FAQ and Wiki page about -Wimplicit-function-declaration warning, review welcomed

[Steven]

Thanks for this. I found the FAQ and guide very useful.

> On Jan 24, 2022, at 2:42 AM, Jim DeLaHunt <list+macports-dev at jdlh.com> wrote:
> 
> Hello, MacPorts developers:
> 
> I was working on a Portfile, and came across the ever-popular "Warning: Configuration logfiles contain indications of -Wimplicit-function-declaration; check that features were not accidentally disabled". After a little searching, I could not find good instructions on what it meant to me and what I should do. After a bit more searching, I found useful posts to macports-dev and macports-user from last year.
> 
> I took what I learned, and wrote the wiki entries I wished I had found with just a little searching. I would welcome your review, and improvements. Go right ahead and edit the wiki entries if you want.
> 
> I added an FAQ:
> Why am I getting a message, "Warning… indications of -Wimplicit-function-declaration"?
> <https://trac.macports.org/wiki/FAQ#WhyamIgettingamessageWarningindicationsof-Wimplicit-function-declaration>
> 
> This FAQ is intended to be easy to find, and give a user who sees the warning (without having followed macports-dev and macports-user in detail for a year) some confidence that this is a known phenomenon, and some simple instructions on what to do about it.
> 
> I added a wiki page. It is intended to be sufficient for users in the first section, and sufficient for portfile developers in the remaining sections. It also shows up nicely in wiki search results for the text of the warning message.
> 
> WimplicitFunctionDeclaration <https://trac.macports.org/wiki/WimplicitFunctionDeclaration>
> 
> WimplicitFunctionDeclaration is wiki shorthand for a particular warning message, "Warning: Configuration logfiles contain indications of -Wimplicit-function-declaration; check that features were not accidentally disabled", which MacPorts sometimes displays when configuring a port. This page explains what you as a MacPorts user should understand about this message, and what helpful steps you can take. It also explains to port maintainers, and the adventurer who wants to diagnose the problem behind the warning, the reason why the message appears, and how to pursue the problem to the upstream developers.
> 
> Page structure:
> WimplicitFunctionDeclaration
>         The warning
>         Respond by filing MacPorts ticket(s)
>         What it means
>         Diagnosis
>         Respond by filing upstream bug reports
>         See also
>             Macports-users email threads
>             GNU Automake tools
> 
> Having written all that, I hope that I have equipped other novice Portfile developers to be prepared to turn these warnings into upstream bug fixes for their ports. I will now work on upstream bug reports for my ports.
> 
> I will revisit the WimplicitFunctionDeclaration page from time to time to do copy editing and to add new findings.
> 
> Best regards,
>     —Jim DeLaHunt, Vancouver, Canada
> 
>