if test -z "$TCL_INCLUDE_DIR"; then
    AC_MSG_ERROR([
  Can't find tcl.h.  Use --with-tcl-includes to specify the directory
  containing tcl.h on your system.])
else
    AC_MSG_RESULT($TCL_INCLUDE_DIR/tcl.h)
fi


# ---
# check for the terminal library.
# ---

AC_ARG_WITH(tlib-library,
    [  --with-tlib-library=DIR
		  lib spec to tlib (e.g. '-L/usr/local/lib -lncurses')],
    LIBS="$LIBS $withval",
    for tlib in ncurses termlib termcap curses; do
	brk=yes
	AC_CHECK_LIB($tlib, tputs, , brk=no)
	if test $brk = "yes"; then
	    HAVE_TLIB=yes
	    break
	fi
    done
    if test "x" = "x$HAVE_TLIB"; then
	AC_MSG_ERROR([
	    no terminal library found. Please retry with the --with-tlib argument.
	])
    fi
)


#--------------------------------------------------------------------
#   Check for readline.h
#--------------------------------------------------------------------

AC_ARG_WITH(readline-includes,
            [  --with-readline-includes=DIR readline include files in DIR],
            rl_includes=$withval, rl_includes="")

#!/usr/local/bin/tclsh
# FILE: "/home/joze/src/tclreadline/pkgIndex.tcl.in"
# LAST MODIFICATION: "Mit, 10 Jan 2001 06:29:33 +0100 (joze)"
# (C) 1998 - 2001 by Johannes Zellner, <johannes@zellner.org>
# $Id$
# ---
# tclreadline -- gnu readline for tcl
# http://www.zellner.org/tclreadline/

#endif

#include "tclreadline.h"
static const char* tclrl_library = TCLRL_LIBRARY;
static const char* tclrl_version_str = TCLRL_VERSION_STR;
static const char* tclrl_patchlevel_str = TCLRL_PATCHLEVEL_STR;

#define MALLOC(size) Tcl_Alloc((int) size)
#define FREE(ptr) if (ptr) { Tcl_Free((char*) ptr); ptr = 0; }
#define MALLOC(size) malloc((int) size)
#define FREE(ptr) if (ptr) { free((char*) ptr); ptr = 0; }

enum {
    _CMD_SET     = (1 << 0),
    _CMD_GET     = (1 << 1)
};

	    matches[i] = (char*) NULL; /* terminate */
	}
	Tcl_ResetResult(tclrl_interp); /* clear result space */
    }

    if (!matches && tclrl_use_builtin_completer) {
	matches = completion_matches(text, TclReadline0generator);
	matches = rl_completion_matches(text, (rl_compentry_func_t *)TclReadline0generator);
    }

    return matches;
}

static char*
TclReadline0generator(char* text, int state)

to modify your .tclshrc according to the section \fBFILES\fP.

For the functionality of the GNU readline you should refer to
the readline's documentation.

.PP
The following list will give all commands, which are currently
implemented in the shared lib (e.g. libtclreadline@TCLREADLINE_VERSION@.so).
implemented in the shared lib (e.g. libtclreadline@VERSION@.so).
Additional commands were introduced in a startup script
\fBtclreadlineSetup.tcl\fP, which lives in the tclreadline
installation directory.
(typically something like /usr/local/lib/tclreadline ..)
These commands are primarily for internal use and not documented here.

Note that all commands reside in the namespace \fB::tclreadline::\fP.

of the line). The default for this script is "puts {}; exit". Setting
this to an empty value disables any action on eof.
\fBtclreadline::readline eof\fP returns the current eof script.

.TP 5
\fB::tclreadline::readline initialize\fP \fIhistoryfile\fP
initialize the tclreadline interface and read the history from
the \fIhistoryfile\fP. On succes an empty string is returned.
the \fIhistoryfile\fP. On success an empty string is returned.
This command has to be called before any other tclreadline commands.

.TP 5
\fB::tclreadline::readline read\fP \fIprompt\fP
prints the \fIprompt\fP to stdout and enters the tclreadline event
loop. Both readline and X events are processed. Returns the
(eventually history-expanded) input string.

it is probably a good idea to start with tclreadline::Loop
(see the file tclreadlineSetup.tcl).

.TP 5
\fB::tclreadline::prompt1\fP
a proc which is called by ::tclreadline::Loop and returns a string
which will be displayed as the primary prompt. This prompt will be
something like "[info nameofexecutable] \[[pwd]\]" possibly fancy colored.
something like "[info nameofexecutable] \\[[pwd]\\]" possibly fancy colored.
The default proc is defined on entering the ::tclreadline::Loop,
if it is not already defined. So: If you define your own proc
::tclreadline::prompt1 before entering ::tclreadline::Loop, this
proc is called each time the prompt is to be displayed.
Example:
.CS
    package require tclreadline
    namespace eval tclreadline {
        proc prompt1 {} {
            return "[clock format [clock seconds]]> "
        }
    }
    ::tclreadline::Loop
.CE

Note that non-printable control characters as color control characters
must be enclosed in literal ctrl-a / ctrl-b to tell readline the length
of the printable prompt. See for example the variable `prompt_string'
in the file tclreadlineSetup.tcl in your tclreadline installation directory.

.TP 5
\fB::tclreadline::prompt2\fP
a proc which is called by ::tclreadline::Loop and returns a string
which will be displayed as the secondary prompt when interactively
prompting  for  continuation  of  an incomplete command.

.\" .SH "EXAMPLES"


.\" .SH "ENVIRONMENT VARIABLES"

.SH "VARIABLES"

\fItclreadline\fP defines the following variables in the
namespace \fI::tclreadline\fP:
(for backwards compatiblity the global variables tclreadline_version,
(for backwards compatibility the global variables tclreadline_version,
 tclreadline_patchLevel and tclreadline_library are still present).

.TP 5
\fBtclreadline::version\fP (read-only)
holds the version string "@TCLREADLINE_VERSION@".
holds the version string "@VERSION@".

.TP 5
\fBtclreadline::patchLevel\fP (read-only)
holds the patch level string "@PATCHLEVEL_STR@".

.TP 5
\fBtclreadline::library\fP (read-only)
holds the library string "@TCLREADLINE_LIBRARY@".
holds the library string "@TCLRL_DIR@".

.TP 5
\fBtclreadline::license\fP (read-only)
holds a BSD license statement.

.TP 5
\fBtclreadline::historyLength\fP

					return 0
				}
			} else {
				return 0
			}
		}
	}
	if {![catch [list set type [image type ${cmd}]]]} {
	if {![catch {set type [image type $cmd]}]} {
		switch -- ${type} {
			photo {
				set result [PhotoObj ${text} ${start} ${end} ${line} ${pos}]
				return 1
			}
			default {
				# let the fallback completers do the job.

			set alias [uplevel [info level] \
			subst [lindex [lindex [QuoteQuotes ${line}] 0] 0]]

			# make `alias' a fully qualified name.
			# this can raise an error, if alias is
			# no valid command.
			#
			if {[catch [list set alias [namespace origin $alias]]]} {
			if {[catch {set alias [namespace origin $alias]}]} {
				return ""
			}

			# strip leading ::'s.
			#
			regsub -all {^::} $alias {} alias
			set namespc [namespace qualifiers $alias]

# proc complete(regexp) {text start end line pos mod} {
#     We're not on windoze here ...
# }

proc complete(regsub) {text start end line pos mod} {
	set prev [PreviousWord ${start} ${line}]
	if {[llength ${prev}] && "--" != $prev && \
		("-" == [string index ${prev} 0] || 1 == ${pos)}} {
		("-" == [string index ${prev} 0] || 1 == ${pos})} {
		set cmds [RemoveUsedOptions ${line} {
			-all -nocase --} {--}]
		if {[llength ${cmds}]} {
			return [string trim [CompleteFromList ${text} ${cmds}]]
		}
	} else {
		set virtual_pos [expr ${pos} - [FirstNonOption ${line}]]

	return [CompleteFromList ${text} [RemoveUsedOptions ${line} {
		-nobackslashes -nocommands -novariables <string>}]]
}

proc complete(switch) {text start end line pos mod} {
	set prev [PreviousWord ${start} ${line}]
	if {[llength ${prev}] && "--" != ${prev} && \
		("-" == [string index ${prev} 0] || 1 == ${pos)}} {
		("-" == [string index ${prev} 0] || 1 == ${pos})} {
		set cmds [RemoveUsedOptions ${line} {
			-exact -glob -regexp --} {--}]
		if {[llength ${cmds}]} {
			return [string trim [CompleteFromList ${text} ${cmds}]]
		}
	} else {
		set virtual_pos [expr ${pos} - [FirstNonOption ${line}]]

#!/usr/local/bin/tclsh
# FILE: "/home/joze/src/tclreadline/tclreadlineInit.tcl.in"
# LAST MODIFICATION: "Mit, 10 Jan 2001 06:29:33 +0100 (joze)"
# (C) 1998 - 2001 by Johannes Zellner, <johannes@zellner.org>
# $Id$
# ---
# tclreadline -- gnu readline for tcl
# http://www.zellner.org/tclreadline/

#!/usr/locanl/bin/tclsh
# FILE: "/home/joze/src/tclreadline/tclreadlineSetup.tcl.in"
# LAST MODIFICATION: "Mit, 10 Jan 2001 06:29:34 +0100 (joze)"
# (C) 1998 - 2001 by Johannes Zellner, <johannes@zellner.org>
# $Id$
# ---
# tclreadline -- gnu readline for tcl
# http://www.zellner.org/tclreadline/

    uplevel #0 {

	if {"" == [info commands ::tclreadline::readline]} {
	    ::tclreadline::Init
	}

	if {[catch {set a [::tclreadline::prompt1]}] && [info nameofexecutable] != ""} {
	if {"" == [info procs ::tclreadline::prompt1] && [info nameofexecutable] != ""} {

	    namespace eval ::tclreadline {
		variable prompt_string
		set base [file tail [info nameofexecutable]]

		if {[string match tclsh* $base] && [info exists tcl_version]} {
		    set prompt_string \

			regsub $env(HOME) $pwd "~" pwd
		    }
		    return "$prompt_string \[$pwd\]"
		}
	    }
	    # puts body=[info body ::tclreadline::prompt1]
	}

	if {"" == [info procs ::tclreadline::prompt2] && [info nameofexecutable] != ""} {

	    if {"" == [info procs ::tclreadline::prompt2]} {
		proc ::tclreadline::prompt2 {} {
		    return ">"
		}
	    }
	    # puts body=[info body ::tclreadline::prompt2]
	}

	if {"" == [info procs exit]} {

	    catch {rename ::tclreadline::Exit ""}
	    rename exit ::tclreadline::Exit

	    proc exit {args} {

    eval Setup ${args}

    uplevel #0 {

	while {1} {

	    if [info exists tcl_prompt2] {
		set prompt2 $tcl_prompt2
	    } else {
		set prompt2 ">"
	    }

	    if {[catch {
		if {"" != [namespace eval ::tclreadline {info procs prompt1}]} {
		    set LINE [::tclreadline::readline read \
		    set ::tclreadline::LINE [::tclreadline::readline read \
		    [::tclreadline::prompt1]]
		} else {
		    set LINE [::tclreadline::readline read %]
		    set ::tclreadline::LINE [::tclreadline::readline read %]
		}
		while {![::tclreadline::readline complete $LINE]} {
		    append LINE "\n"
		    append LINE [tclreadline::readline read ${prompt2}]
		while {![::tclreadline::readline complete $::tclreadline::LINE]} {
		    append ::tclreadline::LINE "\n"
		    if {"" != [namespace eval ::tclreadline {info procs prompt2}]} {
			append ::tclreadline::LINE \
			    [tclreadline::readline read [::tclreadline::prompt2]]
		    } else {
			append ::tclreadline::LINE [tclreadline::readline read >]
		    }
		}
	    } ::tclreadline::errorMsg]} {
		puts stderr [list tclreadline::Loop: error. \
		$::tclreadline::errorMsg]
		continue
	    }

	    # Magnus Eriksson <magnus.eriksson@netinsight.se> proposed
	    # to add the line also to tclsh's history.
	    #
	    # I decided to add only lines which are different from
	    # the previous one to the history. This is different
	    # from tcsh's behaviour, but I found it quite convenient
	    # while using mshell on os9.
	    #
	    if {[string length $::tclreadline::LINE] && \
	    if {[string length $LINE] && [history event 0] != $LINE} {
		history add $LINE
		    [history event 0] != $::tclreadline::LINE} {
		history add $::tclreadline::LINE
	    }

	    if [catch {
		set result [eval $LINE]
		if {$result != "" && [tclreadline::Print]} {
		    puts $result
		set ::tclreadline::result [eval $::tclreadline::LINE]
		if {$::tclreadline::result != "" && [tclreadline::Print]} {
		    puts $::tclreadline::result
		}
		set result ""
		set ::tclreadline::result ""
	    } ::tclreadline::errorMsg] {
		puts stderr $::tclreadline::errorMsg
		puts stderr [list while evaluating $LINE]
		puts stderr [list while evaluating $::tclreadline::LINE]
	    }

	}
    }
}

proc Print {args} {