Eli Zaretskii wrote:
> Can we please at least mention
> specific compiler options and any other tools that could be used
> instead of the built-in facilities we are removing?  Bonus points for
> adding to etc/DEBUG a section with more details about the compiler
> options, tools, and techniques of using them for debugging specific
> Emacs problems for which these configure options were introduced.

OK, I tried to earn bonus points by installing the attached patch into master, 
on top of the two other patches I mentioned earlier.