bug#49609: [PATCH] Add option for handling SGR control sequences in compilation-mode

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Ivan Sokolov <ivan-p-sokolov@ya.ru>,  49609@debbugs.gnu.org
> Date: Mon, 19 Jul 2021 15:53:26 +0200
> 
> >> >> +If the symbol `filter', then filter all SGR control sequences.
> >> >
> >> > Perhaps this should say what "SGR" is?
> >> 
> >> One of the ANSI escape sequences.
> >
> > SGR = Select Graphic Rendition.
> 
> I see.  And these are control sequences that are output by...  gcc?  As
> opposed to ... other ANSI escape sequences?

No, these two terms are synonyms, AFAIK.  GCC doesn't emit any SGR
sequences that other similar applications, like Grep, don't.  They are
just sequences to produced colors and other attributes: bold,
underline, etc.  The intent is to make the important parts of the
output easier to spot.