This is a Tcl extension to execute JavaScript using the SpiderMonkey Javascript
interpreter from Tcl.

This package is a freely available open source package.  You can do
virtually anything you like with it, such as modifying it, redistributing
it, and selling it either in whole or in part.  See the file
"license.terms" for complete information.

CONTENTS
========
The following is a short description of the files you will find in
the sample extension.

Makefile.in	Makefile template.  The configure script uses this file to
		produce the final Makefile.

README		This file

aclocal.m4	Generated file.  Do not edit.  Autoconf uses this as input
		when generating the final configure script.  See "tcl.m4"
		below.

configure	Generated file.  Do not edit.  This must be regenerated
		anytime configure.in or tclconfig/tcl.m4 changes.

configure.in	Configure script template.  Autoconf uses this file as input
		to produce the final configure script.

pkgIndex.tcl.in Package index template.  The configure script will use
		this file as input to create pkgIndex.tcl.

tcljs.c	        Implementation of new Tcl command "js::interp"

tclconfig/	This directory contains various template files that build
		the configure script.  They should not need modification.

	install-sh	Program used for copying binaries and script files
			to their install locations.

	tcl.m4		Collection of Tcl autoconf macros.  Included by
			aclocal.m4 to define SC_* macros.

SPIDERMONKEY
============

This extension depends on the SpiderMonkey JavaScript interpreter. You can get
it from here:

    http://www.mozilla.org/js/spidermonkey/

Build SpiderMonkey before building the TclJs extension.

UNIX BUILD
==========

Building under most UNIX systems is easy, just run the configure script and
then run make. You will need to specify 3 configure parameters:

    --with-spidermonkey=<DIR>

        The directory in which SpiderMonkey is extracted and built. When you
        extracted the SpiderMonkey archive in /tmp, the directory is /tmp/js

    --with-spidermonkey-build-type=<BUILD-TYPE>

        The SpiderMonkey build type. To find this type, go to the src sub
        directory in the directory in which you extracted SpiderMonkey (this is
        also the directory in which you built SpiderMonkey). In the example
        given above this would be directory /tmp/js/src. A new sub-directory
        was added to this directory, the name of this directory is the required
        build type. On Linux this looks like: 

            Linux_All_DBG.OBJ

    --with-spidermonkey-flags=<FLAGS>

        When building SpiderMonkey, some -D flags are used to selec the
        appropriate parts of header file. These need to be specified with this
        configure parameter. On Linux, the following flags was required:

            -DXP_UNIX

The following minimal example will configure, compile, test and install the
extension in the /opt/tcl directory when SpiderMonkey was build in /tmp/js for
Linux:

	$ cd sampleextension
	$ ./configure --prefix=/opt/tcl \
	    --with-spidermonkey=/tmp/js \
	    --with-spidermonkey-build-type=Linux_All_DBG.OBJ \
	    --with-spidermonkey-flags=-DXP_UNIX
	$ make
	$ make test
	$ make install

WINDOWS BUILD
=============

Building on Windows was only tested using Makefile.vc and VC9. Alternative using
cygwin and/or msys were not tested.

To build Spidermonkey on Windows this command was used:

 > nmake -f js.mak CFG="js - Win32 Release"

You will need to use 'mt.exe' to add the manifest file to the generated dll. Run
this command in the 'Release' directory:

 > mt -manifest js32.dll.manifest -outputresource:js32.dll;2

Building, test and install the extension with the following commands (int the
win directory):

 > nmake -f makefile.vc TCLDIR=c:\Tcl SPIDERMONKEYDIR=c:\tmp\js \
       SPIDERMONKEYTYPE=Release SPIDERMONKEYFLAGS=/DXP_WIN clean
 > nmake -f makefile.vc TCLDIR=c:\Tcl SPIDERMONKEYDIR=c:\tmp\js \
       SPIDERMONKEYTYPE=Release SPIDERMONKEYFLAGS=/DXP_WIN
 > nmake -f makefile.vc TCLDIR=c:\Tcl SPIDERMONKEYDIR=c:\tmp\js \
       SPIDERMONKEYTYPE=Release SPIDERMONKEYFLAGS=/DXP_WIN test
 > nmake -f makefile.vc TCLDIR=c:\Tcl SPIDERMONKEYDIR=c:\tmp\js \
       SPIDERMONKEYTYPE=Release SPIDERMONKEYFLAGS=/DXP_WIN install

After install, copy the js32.dll and required MSVCR* files into the lib
directory where TclJs01.dll is located.

INSTALLATION
============

The installation of a TEA package is structure like so:

         $exec_prefix
          /       \
        lib       bin
         |         |
   PACKAGEx.y   (dependent .dll files on Windows)
         |
  pkgIndex.tcl (.so|.dll files)

The main .so|.dll library file gets installed in the versioned PACKAGE
directory, which is OK on all platforms because it will be directly
referenced with by 'load' in the pkgIndex.tcl file.  Dependent DLL files on
Windows must go in the bin directory (or other directory on the user's
PATH) in order for them to be found.