xml/manual/debug_mode.xml reference to Namespace Association

[Jonathan Wakely]

On 1 March 2017 at 13:45, Gerald Pfeifer wrote:
> I found that xml/manual/debug_mode.xml has a reference to the
> following http://gcc.gnu.org/onlinedocs/gcc/Namespace-Association.html
> in
>
>   <para>Achieving link- and run-time coexistence is not a trivial
>     implementation task. To achieve this goal we required a small
>     extension to the GNU C++ compiler (since incorporated into the C++11
>     language specification, described in the GCC Manual for the C++ language as
>     <link xmlns:xlink="http://www.w3.org/1999/xlink"
>     xlink:href="http://gcc.gnu.org/onlinedocs/gcc/Namespace-Association.html#Namespace-Association">namespace
>     association</link>), and a complex organization of debug- and
>     release-modes. The end result is that we have achieved per-use
>     recompilation but have had to give up some checking of the
>     <code>std::basic_string</code> class template (namely, safe
>     iterators).
>   </para>
>
> That link is broken, and I could not find any suitable replacement
> in the GCC documentation.
>
> Any hints?  Suggestions how to go about this?  (Perhaps simply omit
> the first half of that sentence?)

Jason deprecated the feature and removed the docs in r244936.

I agree with François's suggestion, but I wouldn't even bother
mentioning anything about previous modes, just say "To achieve this
goal we use inline namespaces and a complex organization ..."