archive.org/details/B-001-002-835
>
> as well. I probably would have gone for that, though the
> web.archive.org/web link you found works equally if you want to point
> there instead.

Why not both?  I've pushed the attached patch to [wwwdocs].

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commit 0e4c9a39789b6dbcd44b2e0d4a42b5885d3bddb2
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Sep 1 10:57:46 2022 +0100

    Replace stale link to the "An Introduction to GCC" book

diff --git a/htdocs/readings.html b/htdocs/readings.html
index 4269e9f0..5d1b78e8 100644
--- a/htdocs/readings.html
+++ b/htdocs/readings.html
@@ -22,8 +22,9 @@
 
 <ul>
 
-  <li><a href="http://www.network-theory.co.uk/gcc/intro/">An Introduction
-  to GCC</a> by Brian J. Gough.</li>
+  <li><a href="https://web.archive.org/web/20060106062936/http://www.network-theory.co.uk/gcc/intro/">An Introduction
+  to GCC</a> by Brian J. Gough
+  (<a href="https://archive.org/details/B-001-002-835/">e-book</a>).</li>
 
   <li><a href="https://en.wikibooks.org/wiki/GNU_C_Compiler_Internals">GNU C Compiler Internals (Wikibook)</a>, numerous contributors.</li>