dnl CF_CURSES_TERMCAP version: 10 updated: 2002/01/13 16:02:19
dnl -----------------
dnl Check if we should include <curses.h> to pick up prototypes for termcap
dnl functions.  On terminfo systems, these are normally declared in <curses.h>,
dnl but may be in <term.h>.  We check for termcap.h as an alternate, but it
dnl isn't standard (usually associated with GNU termcap).
dnl
dnl The 'tgoto()' function is declared in both terminfo and termcap.
dnl
dnl See CF_TYPE_OUTCHAR for more details.
AC_DEFUN([CF_CURSES_TERMCAP],
[
AC_REQUIRE([CF_CURSES_TERM_H])
AC_CACHE_CHECK(if we should include curses.h or termcap.h, cf_cv_need_curses_h,[
cf_save_CPPFLAGS="$CPPFLAGS"
cf_cv_need_curses_h=no

for cf_t_opts in "" "NEED_TERMCAP_H"
do
for cf_c_opts in "" "NEED_CURSES_H"
do

    CPPFLAGS="$cf_save_CPPFLAGS $CHECK_DECL_FLAG"
    test -n "$cf_c_opts" && CPPFLAGS="$CPPFLAGS -D$cf_c_opts"
    test -n "$cf_t_opts" && CPPFLAGS="$CPPFLAGS -D$cf_t_opts"

    AC_TRY_LINK([/* $cf_c_opts $cf_t_opts */
$CHECK_DECL_HDRS],
	[char *x = (char *)tgoto("")],
	[test "$cf_cv_need_curses_h" = no && {
	     cf_cv_need_curses_h=maybe
	     cf_ok_c_opts=$cf_c_opts
	     cf_ok_t_opts=$cf_t_opts
	}],
	[echo "Recompiling with corrected call (C:$cf_c_opts, T:$cf_t_opts)" >&AC_FD_CC
	AC_TRY_LINK([
$CHECK_DECL_HDRS],
	[char *x = (char *)tgoto("",0,0)],
	[cf_cv_need_curses_h=yes
	 cf_ok_c_opts=$cf_c_opts
	 cf_ok_t_opts=$cf_t_opts])])

	CPPFLAGS="$cf_save_CPPFLAGS"
	test "$cf_cv_need_curses_h" = yes && break
done
	test "$cf_cv_need_curses_h" = yes && break
done

if test "$cf_cv_need_curses_h" != no ; then
	echo "Curses/termcap test = $cf_cv_need_curses_h (C:$cf_ok_c_opts, T:$cf_ok_t_opts)" >&AC_FD_CC
	if test -n "$cf_ok_c_opts" ; then
		if test -n "$cf_ok_t_opts" ; then
			cf_cv_need_curses_h=both
		else
			cf_cv_need_curses_h=curses.h
		fi
	elif test -n "$cf_ok_t_opts" ; then
		cf_cv_need_curses_h=termcap.h
	elif test "$cf_cv_term_header" != no ; then
		cf_cv_need_curses_h=term.h
	else
		cf_cv_need_curses_h=no
	fi
fi
])

case $cf_cv_need_curses_h in
both) #(vi
	AC_DEFINE_UNQUOTED(NEED_CURSES_H)
	AC_DEFINE_UNQUOTED(NEED_TERMCAP_H)
	;;
curses.h) #(vi
	AC_DEFINE_UNQUOTED(NEED_CURSES_H)
	;;
term.h) #(vi
	AC_DEFINE_UNQUOTED(NEED_TERM_H)
	;;
termcap.h) #(vi
	AC_DEFINE_UNQUOTED(NEED_TERMCAP_H)
	;;
esac

])dnl
