Tcl/Tk 8.5.16 发布，更新内容如下：
* Many fixes and improvements to Tk on OSX Cocoa and Retina displays.
Build support for Xcode 5.1+.
* Update to Unicode 7.0.
*** POTENTIAL INCOMPATIBILITY ***
* Enhancement: %E%G%X support in [scan].
* Enhancement: PPM [$image write] now permits max value of 65535.
* Fix: bad components in [$image write] files with transparency.
* Fix: [menu] event race that made popup vanish immediately.
* Fix: Win: avoid stall in async socket connect.
* Fix: Win: readable event on async connect failure.
* Fix: combobox invalid state from interactive selection.
* Fix: Maintain validity in use of bytearray optimizations.
* Workaround: TCL_TEMPLOAD_NO_UNLINK for [load] from kit troubles.
* Fixed crashes in...
- [dict] bytecode compilers
- trace-induced race deleting a command and its import
- recursive reflected channel operations
- suicidal [close] or [interp delete] in reflected channel ops
- unstacking stacked channels in mid-operation.
- multi-threaded reflected channel map teardown
* Revised refcount usage for Tcl_SetVar*(..,TCL_APPEND_VALUE)
*** POTENTIAL INCOMPATIBILITY ***
* Stop eof & blocked state leakage through stacked channels
*** POTENTIAL INCOMPATIBILITY for channel drivers ***
* Tcl_Channel is no longer Tcl_Preserve()-able.
*** POTENTIAL INCOMPATIBILITY ***
* Fix: channel background flush workaround broken select() syscalls.
* Fix: Tcl_CreateNamespace(..., "foo::", ...) deletion failures.
* Fix: many [info frame] line number reports.
* Fix: Win: avoid serial channel double open; Bluetooth woes.
* Fix: Win: no \ in normalized extended paths.
* Significant refactoring in I/O core functions.
* Win: update sockets implementation to use Winsock 2.2 .
* Platform support improvements: Win 8.1, FreeBSD 10.0, HP-UX.
* Fix: X: handling of fontconfig dependency in Tk builds.
* New package releases:
http 2.7.13: Accept upper case schemes in URLs
tcltest 2.3.7: cleanup runs before output comparisons
platform 1.0.13: Update macosx-* variant compatibilities
Tcl/Tk 是一种简明，高效，可移植性好的编程语言。在信息产业领域具有广泛的应用。 Tcl/Tk 的发明人 John Ousterhout 教授在八十年代初，是伯克利大学的教授。在其教学过程中，他发现在集成电路 CAD 设计中，很多时间是花在编程建立测试环境上。并且，环境一旦发生了变化，就要重新修改代码以适应。这种费力而又低效的方法，迫使 Ousterhout 教授力图寻找一种新的编程语言，它即要有好的代码可重用性，又要简单易学，这样就促成了 Tcl (Tool Command Language) 语言的产生。 Tcl 最初的构想的是希望把编程按照基于组件的方法 (component approach)，即与其为单个的应用程序编写成百上千行的程序代码，不如寻找一个种方法将程序分割成一个个小的, 具备一定“完整”功能的，可重复使用的组件。这些小的组件小到可以基本满足一些独立的应用程序的需求，其它部分可由这些小的组件功能基础上生成。不同的组件有不同的功能，用于不同的目的。并可为其它的应用程序所利用。当然, 这种语言还要有良好的扩展性, 以便用户为其增添新的功能模块。最后，需要用一种强的，灵活的“胶水”把这些组件“粘”合在一起, 使各个组件之间可互相“通信”，协同工作。程序设计有如拼图游戏一样，这种设计思想与后来的 Java 不谋而合。终于在 1988 年的春天, 这种强大灵活的胶水 - Tcl 语言被发明出来了。
软件详情：http://www.tcl.tk/software/tcltk/8.6.html
下载地址：http://www.tcl.tk/software/tcltk/download.html
来自:开源中国社区
