dnl ---------------------------------------------------------------------------
dnl Look for the curses libraries.  Older curses implementations may require
dnl termcap/termlib to be linked as well.
AC_DEFUN([CF_CURSES_LIBS],[
AC_CHECK_FUNC(initscr,,[
case $host_os in #(vi
freebsd*) #(vi
	AC_CHECK_LIB(mytinfo,tgoto,[LIBS="-lmytinfo $LIBS"])
	;;
hpux10.*|hpux11.*)
	AC_CHECK_LIB(cur_colr,initscr,[
		LIBS="-lcur_colr $LIBS"
		CFLAGS="-I/usr/include/curses_colr $CFLAGS"
		ac_cv_func_initscr=yes
		],[
	AC_CHECK_LIB(Hcurses,initscr,[
		# HP's header uses __HP_CURSES, but user claims _HP_CURSES.
		LIBS="-lHcurses $LIBS"
		CFLAGS="-D__HP_CURSES -D_HP_CURSES $CFLAGS"
		ac_cv_func_initscr=yes
		])])
	;;
linux*) # Suse Linux does not follow /usr/lib convention
	LIBS="$LIBS -L/lib"
	;;
esac

if test ".$With5lib" != ".no" ; then
if test -d /usr/5lib ; then
	# SunOS 3.x or 4.x
	CPPFLAGS="$CPPFLAGS -I/usr/5include"
	LIBS="$LIBS -L/usr/5lib"
fi
fi

if test ".$ac_cv_func_initscr" != .yes ; then
	cf_save_LIBS="$LIBS"
	cf_term_lib=""
	cf_curs_lib=""

	# Check for library containing tgoto.  Do this before curses library
	# because it may be needed to link the test-case for initscr.
	AC_CHECK_FUNC(tgoto,[cf_term_lib=predefined],[
		for cf_term_lib in termcap termlib unknown
		do
			AC_CHECK_LIB($cf_term_lib,tgoto,[break])
		done
	])

	# Check for library containing initscr
	test "$cf_term_lib" != predefined && test "$cf_term_lib" != unknown && LIBS="-l$cf_term_lib $cf_save_LIBS"
	for cf_curs_lib in cursesX curses ncurses xcurses jcurses unknown
	do
		AC_CHECK_LIB($cf_curs_lib,initscr,[break])
	done
	test $cf_curs_lib = unknown && AC_ERROR(no curses library found)

	LIBS="-l$cf_curs_lib $cf_save_LIBS"
	if test "$cf_term_lib" = unknown ; then
		AC_MSG_CHECKING(if we can link with $cf_curs_lib library)
		AC_TRY_LINK([#include <${cf_cv_ncurses_header-curses.h}>],
			[initscr()],
			[cf_result=yes],
			[cf_result=no])
		AC_MSG_RESULT($cf_result)
		test $cf_result = no && AC_ERROR(Cannot link curses library)
	elif test "$cf_term_lib" != predefined ; then
		AC_MSG_CHECKING(if we need both $cf_curs_lib and $cf_term_lib libraries)
		AC_TRY_LINK([#include <${cf_cv_ncurses_header-curses.h}>],
			[initscr(); tgoto((char *)0, 0, 0);],
			[cf_result=no],
			[
			LIBS="-l$cf_curs_lib -l$cf_term_lib $cf_save_LIBS"
			AC_TRY_LINK([#include <${cf_cv_ncurses_header-curses.h}>],
				[initscr()],
				[cf_result=yes],
				[cf_result=error])
			])
		AC_MSG_RESULT($cf_result)
	fi
fi

])])



dnl @synopsis AC_LIB_READLINE
dnl
dnl Searches for a readline compatible library.  If found, defines
dnl `HAVE_LIBREADLINE'.  If the found library has the `add_history'
dnl function, sets also `HAVE_READLINE_HISTORY'.  Also checks for the
dnl locations of the necessary include files and sets `HAVE_READLINE_H'
dnl or `HAVE_READLINE_READLINE_H' and `HAVE_READLINE_HISTORY_H' or
dnl 'HAVE_HISTORY_H' if the corresponding include files exists.
dnl
dnl The libraries that may be readline compatible are `libedit',
dnl `libeditline' and `libreadline'.  Sometimes we need to link a termcap
dnl library for readline to work, this macro tests these cases too by
dnl trying to link with `libtermcap', `libcurses' or `libncurses' before
dnl giving up.
dnl
dnl Here is an example of how to use the information provided by this
dnl macro to perform the necessary includes or declarations in a C file:
dnl
dnl   #include <config.h>
dnl
dnl   #ifdef HAVE_LIBREADLINE
dnl   #if defined(HAVE_READLINE_READLINE_H)
dnl   #include <readline/readline.h>
dnl   #elif defined(HAVE_READLINE_H)
dnl   #include <readline.h>
dnl   #else /* !defined(HAVE_READLINE_H) */
dnl   extern char *readline ();
dnl   #endif /* !defined(HAVE_READLINE_H) */
dnl   char *cmdline = NULL;
dnl   #else /* !defined(HAVE_READLINE_READLINE_H) */
dnl     /* no readline */
dnl   #endif /* HAVE_LIBREADLINE */
dnl
dnl   #ifdef HAVE_READLINE_HISTORY
dnl   #if defined(HAVE_READLINE_HISTORY_H)
dnl   #include <readline/history.h>
dnl   #elif defined(HAVE_HISTORY_H)
dnl   #include <history.h>
dnl   #else /* !defined(HAVE_HISTORY_H) */
dnl   extern void add_history ();
dnl   extern int write_history ();
dnl   extern int read_history ();
dnl   #endif /* defined(HAVE_READLINE_HISTORY_H) */
dnl     /* no history */
dnl   #endif /* HAVE_READLINE_HISTORY */
dnl
dnl
dnl @version $Id$
dnl @author Ville Laurikari <vl@iki.fi>
dnl
AC_DEFUN([AC_LIB_READLINE], [
  AC_CACHE_CHECK([for a readline compatible library],
                 ac_cv_lib_readline, [
    ORIG_LIBS="$LIBS"
    for readline_lib in readline edit editline; do
      for termcap_lib in "" termcap curses ncurses; do
        if test -z "$termcap_lib"; then
          TRY_LIB="-l$readline_lib"
        else
          TRY_LIB="-l$readline_lib -l$termcap_lib"
        fi
        LIBS="$ORIG_LIBS $TRY_LIB"
        AC_TRY_LINK_FUNC(readline, ac_cv_lib_readline="$TRY_LIB")
        if test -n "$ac_cv_lib_readline"; then
          break
        fi
      done
      if test -n "$ac_cv_lib_readline"; then
        break
      fi
    done
    if test -z "$ac_cv_lib_readline"; then
      ac_cv_lib_readline="no"
    fi
    LIBS="$ORIG_LIBS"
  ])

  if test "$ac_cv_lib_readline" != "no"; then
    LIBS="$LIBS $ac_cv_lib_readline"
    AC_DEFINE(HAVE_LIBREADLINE, 1,
              [Define if you have a readline compatible library])
    AC_CHECK_HEADERS(readline.h readline/readline.h)
    AC_CACHE_CHECK([whether readline supports history],
                   ac_cv_lib_readline_history, [
      ac_cv_lib_readline_history="no"
      AC_TRY_LINK_FUNC(add_history, ac_cv_lib_readline_history="yes")
    ])
    if test "$ac_cv_lib_readline_history" = "yes"; then
      AC_DEFINE(HAVE_READLINE_HISTORY, 1,
                [Define if your readline library has \`add_history'])
      AC_CHECK_HEADERS(history.h readline/history.h)
    fi
  fi

])