# -*- autoconf -*-
# FILE: "/disk01/home/joze/src/tclreadline/configure.in"
# LAST MODIFICATION: "Tue Sep 14 11:23:46 1999 (joze)"
# FILE: "/home/joze/src/tclreadline/configure.in"
# LAST MODIFICATION: "Sun Sep 19 23:15:53 1999 (joze)"
# (C) 1998, 1999 by Johannes Zellner, <johannes@zellner.org>
# $Id$
# ---
#
# tclreadline -- gnu readline for tcl
# Copyright (C) 1999  Johannes Zellner
#

dnl	to configure the system for the local environment.

AC_REVISION($Revision$)

AC_INIT(tclreadline.c)
AC_CONFIG_HEADER(config.h)

TCLREADLINE_MAJOR_VERSION=0
TCLREADLINE_MINOR_VERSION=9
TCLREADLINE_PATCHLEVEL=3
TCLREADLINE_MAJOR_VERSION=1
TCLREADLINE_MINOR_VERSION=0
TCLREADLINE_PATCHLEVEL=0
TCLREADLINE_VERSION=$TCLREADLINE_MAJOR_VERSION.$TCLREADLINE_MINOR_VERSION
TCLREADLINE_PATCHLEVEL_STR=${TCLREADLINE_VERSION}.${TCLREADLINE_PATCHLEVEL}
VERSION=$TCLREADLINE_VERSION


AC_PREREQ(2.13)
AC_CONFIG_AUX_DIR(./aux)

else
    AC_MSG_RESULT(${READLINE_LIB_DIR}/libreadline${SHLIB_SUFFIX}${READLINE_VERSION_SUFFIX})
fi



# ---
# check, if curses or termcap is already
# linked with libreadline. (on newer Linux
# systems it is.)
# check for the terminal library.
# This part was shamelessly stolen from
# the vim-5.5 configure.in.
# ---

# TERM_LIB=""
# AC_CHECK_LIB(readline, tputs, termcaps=yes, termcaps=no)
termcaps=no
if test "$termcaps" = "no"; then

olibs="$LIBS"
AC_MSG_CHECKING(--with-tlib argument)
AC_ARG_WITH(tlib, [  --with-tlib=library     terminal library to be used ],)
if test -n "$with_tlib"; then
	AC_MSG_RESULT($with_tlib)
	LIBS="$LIBS -l$with_tlib"
else
	AC_MSG_RESULT([automatic terminal library selection])
	dnl  Newer versions of ncurses are preferred over anything.
	dnl  Older versions of ncurses have bugs, get a new one!
	dnl  Digital Unix (OSF1) should use curses (Ronald Schild).
	case "`uname -s 2>/dev/null`" in
		OSF1) tlibs="ncurses curses termlib termcap";;
		*)    tlibs="ncurses termlib termcap curses";;
	esac
	for libname in $tlibs; do
		AC_CHECK_LIB($libname, tgetent,,)
		if test "x$olibs" != "x$LIBS"; then
			dnl It's possible that a library is found but it doesn't work
			dnl e.g., shared library that cannot be found
			dnl compile and run a test program to be sure
			AC_TRY_RUN([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
main() {char *s; s=(char *)tgoto("%p1%d", 0, 1); exit(0); }],
			res="OK", res="FAIL", res="FAIL")
			if test "$res" = "OK"; then
			  break
    # ---
    # nope. tputs() is unresolved in libreadline, so
    # check if we want libcurses or libtermcap.
    # ---
			fi
			AC_MSG_RESULT($libname library is not usable)
			LIBS="$olibs"
		fi
	done
fi
if test "x$olibs" != "x$LIBS"; then
	AC_MSG_CHECKING(whether we talk terminfo)
	AC_TRY_RUN([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
main()
{char *s; s=(char *)tgoto("%p1%d", 0, 1); exit(!strcmp(s==0 ? "" : s, "1")); }],
	AC_MSG_RESULT([no -- we are in termcap land]),
	AC_MSG_RESULT([yes -- terminfo spoken here]); AC_DEFINE(TERMINFO),
	AC_MSG_ERROR(failed to compile test program.))
else
	AC_MSG_ERROR(none found. Please retry with the --with-tlib argument)
fi

AC_MSG_CHECKING(whether termcap.h contains ospeed)
    AC_ARG_WITH(
        termcap, 
AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
        [  --with-termcap          use termcap library instead of curses.],
        TERM_LIB="termcap",
        TERM_LIB="curses"
    )
    AC_CHECK_LIB($TERM_LIB, tputs, tputs_ok=yes, tputs_ok=no)
#endif
			], [ospeed = 20000],
	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_OSPEED),
	[AC_MSG_RESULT(no)
	AC_MSG_CHECKING(whether ospeed can be extern)
	AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
extern short ospeed;
			], [ospeed = 20000],
		AC_MSG_RESULT(yes); AC_DEFINE(OSPEED_EXTERN),
		AC_MSG_RESULT(no))]
)

    if test "$tputs_ok" = "no"; then
        AC_MSG_ERROR(tputs() not found in lib$TERM_LIB.)
    else
        TERM_LIB=-l$TERM_LIB
    fi
fi
AC_MSG_CHECKING([whether termcap.h contains UP, BC and PC])
AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
			], [if (UP == 0 && BC == 0) PC = 1],
	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_UP_BC_PC),
	[AC_MSG_RESULT(no)
	AC_MSG_CHECKING([whether UP, BC and PC can be extern])
	AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
extern char *UP, *BC, PC;
			], [if (UP == 0 && BC == 0) PC = 1],
		AC_MSG_RESULT(yes); AC_DEFINE(UP_BC_PC_EXTERN),
		AC_MSG_RESULT(no))]
	)

AC_MSG_CHECKING(whether tputs() uses outfuntype)
AC_TRY_COMPILE([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
			], [extern int xx(); tputs("test", 1, (outfuntype)xx)],
	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_OUTFUNTYPE),
	AC_MSG_RESULT(no))


#--------------------------------------------------------------------
#   Check for appropriate version of gnu readline
#   (older versions of gnu readline don't have
#    rl_callback_read_char ()).
#--------------------------------------------------------------------