bug#51611: 29.0.50; Compiling emacs 29.0.50 on macOS

[Eli Zaretskii]

[Please use Reply All when replying, to keep the bug tracker on the CC.]

> From: Niels Søndergaard <nisoni@algon.dk>
> Date: Fri, 5 Nov 2021 16:25:24 +0100
> 
> It is at:  "/opt/homebrew/opt/webp/include/webp/decode.h”,
> I just wrote that in “image.c”, and the compilation went well.
> 
> And yes, I know, that if change anything in image.c, then it will be 
> overwritten.

Please show the part of config.log where it looks for webp package.
It was supposed to detect the compiler flags for finding the include
directory there, but for some reason didn't.