Re: `gzip` dependency

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: phillip.lord@russet.org.uk,  emacs-devel@gnu.org
> Date: Mon, 11 Jan 2021 09:59:19 -0500
> 
> My question was instead about whether or not Emacs does indeed make use
> of `zlib-decompress-region` when it tries to read a gzipped Info file,

No, I don't think we do.

> and whether the Windows build does always provide
> `zlib-decompress-region`

Only if Emacs was built with zlib.

> or whether that function also requires an external dependency that
> may or may not be available

One needs both an Emacs compiled with zlib, and the zlib DLL
available.