GNU bug report logs - #62265
Underline does not work in Terminal Emacs

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Mohsin Kaleem <mohkale <at> kisara.moe>
Cc: jporterbugs <at> gmail.com, 62265 <at> debbugs.gnu.org
Subject: bug#62265: Underline does not work in Terminal Emacs
Date: Sun, 19 Mar 2023 13:37:14 +0200

> From: Mohsin Kaleem <mohkale <at> kisara.moe>
> Cc: 62265 <at> debbugs.gnu.org
> Date: Sun, 19 Mar 2023 10:07:14 +0000
> 
> Hi, so turns out terminfo returns a max-ptr for tigetstr when the
> terminfo definition is missing. There's checks for this for setb24 and
> setf24 but not in the patch I supplied. Updated to check this and added
> a macro definition to avoid repeating the same condition logic 3 times.

Thanks.

However, what about the non-TERMINFO branch?  Do termcap databases
support this capability and tigetstr?  I wonder whether we should do
one of the following:

  . support "smxx" only when TERMINFO is defined
  . support "smxx" regardless of whether TERMINFO is defined

With your patch, it's neither here nor there.  tgetstr is documented
to pay attention only to the first 2 characters of the capability's
name, at least in the ncurses documentation.  If this is generally so
in other curses libraries, then leaving the tgetstr call intact in the
non-TERMINFO case makes no sense.

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