Re: Emacs 27.1 Windows Binaries -- testing wanted

[Eli Zaretskii]

> From: Daniel Brooks <db48x@db48x.net>
> Date: Tue, 18 Aug 2020 11:11:19 -0700
> 
> If you'd like inspiration, Firefox does a pretty decent job at this;
> just visit about:buildconfig to see.

We have system-configuration-features, which shows the equivalent
info.

But this isn't Phillip's problem: the problem here is that the Windows
build of Emacs tries to load the optional libraries when they are
first required, and if the load fails, the corresponding feature will
behave as not available, even though Emacs was built to support that
feature.

IOW, the problem here is not to know how Emacs was built, but what
optional libraries are available to it at run time on the end-user's
machine.