[TCLCORE] Tcllib 2.0 RELEASED

[Andreas K. <and...@gm...>]

Hi all.

I am pleased to announce the release of Tcllib 2.0, supporting Tcl 9.0.

Details about download, changes, etc. can be found at the technote

https://core.tcl-lang.org/tcllib/technote/4a474d8ae3608f1f13ef77049f334be397a18
485

Tcllib 2.0 is the first major revision of Tcllib after a long series of
minor 1.x releases.

This revision

  1. __drops support__ for Tcl versions before 8.5.

       - All packages now require Tcl 8.5 as their minimum runtime.

       - This does not mean that the implementations are already
         changed to use Tcl 8.5 features.

       - Such changes will be done incrementally.

       - Users of Tcl 8.4 or even older still have Tcllib 1.21
         available to them.

  2. __adds support__ for Tcl 9, for both Tcl and C implementations
     (where available).

       - It is the first revision to have such support.

       - Tcllib 1.21 and older will not work with Tcl 9.

  3. enhances the visibility of the __C accelerators__ available for
     various Tcllib packages through the adjunct __Tcllibc__ binary
     package.

     Tcllibc's version has become 2.0 also, to match Tcllib itself.

       - The Makefile's `install` target is extended to install both
         Tcllib and Tcllibc.

	 In other words, Tcllibc is now __built by default__,
	 requiring a Critcl __3.3__ installation.

	 Even so, Tcllibc is __still optional__, and Tcllib can still
	 be built and installed without it.

       - To install only Tcllib use the new target `install-tcl`.

       - To install only Tcllibc use the new target `install-binaries`.

       - __Beware__ that Tcllibc, as a binary package, has to be
         compiled for either Tcl 8 or Tcl 9.

       - __Beware__, that the Tcllibc binary package requires Tcl 8.6
       	 as its minimum runtime.  This is due to the Tcl 9 portability
       	 support, which requires 8.6 on the other side of the border.
       	 This should not be a true hardship.  Tcllib 1.21 is still
       	 available, and does not have this restriction.

Further documentation, including more detailed instructions on how to
build and install Tcllib/Tcllibc, is available at
<https://core.tcl-lang.org/tcllib>

-- 
Happy Tcling,
	Andreas Kupries <and...@gm...>
			<https://core.tcl-lang.org/akupries/>
			<https://akupries.tclers.tk/>
	Developer @	SUSE Software Solutions Germany GmbH
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