dnl CF_SIZECHANGE version: 8 updated: 2000/11/04 12:22:16
dnl -------------
dnl Check for definitions & structures needed for window size-changing
dnl FIXME: check that this works with "snake" (HP-UX 10.x)
AC_DEFUN([CF_SIZECHANGE],
[
AC_REQUIRE([CF_STRUCT_TERMIOS])
AC_CACHE_CHECK(declaration of size-change, cf_cv_sizechange,[
    cf_cv_sizechange=unknown
    cf_save_CPPFLAGS="$CPPFLAGS"

for cf_opts in "" "NEED_PTEM_H"
do

    CPPFLAGS="$cf_save_CPPFLAGS"
    test -n "$cf_opts" && CPPFLAGS="$CPPFLAGS -D$cf_opts"
    AC_TRY_COMPILE([#include <sys/types.h>
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#else
#ifdef HAVE_TERMIO_H
#include <termio.h>
#endif
#endif
#ifdef NEED_PTEM_H
/* This is a workaround for SCO:  they neglected to define struct winsize in
 * termios.h -- it's only in termio.h and ptem.h
 */
#include        <sys/stream.h>
#include        <sys/ptem.h>
#endif
#if !defined(sun) || !defined(HAVE_TERMIOS_H)
#include <sys/ioctl.h>
#endif
],[
#ifdef TIOCGSIZE
	struct ttysize win;	/* FIXME: what system is this? */
	int y = win.ts_lines;
	int x = win.ts_cols;
#else
#ifdef TIOCGWINSZ
	struct winsize win;
	int y = win.ws_row;
	int x = win.ws_col;
#else
	no TIOCGSIZE or TIOCGWINSZ
#endif /* TIOCGWINSZ */
#endif /* TIOCGSIZE */
	],
	[cf_cv_sizechange=yes],
	[cf_cv_sizechange=no])

	CPPFLAGS="$cf_save_CPPFLAGS"
	if test "$cf_cv_sizechange" = yes ; then
		echo "size-change succeeded ($cf_opts)" >&AC_FD_CC
		test -n "$cf_opts" && cf_cv_sizechange="$cf_opts"
		break
	fi
done
])
if test "$cf_cv_sizechange" != no ; then
	AC_DEFINE(HAVE_SIZECHANGE)
	case $cf_cv_sizechange in #(vi
	NEED*)
		AC_DEFINE_UNQUOTED($cf_cv_sizechange )
		;;
	esac
fi
])dnl
