******************** tcl7.5plus.patch (updated 5/21/96) **********************
*									  *
* Written by:	Jan Nijtmans						  *
*		NICI (Nijmegen Institute of Cognition and Information)	  *
*		email: nijtmans@nici.kun.nl				  *
*		url:   http://www.nici.kun.nl/~nijtmans/		  *
*									  *
***************************************************************************

This patch updates from Tcl 7.5 to Tcl 7.5+. It should be applied
by running the "patch" program in the top-level directory of a clean
Tcl 7.5 release, using the command "patch -p <tcl7.5plus.patch"

Then run "configure", and do "make" in this directory. This creates
all libraries and the Tcl7.5 shell (tclsh). Then do "make install"
(in super-user mode) to install it on your machine for general use.

This patch adds a lot of functionality to the standard distributions
of Tcl7.5, such as:

* Tclsh is now fully event-driven. Events can now be processed during
  command imput. This is one of the changes required to make Tk
  dynamically loadable. It works for Mac and Windows too, and it is
  fully upwards compatible with the official Tcl7.5.

* If "--enable-shared" is specified, both the shared and the static
  libraries are created.

* Better support for a.out loadable libraries. ldAout.tcl is extended
  to create archives (such as libtk4.1_GO.a for Ultrix) that can be
  loaded in the same way as objects.

* Standalone Applications. Now an extra function Tcl_InitStandAlone() is
  available that performs the same function as Tcl_Init(). The difference
  is that all the files in /usr/local/lib/tcl7.5/ are now compiled into
  the application. This makes the executable larger (about 7 kbyte), but
  it will run on any machine (of the same architecture). It makes no
  difference any more if Tcl is installed or not, or which version.

* tcl2c. A tiny compiler (only 10 kBytes of source-code, the executable
  is about 17 kByte for Solaris2.4 ) that compiles any well-formed
  tcl-script into C-source code. The resulting output can be compiled
  using any C (K&R, ANSI) or C++  compiler. As an example for how to
  use it, there is a "hello.tcl" script in the distribution. You can
  compile this example by:
	tcl2c hello.tcl -o hello.c -tcl		(create hello.c)
	cc -o hello hello.c libtcl.a -lm	(create hello)
  Or, simply do:
	make hello
  The result is a binary executable that performs the same function as
  the original "hello.tcl" script. It will run as a standalone
  application, excuting your own script that you compiled into it.
  Don't expect any faster operation, because everything is still
  interpreted internally.

* C++ support. tclAppInit.c and some other files have been adapted
  such that it can be compiled with any C++ compiler. Try:
	make tclsh++
  This will create a C++ version of tclsh (if you have a C++ compiler).

* Namespace support. This small utility is almost entirely written in
  tcl, and fully upwards compatible with Tcl7.5. It can be easily
  removed by deleting a few lines in the file "init.tcl".

* Static variables, both for namespaces and procedures.

* Tests are done using shared libraries Tcltest.so and Tclunixtest.so
  if possible

* Added support for some extra mathematical functions: erf(), erfc(),
  lgamma(), j0(), j1(), jn(), y0() ,y1() and yn().

CONFIGURE
=========

The configure script has the following options:

	configure --disable-load	disallow dynamic loading and load command
	configure --enable-shared	enable creation of shared library

These options can be used combined. They influence which files will
be created when you do "make" or "make all".

MAKE
====
You can make the following extra files:
	make tclsh		Shared version of tclsh (default)
	make tclsh++		C++ version of tclsh
	make tclsh.static	Static version of tclsh
	make tclsh.standalone	Standalone version of tclsh
	make plusplus		the same as make tclsh++
	make static		the same as make tclsh.static
	make standalone		the same as make tclsh.standalone
	make test		Execute tests using tclsh and Tcltest.so
	make test++		Execute tests using tclsh++ and Tcltest.so
	make test.static	Execute tests using tclsh.static and Tcltest.so
	make test.standalone	Execute tests using tclsh.standalone and Tcltest.so
	make hello.c		C-source of hello.tcl
	make hello		binary executable of hello.tcl
	make hello++		binary executable of hello.tcl (using C++)