[Xotcl] XOTcl 1.5.5 available

Gustaf Neumann neumann at wu-wien.ac.at
Tue Sep 18 21:32:55 CEST 2007

Dear XOTcl Community,

XOTcl 1.5.5 is available. The main change is to achieve binary 
between Tcl 8.5 and XOTcl compiled with Tcl 8.4. This is essential achieved
through a small emulation layer based on C-structures that will be available
in Tcl 8.5.

best regards
-gustaf neumann

Announcing XOTcl 1.5.5

We are pleased to announce the availability of XOTcl 1.5.5.

Major changes relative to 1.5.4 are:

    * Improved binary compatibility: 

      It is now possible to load XOTcl compiled for Tcl 8.4 
      into a tclsh8.5 (again, substantial change).

      One can now test now 4 versions:
      a) a native version for Tcl 8.4 (without compatibility layer)
      b) a native version for Tcl 8.5
      c) a version compiled for Tcl 8.4 with compatibility layer in tclsh8.4
      d) a version compiled for Tcl 8.4 with compatibility layer in tclsh8.5 

      Tests showed that the overhead is for the compatibility
      layer is between 1.1% and 2.3%, the difference between 
      tcl8.5 and tcl8.4 is much larger.

      The forward compatibility behavior behavior can be turned off by setting 
      FORWARD_COMPATIBLE to 0 during compilation (xotcl.h) to get
      a small performance improvement.

 For more details about the changes, please consult the ChangeLog and

  General and more detailed information about XOTcl and its components
  can be found at http://www.xotcl.org

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