?RCS: $Id: i_termio.U,v 3.0 1993/08/18 12:08:44 ram Exp $
?RCS:
?RCS: Copyright (c) 1991-1993, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic Licence,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 3.0.
?RCS:
?RCS: $Log: i_termio.U,v $
?RCS: Revision 3.0  1993/08/18  12:08:44  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?X:
?X:	Include all three (possible) definitions in config_h.SH.
?X:	There are enough implementations of posix termios.h out there 
?X:	that do not work well with other system headers or are
?X:	incomplete.  This makes it easier for the user to back off 
?X:	and try sgtty.h or i_termio.h instead.
?X:
?MAKE:i_termio i_sgtty i_termios: test Inlibc Cppsym Guess Setvar Findhdr
?MAKE:	-pick add $@ %<
?S:i_termio:
?S:	This variable conditionally defines the I_TERMIO symbol, which
?S:	indicates to the C program that it should include <termio.h> rather
?S:	than <sgtty.h>.
?S:.
?S:i_termios:
?S:	This variable conditionally defines the I_TERMIOS symbol, which
?S:	indicates to the C program that the POSIX <termios.h> file is
?S:	to be included.
?S:.
?S:i_sgtty:
?S:	This variable conditionally defines the I_SGTTY symbol, which
?S:	indicates to the C program that it should include <sgtty.h> rather
?S:	than <termio.h>.
?S:.
?C:I_TERMIO ~ %<:
?C:	This symbol, if defined, indicates that the program should include
?C:	<termio.h> rather than <sgtty.h>.  There are also differences in
?C:	the ioctl() calls that depend on the value of this symbol.
?C:.
?C:I_TERMIOS ~ %<:
?C:	This symbol, if defined, indicates that the program should include
?C:	the POSIX termios.h rather than sgtty.h or termio.h.
?C:	There are also differences in the ioctl() calls that depend on the
?C:	value of this symbol.
?C:.
?C:I_SGTTY ~ %<:
?C:	This symbol, if defined, indicates that the program should include
?C:	<sgtty.h> rather than <termio.h>.  There are also differences in
?C:	the ioctl() calls that depend on the value of this symbol.
?C:.
?H:?%<:#$i_termio I_TERMIO		/**/
?H:?%<:#$i_termios I_TERMIOS		/**/
?H:?%<:#$i_sgtty I_SGTTY		/**/
?H:.
?T:val2 val3
?LINT:set i_termio i_sgtty i_termios
: see if this is a termio system
val="$undef"
val2="$undef"
val3="$undef"
?X: Prefer POSIX-approved termios.h over all else
if $test `./findhdr termios.h`; then
	set tcsetattr i_termios
	eval $inlibc
	val3="$i_termios"
fi
echo " "
case "$val3" in
"$define") echo "You have POSIX termios.h... good!" >&4;;
*) if Cppsym pyr; then
		case "`/bin/universe`" in
		ucb) if $test `./findhdr sgtty.h`; then
				val2="$define"
				echo "<sgtty.h> found." >&4
			else
				echo "System is pyramid with BSD universe."
				echo "<sgtty.h> not found--you could have problems." >&4
			fi;;
		*) if $test `./findhdr termio.h`; then
				val="$define"
				echo "<termio.h> found." >&4
			else
				echo "System is pyramid with USG universe."
				echo "<termio.h> not found--you could have problems." >&4
			fi;;
		esac
?X: Start with USG to avoid problems if both usg/bsd was guessed
	elif usg; then
		if $test `./findhdr termio.h`; then
			echo "<termio.h> found." >&4
			val="$define"
		elif $test `./findhdr sgtty.h`; then
			echo "<sgtty.h> found." >&4
			val2="$define"
		else
echo "Neither <termio.h> nor <sgtty.h> found--you could have problems." >&4
		fi
	else
		if $test `./findhdr sgtty.h`; then
			echo "<sgtty.h> found." >&4
			val2="$define"
		elif $test `./findhdr termio.h`; then
			echo "<termio.h> found." >&4
			val="$define"
		else
echo "Neither <sgtty.h> nor <termio.h> found--you could have problems." >&4
		fi
	fi;;
esac
set i_termio; eval $setvar
val=$val2; set i_sgtty; eval $setvar
val=$val3; set i_termios; eval $setvar