[PATCH] Port GCC documentation to Sphinx

[Eli Zaretskii]

> Date: Tue, 29 Jun 2021 19:57:11 +0300
> From: Eli Zaretskii via Gcc <gcc@gcc.gnu.org>
> Cc: gcc@gcc.gnu.org, gcc-patches@gcc.gnu.org, joseph@codesourcery.com
> 
> Or how about this:
> 
>   `Overall Options'
> 
>        See Options Controlling the Kind of Output.
> 
>        *note -c. *note -S. *note -E. *note -o. ‘`file'’
>        *note -dumpbase. ‘`dumpbase'’ *note -dumpbase-ext.
>        ‘`auxdropsuf'’ *note -dumpdir. ‘`dumppfx'’ ‘-x’ ‘`language'’
>        *note -v. *note -###. *note –help.‘[=`class'[,...]]’
>        *note –target-help. *note –version. *note -pass-exit-codes
>        . *note -pipe. *note -specs.‘=`file'’ *note -wrapper
>        .‘@`file'’ *note -ffile-prefix-map.‘=`old'=`new'’ *note
>        -fplugin.‘=`file'’ ‘-fplugin-arg-’‘`name'=`arg'’
>        ‘-fdump-ada-spec’‘[-`slim']’ *note -fada-spec-parent.‘=`unit'’
>        *note -fdump-go-spec.‘=`file'’

I see that when I copied text into the mail, the "see" that Emacs
displays got replaced by "*note" (which is what actually appears in
the Info file).  So if you want to understand my references to the
ubiquitous "see", imagine that each "*note" is displayed as "see".

Apologies for any confusion.