?RCS: $Id: d_sfio.U,v $
?RCS:
?RCS: Copyright (c) 1996-1998 Andy Dougherty
?RCS:
?RCS: You may distribute under the terms of either the GNU General Public
?RCS: License or the Artistic License, as specified in the README file.
?RCS:
?RCS: $Log: d_sfio.U,v $
?RCS:
?MAKE:usesfio d_sfio: i_sfio Inlibc Myread Oldconfig sed libs \
	Setvar package
?MAKE:	-pick add $@ %<
?S:usesfio:
?S:	This variable is set to true when the user agrees to use sfio.
?S:	It is set to false when sfio is not available or when the user
?S:	explicitely requests not to use sfio.  It is here primarily so
?S:	that command-line settings can override the auto-detection of
?S:	d_sfio without running into a "WHOA THERE".
?S:.
?S:d_sfio:
?S:	This variable conditionally defines the USE_SFIO symbol,
?S:	and indicates whether sfio is available (and should be used).
?S:.
?C:USE_SFIO:
?C:	This symbol, if defined, indicates that sfio should
?C:	be used.
?C:.
?H:#$d_sfio	USE_SFIO		/**/
?H:.
?LINT:set d_sfio
?LINT:change libs

: see if sfio library is available
case "$i_sfio" in
$define)
	val=''
	set sfreserve val
	eval $inlibc
	;;
*)
	val="$undef"
	;;
esac
: Ok, but do we want to use it.
case "$val" in
$define)
	case "$usesfio" in
	true|$define|[yY]*) dflt='y';;
	*) dflt='n';;
	esac
	echo "$package can use the sfio library, but it is experimental."
	rp="You seem to have sfio available, do you want to try using it?"
	. ./myread
	case "$ans" in
	y|Y) ;;
	*)	echo "Ok, avoiding sfio this time.  I'll use stdio instead."
		val="$undef"
		: Remove sfio from list of libraries to use
		set `echo X $libs | $sed -e 's/-lsfio / /' -e 's/-lsfio$//'`
		shift
		libs="$*"
		echo "libs = $libs" >&4
		;;
	esac
	;;
*)	case "$usesfio" in
	true|$define|[yY]*)
		echo "Sorry, cannot find sfio on this machine" >&4
		echo "Ignoring your setting of usesfio=$usesfio" >&4
		;;
	esac
	;;
esac
?X:
?X: Only set d_sfio when final value is known to avoid spurious Whoas
?X: Then set usesfio accordingly to the current value, for next run
?X:
set d_sfio
eval $setvar
case "$d_sfio" in
$define) usesfio='true';;
*) usesfio='false';;
esac