Installation guide

G.8 Development Environment
DIGITAL UNIX Version 4.0B includes the enhancements to the
development environment that are discussed in the following sections.
G.8.1 Tcl/Tk Availability
Tcl/Tk is now available as part of the base operating system. Tcl/Tk is a
public domain unencumbered scripting language and graphical tool kit. In
addition to Tcl/Tk, a popular extension package, TclX is also included. TclX
provides many UNIX extensions to the Tcl command language. Tcl version
7.4, Tk version 4.0, and TclX version 7.4 are included in this release. See
the Installation Guide for information on how to identify and install the
appropriate software subsets.
The available programs are:
• /usr/bin/tcl
A tcl shell with TclX extensions
• /usr/bin/tclsh
A hard link to /usr/bin/tcl
• /usr/bin/wishx
A Tcl/Tk/tclX shell
• /usr/bin/wish
A hard link to /usr/bin/wishx
• /usr/bin/tclhelp
A graphical help browser for Tcl help
G.8.1.1 ULTRIX Migration Issues
There are no ULTRIX migration issues.
G.8.2 DEC C++
The following changes have been implemented for DEC C++:
• DEC C++ Version 5.3 Class Library is now threadsafe. See the DEC
C++ Class Library Reference Manual for details on the threadsafe
support, including a new Mutex Package.
• Complex division catches divide-by-zero errors. The division routines
within the Complex Library now catch divide-by-zero errors instead of
signaling them.
G–10 Migration from ULTRIX Version 4.5 to DIGITAL UNIX Version 4.0B