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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: TIOCGLTC and TIOCGETC on MSDOS and w32
Date: Tue, 10 Aug 2010 20:21:27 +0300
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To: Dan Nicolaescu <dann@gnu.org>
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> From: Dan Nicolaescu <dann@gnu.org>
> Date: Mon, 09 Aug 2010 15:57:25 -0400
> 
> Are TIOCGLTC and TIOCGETC defined on MSDOS and w32?
> [very likely, but it would be nice if someone with access to these platforms could check]

TIOCGETC and TIOCGLTC are used in a call to ioctl, so any non-Posix
system is highly unlikely to have them, because Posix-style ioctl is
normally absent there.

I ran the preprocessor of sysdep.c and made sure that the resulting
file does not use any of these 2 on both w32 and MS-DOS.

> If they are not, we can completely remove the following code in systty.h:
> 
> #if defined (TIOCGLTC) && !defined (HAVE_TERMIOS)
> #define HAVE_LTCHARS
> #endif
> 
> #if defined (TIOCGETC) && !defined (HAVE_TERMIOS)
> #define HAVE_TCHARS
> #endif
> 
> which would enable remove of more code in other places...

Yes, you can do that.